CN115537698A - Hot-dip galvanizing smokeless plating assistant and hot-dip galvanizing method - Google Patents
Hot-dip galvanizing smokeless plating assistant and hot-dip galvanizing method Download PDFInfo
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- CN115537698A CN115537698A CN202211198945.XA CN202211198945A CN115537698A CN 115537698 A CN115537698 A CN 115537698A CN 202211198945 A CN202211198945 A CN 202211198945A CN 115537698 A CN115537698 A CN 115537698A
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- hot
- sulfate
- dip galvanizing
- plating
- smokeless
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- 238000007747 plating Methods 0.000 title claims abstract description 159
- 238000005246 galvanizing Methods 0.000 title claims abstract description 125
- 238000000034 method Methods 0.000 title claims abstract description 59
- 230000008569 process Effects 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims abstract description 10
- 238000005260 corrosion Methods 0.000 claims abstract description 9
- 230000007797 corrosion Effects 0.000 claims abstract description 9
- 239000003112 inhibitor Substances 0.000 claims abstract description 7
- 239000003381 stabilizer Substances 0.000 claims abstract description 7
- 239000004094 surface-active agent Substances 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 85
- 239000010959 steel Substances 0.000 claims description 85
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 30
- 239000011701 zinc Substances 0.000 claims description 30
- 229910052725 zinc Inorganic materials 0.000 claims description 30
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 22
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 22
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 22
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 22
- 229910000368 zinc sulfate Inorganic materials 0.000 claims description 22
- 229960001763 zinc sulfate Drugs 0.000 claims description 22
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 17
- 230000004907 flux Effects 0.000 claims description 14
- NROKBHXJSPEDAR-UHFFFAOYSA-M potassium fluoride Chemical compound [F-].[K+] NROKBHXJSPEDAR-UHFFFAOYSA-M 0.000 claims description 14
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims description 12
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 claims description 12
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 10
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 9
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 9
- 235000011152 sodium sulphate Nutrition 0.000 claims description 9
- -1 alkyl glycoside Chemical class 0.000 claims description 8
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 claims description 8
- 229910052939 potassium sulfate Inorganic materials 0.000 claims description 8
- 235000011151 potassium sulphates Nutrition 0.000 claims description 8
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 7
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 7
- 235000003270 potassium fluoride Nutrition 0.000 claims description 7
- 239000011698 potassium fluoride Substances 0.000 claims description 7
- REZZEXDLIUJMMS-UHFFFAOYSA-M dimethyldioctadecylammonium chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCCCC[N+](C)(C)CCCCCCCCCCCCCCCCCC REZZEXDLIUJMMS-UHFFFAOYSA-M 0.000 claims description 6
- 235000010299 hexamethylene tetramine Nutrition 0.000 claims description 6
- 239000004312 hexamethylene tetramine Substances 0.000 claims description 6
- 235000013024 sodium fluoride Nutrition 0.000 claims description 6
- 239000011775 sodium fluoride Substances 0.000 claims description 6
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims description 5
- 235000019341 magnesium sulphate Nutrition 0.000 claims description 5
- 229940099596 manganese sulfate Drugs 0.000 claims description 5
- 235000007079 manganese sulphate Nutrition 0.000 claims description 5
- 239000011702 manganese sulphate Substances 0.000 claims description 5
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 claims description 5
- 229910000365 copper sulfate Inorganic materials 0.000 claims description 4
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 4
- 229930182470 glycoside Natural products 0.000 claims description 4
- DBJLJFTWODWSOF-UHFFFAOYSA-L nickel(ii) fluoride Chemical compound F[Ni]F DBJLJFTWODWSOF-UHFFFAOYSA-L 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 3
- MIMUSZHMZBJBPO-UHFFFAOYSA-N 6-methoxy-8-nitroquinoline Chemical compound N1=CC=CC2=CC(OC)=CC([N+]([O-])=O)=C21 MIMUSZHMZBJBPO-UHFFFAOYSA-N 0.000 claims description 2
- RCEAADKTGXTDOA-UHFFFAOYSA-N OS(O)(=O)=O.CCCCCCCCCCCC[Na] Chemical compound OS(O)(=O)=O.CCCCCCCCCCCC[Na] RCEAADKTGXTDOA-UHFFFAOYSA-N 0.000 claims description 2
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 2
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 2
- 239000012964 benzotriazole Substances 0.000 claims description 2
- MTNDZQHUAFNZQY-UHFFFAOYSA-N imidazoline Chemical compound C1CN=CN1 MTNDZQHUAFNZQY-UHFFFAOYSA-N 0.000 claims description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 2
- 239000010452 phosphate Substances 0.000 claims description 2
- 229910000162 sodium phosphate Inorganic materials 0.000 claims description 2
