CN100497717C - Hot dip galvanizing method for steel pieces - Google Patents
Hot dip galvanizing method for steel pieces Download PDFInfo
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- CN100497717C CN100497717C CNB2007100252229A CN200710025222A CN100497717C CN 100497717 C CN100497717 C CN 100497717C CN B2007100252229 A CNB2007100252229 A CN B2007100252229A CN 200710025222 A CN200710025222 A CN 200710025222A CN 100497717 C CN100497717 C CN 100497717C
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- 238000005246 galvanizing Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 38
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 25
- 239000010959 steel Substances 0.000 title claims abstract description 25
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 37
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 18
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 17
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 9
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 8
- 238000005238 degreasing Methods 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 4
- 238000007747 plating Methods 0.000 claims description 48
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 36
- 239000011701 zinc Substances 0.000 claims description 36
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 16
- 239000004411 aluminium Substances 0.000 claims description 15
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 14
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 claims description 14
- 238000005554 pickling Methods 0.000 claims description 10
- 150000002910 rare earth metals Chemical class 0.000 claims description 9
- 235000019270 ammonium chloride Nutrition 0.000 claims description 7
- 238000007689 inspection Methods 0.000 claims description 7
- -1 rare earth chloride Chemical class 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 7
- 239000011592 zinc chloride Substances 0.000 claims description 7
- 235000005074 zinc chloride Nutrition 0.000 claims description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000007654 immersion Methods 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 4
- 229910052706 scandium Inorganic materials 0.000 claims description 3
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 claims description 3
- 229910052712 strontium Inorganic materials 0.000 claims description 2
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims description 2
- 239000011573 trace mineral Substances 0.000 claims description 2
- 235000013619 trace mineral Nutrition 0.000 claims description 2
- 239000002253 acid Substances 0.000 abstract description 5
- 229910000640 Fe alloy Inorganic materials 0.000 abstract description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 abstract description 2
- 239000008397 galvanized steel Substances 0.000 abstract description 2
- 238000001035 drying Methods 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 description 24
- 238000000576 coating method Methods 0.000 description 24
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 11
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 229910001297 Zn alloy Inorganic materials 0.000 description 7
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 description 7
- 239000002893 slag Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- 235000021110 pickles Nutrition 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 1
- 229910000655 Killed steel Inorganic materials 0.000 description 1
- FJMNNXLGOUYVHO-UHFFFAOYSA-N aluminum zinc Chemical compound [Al].[Zn] FJMNNXLGOUYVHO-UHFFFAOYSA-N 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 229910001651 emery Inorganic materials 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 229960004887 ferric hydroxide Drugs 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000007716 flux method Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- KFZAUHNPPZCSCR-UHFFFAOYSA-N iron zinc Chemical compound [Fe].[Zn] KFZAUHNPPZCSCR-UHFFFAOYSA-N 0.000 description 1
- IEECXTSVVFWGSE-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Fe+3] IEECXTSVVFWGSE-UHFFFAOYSA-M 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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- Coating With Molten Metal (AREA)
Abstract
This invention discloses a method for hot-dip galvanizing on steel work piece. The method comprises: checking black work piece, suspending, degreasing, rinsing, washing with acid, rinsing, treating with a galvanizing aid, drying with hot air, hot-dip galvanizing and cooling. During the hot-dip galvanizing process, Al, Ni, Si and rare earth element are added into the galvanizing solution. The galvanizing solution comprises: Al 7-9 wt. %, Ni 3-6 wt. %, Si 0.5-0.8 wt. %, rare earth element 0.5-1.0 wt. %, and Zn as balance. The addition of Si can reduce Fe content in the galvanizing solution, and the formation of Zn-Fe alloy residue. The Zn consumption is lowered by nearly 1%, and the surface quality of galvanized steel is improved.
Description
Technical field
The present invention relates to the hot dip galvanizing method in the field of metallurgy, especially the hot dip galvanizing method of steel part.