- 150000003467 sulfuric acid derivatives Chemical class 0.000 claims description 2
- CVIKLBFHCCGYHS-UHFFFAOYSA-N [Na].[Na].OCC(P(O)(O)=O)P(O)(O)=O Chemical compound [Na].[Na].OCC(P(O)(O)=O)P(O)(O)=O CVIKLBFHCCGYHS-UHFFFAOYSA-N 0.000 claims 1
- 239000000779 smoke Substances 0.000 abstract description 29
- 230000000694 effects Effects 0.000 abstract description 7
- 150000003839 salts Chemical class 0.000 abstract description 5
- 239000012752 auxiliary agent Substances 0.000 abstract 1
- 238000005238 degreasing Methods 0.000 description 36
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 34
- 239000000203 mixture Substances 0.000 description 29
- 238000007598 dipping method Methods 0.000 description 16
- 238000005554 pickling Methods 0.000 description 13
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 8
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 8
- 239000002253 acid Substances 0.000 description 7
- 125000003354 benzotriazolyl group Chemical class N1N=NC2=C1C=CC=C2* 0.000 description 7
- IYEJVYCOCVJYNV-UHFFFAOYSA-N P1(=O)OC(CO)OP(O1)=O.[Na].[Na] Chemical compound P1(=O)OC(CO)OP(O1)=O.[Na].[Na] IYEJVYCOCVJYNV-UHFFFAOYSA-N 0.000 description 6
- 235000019270 ammonium chloride Nutrition 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 6
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 5
- 150000002191 fatty alcohols Chemical class 0.000 description 5
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 235000005074 zinc chloride Nutrition 0.000 description 4
- 239000011592 zinc chloride Substances 0.000 description 4
- 239000001164 aluminium sulphate Substances 0.000 description 3
- 235000011128 aluminium sulphate Nutrition 0.000 description 3
- BUACSMWVFUNQET-UHFFFAOYSA-H dialuminum;trisulfate;hydrate Chemical compound O.[Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O BUACSMWVFUNQET-UHFFFAOYSA-H 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- LDDQLRUQCUTJBB-UHFFFAOYSA-O azanium;hydrofluoride Chemical compound [NH4+].F LDDQLRUQCUTJBB-UHFFFAOYSA-O 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- NSEQHAPSDIEVCD-UHFFFAOYSA-N N.[Zn+2] Chemical compound N.[Zn+2] NSEQHAPSDIEVCD-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- RKOIPNDCYGGBMZ-UHFFFAOYSA-L disodium;hydroxy-[2-hydroxy-1-[hydroxy(oxido)phosphoryl]ethyl]phosphinate Chemical compound [Na+].[Na+].OCC(P(O)(O)=O)P([O-])([O-])=O RKOIPNDCYGGBMZ-UHFFFAOYSA-L 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229960004889 salicylic acid Drugs 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating With Molten Metal (AREA)
Abstract
The invention discloses a hot-dip galvanizing smokeless plating assistant and a hot-dip galvanizing method. The hot-dip galvanizing smokeless plating assistant comprises the following components in percentage by mass: sulfate: 5% -15%; a stabilizer: 0.1 to 1 percent; corrosion inhibitor: 0.1 to 0.5 percent; surfactant (b): 0.05 to 3 percent; water: and (4) the balance. The hot-dip galvanizing smokeless auxiliary agent takes sulfate as main salt, has simple formula and low cost, generates no smoke completely in the hot-dip galvanizing process, has good galvanizing effect and is suitable for large-scale industrial application.
Description
Technical Field
The invention relates to the technical field of hot-dip galvanizing, in particular to a hot-dip galvanizing smokeless plating assistant and a hot-dip galvanizing method.
Background
Steel exposed in natural environment is easy to be corroded by corrosive medium, so that the service performance of the steel is damaged. The hot-dip galvanizing technology can provide barrier protection and sacrificial anode protection for steel, greatly improves the corrosion resistance of the steel, becomes the most widely applied steel corrosion prevention technology at present, and is widely applied to the fields of electric power, traffic, communication, household appliances and the like (such as highway guardrails, extra-high voltage transmission towers, communication towers, lamp posts and the like).
The assistant plating is an important pretreatment procedure in the hot-dip galvanizing technology, can remove the oxide on the surface of a workpiece and protect the surface of the workpiece from being oxidized before dip plating, and can also activate the surface of the workpiece to improve the wetting capacity of zinc liquid on the workpiece, thereby improving the quality of a plating layer. Aqueous solutions of zinc chloride and ammonium chloride are commonly used plating aids at present, but workpieces treated by the plating aids generate a large amount of smoke during hot dip galvanizing (the smoke mainly has two sources, namely, on one hand, the ammonium chloride in the plating aids can be decomposed to generate hydrogen chloride and ammonia gas in the plating process, and the two gases can generate ammonium chloride white smoke in the air, and on the other hand, chloride ions in the plating aids can react with aluminum in a zinc bath to generate cyan aluminum chloride), so that the environment is seriously polluted, the health of human bodies is harmed, and the green development concept is not met. Therefore, the smokeless plating assistant agent becomes one of the research hotspots in the current hot-dip galvanizing industry.
CN 103173706A discloses a smokeless plating assistant for batch hot dip galvanizing, CN 108179368A discloses a smokeless plating assistant for hot dip galvanizing without zinc ammonium, and CN 103834888A discloses a smokeless plating assistant for hot dip galvanizing, which generates less smoke in the galvanizing process, but because the plating assistants are main salts taking chloride as the plating assistant, aluminum chloride smoke cannot be removed from the root, and smokeless hot dip galvanizing cannot be really realized.
Therefore, the development of the plating assistant agent which has no smoke generation in the hot-dip galvanizing process, has good galvanizing effect and can effectively solve the smoke pollution problem in the galvanizing process is of great significance.
Disclosure of Invention
The invention aims to provide a hot-dip galvanizing smokeless plating assistant and a hot-dip galvanizing method.
The technical scheme adopted by the invention is as follows:
the hot-dip galvanizing smokeless plating assistant comprises the following components in percentage by mass:
sulfate salt: 5% -15%;
a stabilizer: 0.1 to 1 percent;
corrosion inhibitor: 0.1 to 0.5 percent;
surfactant (B): 0.05 to 3 percent;
water: and the balance.
Preferably, the sulfate is at least two of zinc sulfate, ammonium sulfate, sodium sulfate, potassium sulfate, aluminum sulfate, magnesium sulfate, manganese sulfate and copper sulfate, and the zinc sulfate and the ammonium sulfate must be contained.
Preferably, the total mass percentage content of the zinc sulfate and the ammonium sulfate in the sulfate is more than or equal to 50%.
Preferably, the mass ratio of the zinc sulfate to the ammonium sulfate is 1.
Preferably, the stabilizer is at least one of sodium fluoride, potassium fluoride, ammonium bifluoride and nickel fluoride.
Preferably, the corrosion inhibitor is at least one of disodium hydroxyethylidene diphosphonate, hexamethylenetetramine, benzotriazole and imidazoline.
Preferably, the surfactant is at least one of N-dodecyl dimethyl betaine, fatty alcohol-polyoxyethylene ether, dioctadecyl dimethyl ammonium chloride, lauryl sodium sulfate, phosphate and alkyl glycoside.
The hot dip galvanizing method adopts the hot dip galvanizing smoke-free plating assistant agent in the plating assistant process.
Preferably, a hot-dip galvanizing method includes the steps of: adjusting the pH value of the plating assistant agent to 3.5-5.5, immersing the steel plated piece subjected to oil removal treatment and rust removal treatment into the plating assistant agent for plating assistant, taking out the steel plated piece, drying, immersing into zinc liquid for plating, and taking out the steel plated piece.
Preferably, the plating assistant is carried out at the temperature of 20-80 ℃, and the plating assistant time is 10-180 s.
The invention has the beneficial effects that: the smokeless galvanizing assistant for hot-dip galvanizing takes sulfate as main salt, has simple formula and low cost, generates no smoke completely in the hot-dip galvanizing process, has good galvanizing effect and is suitable for large-scale industrial application.
Specifically, the method comprises the following steps:
1) The hot-dip galvanizing smokeless plating assistant adopts sulfate to replace zinc chloride and ammonium chloride in the traditional plating assistant, has the functions of cleaning, protecting and activating the surface of a plated piece, generates no smoke completely in the dip plating process, and can solve the problem of smoke pollution in the dip plating process of the traditional plating assistant;
2) The price and the dosage of the sulfate in the hot-dip galvanizing smokeless plating assistant agent are far lower than those of zinc chloride and ammonium chloride in the traditional plating assistant agent, so that the production cost can be reduced;
3) The stabilizing agent in the hot-dip galvanizing smokeless plating assistant can form a layer of compact protective film on the surface of a plated piece, so that the plated piece can be prevented from being oxidized before dip galvanizing and from being leaked after dip galvanizing;
4) The smokeless plating assistant for hot dip galvanizing is added with a trace amount of corrosion inhibitor, so that the corrosion of the plating assistant to steel can be slowed down, the iron ion content in the plating assistant can be reduced, and the plating assistant effect is enhanced;
5) The surfactant in the hot-dip galvanizing smokeless plating assistant can greatly reduce the surface tension of the plating assistant, further improve the uniformity and the coverage of a salt film formed on the surface of a plated part, and finally improve the wetting capacity of the plating assistant on the surface of the plated part;
6) Compared with the traditional plating assistant agent, the formed plating assistant salt film is more uniform and compact, which is beneficial to preventing a plated piece from being oxidized before dip plating, and further a smooth and non-plating-missing zinc plating layer can be obtained;
7) The hot-dip galvanizing smokeless plating assistant has a simple preparation method, and is prepared by uniformly dispersing sulfate, a stabilizer, a corrosion inhibitor and a surfactant in water.
Drawings
FIG. 1 is an external view of a plated layer formed on the surface of a steel sheet after plating assistance in the examples.
Detailed Description
The invention will be further explained and illustrated with reference to specific examples.
Example 1:
a hot-dip galvanising smokeless flux having the composition given in the following table:
TABLE 1 composition table of smokeless plating assistant for hot-dip galvanizing
| Components | Mass percent (%) |
| Zinc sulfate | 2 |
| Ammonium sulfate | 3 |
| Potassium sulfate | 3 |
| Sodium fluoride | 1 |
| Imidazoline | 0.1 |
| Fatty alcohol polyoxyethylene ether | 0.1 |
| Water (W) | 90.8 |
A hot dip galvanising method comprising the steps of:
the pH value of the hot-dip galvanizing smokeless plating assistant is adjusted to 5.5 by industrial sulfuric acid with the mass fraction of 98 percent, a steel plate which is subjected to degreasing and degreasing treatment and acid cleaning rust removal treatment is immersed into the plating assistant for 180s at the temperature of 25 ℃, the steel plate is taken out and dried at the temperature of 80 ℃, is immersed into zinc liquid at the temperature of 450 ℃ for 60s (no smoke and little scum are generated in the dipping process), and is cooled to room temperature after being taken out (the appearance diagram of a plating layer formed on the surface of the steel plate is shown in figure 1, a bright and flat zinc plating layer is obtained on the surface of the steel plate, and the phenomenon of plating leakage is avoided).
Example 2:
a hot-dip galvanizing smokeless plating assistant comprises the following components:
TABLE 2 composition table of smokeless plating assistant for hot-dip galvanizing
| Components | Mass percent (%) |
| Zinc sulfate | 2 |
| Ammonium sulfate | 8 |
| Sodium sulfate | 1 |
| Potassium fluoride | 0.5 |
| Benzotriazole compounds | 0.2 |
| Dioctadecyl dimethyl ammonium chloride | 2 |
| Water (W) | 86.3 |
A hot dip galvanising method comprising the steps of:
the pH value of the hot-dip galvanizing smokeless plating assistant is adjusted to 3.5 by industrial sulfuric acid with the mass fraction of 98 percent, then a steel plate which is subjected to degreasing and degreasing treatment and acid cleaning and rust removing treatment is immersed into the plating assistant for 90s at 40 ℃, then the steel plate is taken out and dried at 80 ℃, is immersed into zinc liquid at 450 ℃ for 60s (no smoke and little scum are generated in the dipping process), and then the steel plate is taken out and cooled to room temperature (the surface of the steel plate obtains a bright and flat galvanized layer without plating leakage phenomenon).
Example 3:
a hot-dip galvanising smokeless flux having the composition given in the following table:
TABLE 3 composition table of smokeless plating assistant agent for hot dip galvanizing
| Components | Mass percent (%) |
| Zinc sulfate | 3 |
| Ammonium sulfate | 5 |
| Potassium sulfate | 2 |
| Aluminium sulphate | 1 |
| Sodium fluoride | 0.2 |
| Potassium fluoride | 0.3 |
| Disodium hydroxyethylidene diphosphonate | 0.1 |
| Benzotriazole compounds | 0.2 |
| N-dodecyl dimethyl betaine | 3 |
| Water (W) | 85.2 |
A hot dip galvanising method comprising the steps of:
the pH value of the hot-dip galvanizing smokeless plating assistant is adjusted to 4 by industrial sulfuric acid with the mass fraction of 98%, then a steel plate which is subjected to degreasing and degreasing treatment and pickling rust removal treatment is immersed in the plating assistant for 60s at the temperature of 60 ℃, then the steel plate is taken out and dried at the temperature of 80 ℃, is immersed in zinc liquid for 60s at the temperature of 450 ℃ (no smoke and little scum are generated in the dipping process), and then the steel plate is taken out and cooled to room temperature (the surface of the steel plate obtains a bright and flat galvanized layer without plating leakage phenomenon).
Example 4:
a hot-dip galvanizing smokeless plating assistant comprises the following components:
TABLE 4 composition table of smokeless plating assistant for hot-dip galvanizing
| Components | Mass percent (%) |
| Zinc sulfate | 5 |
| Ammonium sulfate | 5 |
| Sodium sulfate | 2 |
| Magnesium sulfate | 1 |
| Ammonium hydrogen fluoride | 0.3 |
| Hexamethylenetetramine | 0.5 |
| Sodium dodecyl sulfate | 2.5 |
| Water (W) | 83.7 |
A hot dip galvanising method comprising the steps of:
the pH value of the hot-dip galvanizing smokeless plating assistant is adjusted to 4.5 by industrial sulfuric acid with the mass fraction of 98 percent, then a steel plate which is subjected to degreasing and degreasing treatment and pickling rust removal treatment is immersed into the plating assistant for 180s at 30 ℃, then the steel plate is taken out and dried at 80 ℃, is immersed into zinc liquid at 450 ℃ for 60s (no smoke and little scum are generated in the dipping process), and then the steel plate is taken out and cooled to room temperature (the surface of the steel plate obtains a bright and flat galvanized layer without plating leakage phenomenon).
Example 5:
a hot-dip galvanizing smokeless plating assistant comprises the following components:
TABLE 5 composition table of hot-dip galvanizing smokeless plating assistant
A hot dip galvanising method comprising the steps of:
the pH value of the hot-dip galvanizing smokeless plating assistant is adjusted to 5 by using industrial sulfuric acid with the mass fraction of 98%, then a steel plate which is subjected to degreasing and degreasing treatment and pickling rust removal treatment is immersed into the plating assistant for 150s at 70 ℃, then the steel plate is taken out and dried at 80 ℃, is immersed into a zinc liquid at 450 ℃ for 60s (no smoke and little scum are generated in the dipping process), and then the steel plate is taken out and cooled to room temperature (a bright and flat galvanized layer is obtained on the surface of the steel plate, and no plating leakage phenomenon exists).
Example 6:
a hot-dip galvanizing smokeless plating assistant comprises the following components:
TABLE 6 composition table of smokeless plating assistant for hot-dip galvanizing
| Components | Mass percent (%) |
| Zinc sulfate | 4 |
| Ammonium sulfate | 5 |
| Aluminium sulphate | 1 |
| Manganese sulfate | 3 |
| Sodium fluoride | 0.1 |
| Nickel fluoride | 0.5 |
| Hexamethylenetetramine | 0.2 |
| Benzotriazole compounds | 0.1 |
| Alkyl glycosides | 1 |
| Water (W) | 85.1 |
A hot dip galvanising method comprising the steps of:
the pH value of the hot-dip galvanizing smokeless plating assistant is adjusted to 5.5 by industrial sulfuric acid with the mass fraction of 98 percent, then a steel plate which is subjected to degreasing and degreasing treatment and acid cleaning and rust removing treatment is immersed into the plating assistant for plating for 80 seconds at the temperature of 80 ℃, then the steel plate is taken out and dried at the temperature of 80 ℃, is immersed into zinc liquid for plating for 60 seconds at the temperature of 450 ℃ (no smoke and little scum are generated in the plating process), and then the steel plate is taken out and cooled to room temperature (the surface of the steel plate obtains a bright and flat galvanized layer without plating leakage phenomenon).
Example 7:
a hot-dip galvanising smokeless flux having the composition given in the following table:
TABLE 7 composition table of hot-dip galvanizing smokeless plating assistant
| Components | Mass percent (%) |
| Zinc sulfate | 5 |
| Ammonium sulfate | 8 |
| Sodium sulfate | 1 |
| Copper sulfate | 1 |
| Ammonium fluoride | 0.2 |
| Ammonium hydrogen fluoride | 0.5 |
| Disodium hydroxyethylidene diphosphonate | 0.3 |
| Sodium dodecyl sulfate | 0.5 |
| Phosphoric acidEsters of salicylic acid | 0.5 |
| Water (I) | 83 |
A hot dip galvanising method comprising the steps of:
the pH value of the hot-dip galvanizing smokeless plating assistant is adjusted to 4 by using industrial sulfuric acid with the mass fraction of 98%, then the steel plate which is subjected to degreasing and degreasing treatment and acid pickling rust removal treatment is immersed into the plating assistant for 90s at 75 ℃, then the steel plate is taken out and dried at 80 ℃, is immersed into zinc liquid at 450 ℃ for 60s (no smoke and less scum are generated in the dipping process), and then the steel plate is taken out and cooled to room temperature (a bright and flat galvanized layer is obtained on the surface of the steel plate, and the plating missing phenomenon does not exist).
Example 8:
a hot-dip galvanising smokeless flux having the composition given in the following table:
TABLE 8 composition table of hot-dip galvanizing smokeless plating assistant
A hot dip galvanising method comprising the steps of:
the pH value of the hot-dip galvanizing smokeless plating assistant is adjusted to 3.5 by industrial sulfuric acid with the mass fraction of 98 percent, then a steel plate which is subjected to degreasing and degreasing treatment and pickling rust removal treatment is immersed into the plating assistant for plating for 120s at 65 ℃, then the steel plate is taken out and dried at 80 ℃, is immersed into zinc liquid at 450 ℃ for 60s (no smoke and less scum are generated in the dipping process), and then the steel plate is taken out and cooled to room temperature (the surface of the steel plate obtains a bright and flat galvanized layer without plating leakage phenomenon).
Example 9:
a hot-dip galvanizing smokeless plating assistant comprises the following components:
TABLE 9 composition table of hot-dip galvanizing smokeless plating assistant
| Components | Mass percent (%) |
| Zinc sulfate | 2 |
| Ammonium sulfate | 4 |
| Potassium sulfate | 1 |
| Magnesium sulfate | 3 |
| Nickel fluoride | 0.1 |
| Disodium hydroxyethylidene diphosphonate | 0.3 |
| N-dodecyl dimethyl betaine | 0.05 |
| Water (W) | 89.55 |
A hot dip galvanising method comprising the steps of:
the pH value of the hot-dip galvanizing smokeless plating assistant is adjusted to 5 by using industrial sulfuric acid with the mass fraction of 98 percent, then a steel plate which is subjected to degreasing and degreasing treatment and pickling rust removal treatment is immersed into the plating assistant for plating for 70s at the temperature of 60 ℃, then the steel plate is taken out and dried at the temperature of 80 ℃, is immersed into a zinc solution for plating for 60s at the temperature of 450 ℃ (no smoke and little scum are generated in the dipping process), and then the steel plate is taken out and cooled to room temperature (the surface of the steel plate obtains a bright and flat galvanized layer without plating leakage phenomenon).
Example 10:
a hot-dip galvanizing smokeless plating assistant comprises the following components:
TABLE 10 composition table of smokeless plating assistant for hot dip galvanizing
| Components | Mass percent (%) |
| Zinc sulfate | 3 |
| Ammonium sulfate | 3 |
| Sodium sulfate | 3 |
| Potassium sulfate | 3 |
| Sodium fluoride | 0.1 |
| Disodium hydroxyethylidene diphosphonate | 0.1 |
| Hexamethylenetetramine | 0.1 |
| Benzotriazole compounds | 0.1 |
| Fatty alcohol polyoxyethylene ether | 0.03 |
| Dioctadecyl dimethyl ammonium chloride | 0.02 |
| Sodium dodecyl sulfate | 0.04 |
| Water (W) | 87.51 |
A hot dip galvanising method comprising the steps of:
the pH value of the hot-dip galvanizing smokeless plating assistant is adjusted to 4.5 by industrial sulfuric acid with the mass fraction of 98 percent, then a steel plate which is subjected to degreasing and degreasing treatment and acid cleaning and rust removing treatment is immersed into the plating assistant for plating for 60s at 50 ℃, then the steel plate is taken out and dried at 80 ℃, is immersed into zinc liquid at 450 ℃ for 60s (no smoke and little scum are generated in the dipping process), and then the steel plate is taken out and cooled to room temperature (the surface of the steel plate obtains a bright and flat galvanized layer without plating leakage phenomenon).
Example 11:
a hot-dip galvanising smokeless flux having the composition given in the following table:
TABLE 11 composition table of smokeless plating assistant for hot dip galvanizing
A hot dip galvanising method comprising the steps of:
the pH value of the hot-dip galvanizing smokeless plating assistant is adjusted to 4.5 by industrial sulfuric acid with the mass fraction of 98 percent, then a steel plate which is subjected to degreasing and degreasing treatment and pickling rust removal treatment is immersed into the plating assistant for plating for 10s at 70 ℃, then the steel plate is taken out and dried at 80 ℃, is immersed into zinc liquid at 450 ℃ for 60s (no smoke and less scum are generated in the dipping process), and then the steel plate is taken out and cooled to room temperature (the surface of the steel plate obtains a bright and flat galvanized layer without plating leakage phenomenon).
Example 12:
a hot-dip galvanizing smokeless plating assistant comprises the following components:
TABLE 12 composition table of smokeless plating assistant for hot dip galvanizing
| Components | Mass percent (%) |
| Zinc sulfate | 2 |
| Ammonium sulfate | 10 |
| Magnesium sulfate | 1 |
| Manganese sulfate | 2 |
| Sodium fluoride | 0.1 |
| Potassium fluoride | 0.1 |
| Ammonium fluoride | 0.1 |
| Disodium hydroxyethylidene diphosphonate | 0.3 |
| N-dodecyl dimethyl betaine | 1.5 |
| Fatty alcohol polyoxyethylene ether | 1.5 |
| Water (W) | 81.4 |
A hot dip galvanising method comprising the steps of:
the pH value of the hot-dip galvanizing smokeless plating assistant is adjusted to 4.5 by industrial sulfuric acid with the mass fraction of 98 percent, then a steel plate which is subjected to degreasing and degreasing treatment and pickling rust removal treatment is immersed into the plating assistant for plating for 20s at the temperature of 60 ℃, then the steel plate is taken out and dried at the temperature of 80 ℃, is immersed into zinc liquid at the temperature of 450 ℃ for 60s (no smoke and less scum are generated in the dipping process), and then the steel plate is taken out and cooled to room temperature (the surface of the steel plate obtains a bright and flat galvanized layer without plating leakage phenomenon).
Comparative example 1:
a hot-dip galvanization assistant, the composition of which is shown in the following table:
TABLE 13 composition table of hot-dip galvanizing plating assistant
| Components | Mass percent (%) |
| Zinc chloride | 12 |
| Ammonium chloride | 14 |
| Water (I) | 74 |
A hot dip galvanising method comprising the steps of:
immersing the steel plate after degreasing and degreasing treatment and acid cleaning and rust removing treatment into the hot-dip galvanizing plating assistant agent for plating assistant for 60s at 60 ℃, taking out the steel plate and drying at 80 ℃, then the steel plate is immersed in zinc liquid at 450 ℃ for 60s (a large amount of smog is generated in the immersion plating process, the scum amount is large), and then the steel plate is taken out and cooled to room temperature (a bright and flat zinc coating is obtained on the surface of the steel plate, and the plating leakage phenomenon is avoided).
Comparative example 2:
a hot-dip galvanization assistant, the composition of which is shown in the following table:
TABLE 14 composition table of hot-dip galvanizing plating assistant
| Components | Mass percent (%) |
| Zinc sulfate | 2 |
| Ammonium sulfate | 12 |
| Sodium sulfate | 1 |
| Potassium fluoride | 0.5 |
| Benzotriazoles | 0.2 |
| Dioctadecyl dimethyl ammonium chloride | 2 |
| Water (W) | 82.3 |
A hot dip galvanising method comprising the steps of:
the pH value of the hot-dip galvanizing plating assistant is adjusted to 3.5 by industrial sulfuric acid with the mass fraction of 98%, then a steel plate which is subjected to degreasing and degreasing treatment and pickling and rust removal treatment is immersed in the plating assistant for 90s at 40 ℃, then the steel plate is taken out and dried at 80 ℃, is immersed in zinc liquid at 450 ℃ for 60s (no smoke and less scum are generated in the dipping process), and then the steel plate is taken out and cooled to room temperature (incomplete and rough zinc layer on the surface of the steel plate, about 70% of area is missed plating).
Comparative example 3:
a hot-dip galvanizing flux, the composition of which is shown in the following table:
TABLE 15 composition table of hot-dip galvanizing plating assistant
| Components | Mass percent (%) |
| Zinc sulfate | 2 |
| Ammonium sulfate | 3 |
| Potassium sulfate | 5 |
| Aluminium sulphate | 5 |
| Sodium fluoride | 1 |
| Imidazoline | 0.1 |
| Fatty alcohol polyoxyethylene ether | 1 |
| Water (I) | 82.9 |
A hot dip galvanising method comprising the steps of:
the pH value of the hot-dip galvanizing plating assistant is adjusted to 5.5 by using industrial sulfuric acid with the mass fraction of 98%, then a steel plate which is subjected to degreasing and degreasing treatment and acid pickling rust removal treatment is immersed into the plating assistant for 180s at 25 ℃, then the steel plate is taken out and dried at 80 ℃, is immersed into a zinc solution at 450 ℃ for 60s (no smoke and a small amount of scum are generated in the immersion plating process), and is cooled to room temperature after being taken out (the surface of the steel plate has incomplete and rough zinc layers and about 60% of area is subjected to skip plating).
Comparative example 4:
a hot-dip galvanization assistant, the composition of which is shown in the following table:
TABLE 16 composition table of hot-dip galvanizing plating assistant
| Components | Mass percent (%) |
| Zinc sulfate | 10 |
| Ammonium sulfate | 8 |
| Sodium sulfate | 5 |
| Sodium fluoride | 1 |
| Imidazoline | 0.1 |
| Sodium dodecyl sulfate | 0.05 |
| Alkyl glycosides | 0.05 |
| Water (I) | 75.8 |
A hot dip galvanising method comprising the steps of:
the pH value of the hot-dip galvanizing plating assistant is adjusted to 4.5 by industrial sulfuric acid with the mass fraction of 98%, then a steel plate which is subjected to degreasing and degreasing treatment and pickling and rust removal treatment is immersed in the plating assistant for 60 seconds at the temperature of 60 ℃, then the steel plate is taken out and dried at the temperature of 80 ℃, is immersed in a zinc solution for 60 seconds at the temperature of 450 ℃ (no smoke and more scum are generated in the dipping process), and then the steel plate is taken out and cooled to room temperature (the surface of the steel plate has incomplete and rough zinc layers and about 50% area of plating leakage).
Comparative example 5:
a hot-dip galvanization assistant, the composition of which is shown in the following table:
TABLE 17 composition table of hot-dip galvanizing plating assistant
| Components | Mass percent (%) |
| Zinc sulfate | 3 |
| Ammonium sulfate | 9 |
| Manganese sulfate | 1 |
| Copper sulfate | 1 |
| Potassium fluoride | 0.4 |
| Benzotriazoles | 0.2 |
| Water (I) | 85.4 |
A hot dip galvanising method comprising the steps of:
the pH value of the hot-dip galvanizing plating assistant is adjusted to 3.5 by industrial sulfuric acid with the mass fraction of 98%, then a steel plate which is subjected to degreasing and degreasing treatment and pickling and rust removal treatment is immersed into the plating assistant for plating for 120s at 65 ℃, then the steel plate is taken out and dried at 80 ℃, is immersed into a zinc solution at 450 ℃ for 60s (no smoke and less scum are generated in the dipping process), and then the steel plate is taken out and cooled to room temperature (incomplete and rough zinc layer on the surface of the steel plate, about 60% of area of plating leakage).
Comparative example 6:
a hot-dip galvanizing flux, the composition of which is shown in the following table:
TABLE 18 composition table of hot-dip galvanizing flux
| Components | Mass percent (%) |
| Zinc sulfate | 3 |
| Ammonium sulfate | 3 |
| Sodium sulfate | 3 |
| Potassium sulfate | 3 |
| Hydroxy ethylidene diphosphonic acid disodium salt | 0.1 |
| Hexamethylenetetramine | 0.1 |
| Benzotriazoles | 0.1 |
| Fatty alcohol polyoxyethylene ether | 0.03 |
| Dioctadecyl dimethyl ammonium chloride | 0.02 |
| Sodium dodecyl sulfate | 0.04 |
| Water (I) | 87.61 |
A hot dip galvanising method comprising the steps of:
the pH value of the hot-dip galvanizing plating assistant is adjusted to 4.5 by industrial sulfuric acid with the mass fraction of 98%, then a steel plate which is subjected to degreasing and degreasing treatment and pickling and rust removal treatment is immersed in the plating assistant for plating for 60s at 50 ℃, then the steel plate is taken out and dried at 80 ℃, is immersed in zinc liquid at 450 ℃ for 60s (no smoke and little scum are generated in the dipping process), and then the steel plate is taken out and cooled to room temperature (incomplete and rough zinc layer on the surface of the steel plate, about 40% of area is missed plating).
Note:
the plating assistant and the dipping effect of the hot dip galvanizing plating assistant of examples 1 to 12 and comparative examples 1 to 6 are summarized as follows:
TABLE 19 summary of plating assistant and plating effect of the hot-dip galvanizing plating assistant of examples 1 to 12 and comparative examples 1 to 6
As can be seen from table 19: the hot-dip galvanizing assistant of the embodiment 1 to 12 generates no smoke completely in the hot-dip galvanizing process, has good galvanizing effect and is suitable for large-scale industrial application.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. The hot-dip galvanizing smokeless plating assistant is characterized by comprising the following components in percentage by mass:
sulfate salt: 5% -15%;
a stabilizer: 0.1 to 1 percent;
corrosion inhibitor: 0.1 to 0.5 percent;
surfactant (b): 0.05 to 3 percent;
water: and (4) the balance.
2. The hot dip galvanizing smokeless flux assistant of claim 1, wherein: the sulfate is at least two of zinc sulfate, ammonium sulfate, sodium sulfate, potassium sulfate, aluminum sulfate, magnesium sulfate, manganese sulfate and copper sulfate, and must contain zinc sulfate and ammonium sulfate.
3. The hot-dip galvanization smokeless flux aid according to claim 2, characterized in that: the total mass percentage content of the zinc sulfate and the ammonium sulfate in the sulfate is more than or equal to 50 percent.
4. The hot-dip galvanization smokeless flux aid according to claim 3, characterized in that: the mass ratio of the zinc sulfate to the ammonium sulfate is 1-5.
5. The hot dip galvanizing smokeless flux assistant according to any one of claims 1 to 4, characterized in that: the stabilizer is at least one of sodium fluoride, potassium fluoride, ammonium bifluoride and nickel fluoride.
6. The hot dip galvanizing smokeless flux assistant according to any one of claims 1 to 4, characterized in that: the corrosion inhibitor is at least one of hydroxyl ethylidene diphosphonic acid disodium, hexamethylenetetramine, benzotriazole and imidazoline.
7. The hot dip galvanizing smokeless flux assistant according to any one of claims 1 to 4, characterized in that: the surfactant is at least one of N-dodecyl dimethyl betaine, fatty alcohol-polyoxyethylene ether, dioctadecyl dimethyl ammonium chloride, lauryl sodium sulfate, phosphate and alkyl glycoside.
8. A hot-dip galvanizing method, characterized in that the plating assistant used in the plating assistant process is the hot-dip galvanizing smokeless plating assistant according to any one of claims 1 to 7.
9. The hot dip galvanizing process of claim 8, including the steps of: adjusting the pH value of the plating assistant agent to 3.5-5.5, immersing the steel plated piece subjected to oil removal treatment and rust removal treatment into the plating assistant agent for plating assistant, taking out the steel plated piece, drying, immersing into zinc liquid for plating, and taking out the steel plated piece.
10. The hot-dip galvanizing process of claim 9, wherein: the plating assistant is carried out at the temperature of 20-80 ℃, and the plating assistant time is 10-180 s.
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