Background technology
The coating for protection against corrosion of steel product mainly contains different coating systems such as electro-galvanizing, galvanizing, aluminium, aluminium zinc, in steel piece coating surface corrosion resistant coating, matrix metal is protected.The galvanizing of steel part (comprising plate golding aluminium zinc alloy) method has been a kind of routine and method commonly used: main with the member that is coated with equipment such as bridge, power communication equipment, oil metallurgy.But corrosion of coating aggravates day by day, and the erosion resistance of monometallic coating, particularly zinc coating and work-ing life can't be satisfied the material protection requirement.For corrosion resistance nature aluminium zinc or aluminium-zinc alloy preferably, be not easy to reach the ideal technology condition, the existing zinc-base plating bath that contains 5% aluminium is to be under the zinc one aluminium eutectic composition condition, fusing point only is about 380 ℃, the liquid metal surface tension is little, sometimes also need to come coating is thickeied, to reach the thickness requirement to coating of technological standard defined.At aluminium zinc in the past, during the al-zn alloy coating plating is produced, the adding of rare earth metal has been arranged, it is wetting mainly to be that matrix surface to plating metal carries out, to prevent to occur in the plating process defective such as plating leakage.
CN1389588 hot galvanized steel pipe and production method, pending steel pipe two ends place to take out behind the certain hour in the Thermal zinc plating bath that fills fusing zinc under the clamping of the pipe clamp of hollow and can obtain this product.
The CN1033198 heat zinc coating auxiliary agent, the invention provides a kind of is parent with the chlorine root, contains the complex compound of chemical elements such as zinc, nitrogen and boron, as the plating assistant agent in the pot galvanize operation, can make workpiece in the immersion plating process, realize the zinc coating of fine texture within one minute.
When CN1295627 hot galvanizing method and device disclose pot galvanize, the plating container of storing molten metal is divided into coating bath and removes slag chute, steel band is immersed in the bath of molten metal of coating bath and carries out pot galvanize, the bath of molten metal of coating bath is carried to removing slag chute, cadmia in removing slag chute removal bath of molten metal makes the bath of molten metal except that slag chute return coating bath by the opening that is provided with on the coating bath.The plating device comprises: coating bath, remove slag chute, the bath of molten metal of coating bath to removing the e Foerderanlage that slag chute is carried.
CN1974834 is used for the quickening liquid integrated conduct method and the device of galvanization production line, and this method is plated to branch to helping plating liquor to carry out self-purging and utilizing the waste material that produces in the hot galvanizing process to produce automatically to replenish to help in the galvanization production line.To help continuously during enforcement in the coating bath in the solution suction treatment tank, and simultaneously with the solution in dezincify groove, the flue dust jar in volume pump suction jar, automatically controlling ammoniacal liquor by the pH TT﹠C system adds, and blast air, utilize airborne oxygen with the oxidation of divalent ferric iron in the solution, form ferric hydroxide precipitate.
CN1392284 iron and steel hot dip aluminum plating zinc alloy technology before this technology is hot dip process, helps plating to handle with passivator solution to steel part; During hot dip process, in the aluminium-zinc alloy plating bath, add the oxidation-resistant alloy of trace.A CN1442503 flux method hot dip process low aluminium zinc alloy aqueous fusion agent and using method thereof, iron salt concentration is controlled at 3～10 grams per liters, the solids component ratio is by solid amount 300 grams per liters in the prescription, the massfraction that its proportioning is formed is: zinc chloride 70%～80%, ammonium chloride 8～10%, Cerium II Chloride 4～10%.
But the improved plan that pair further improvement of aluminium zinc-base plating bath and aluminum-zinc alloy processing condition are not arranged.
Summary of the invention
The present invention seeks to: in order to optimize the quality and the effect of processing condition and raising galvanized workpiece, a kind of hot dip galvanizing method of realizing more satisfactory processing condition steel part is proposed, the existing zinc-base plating bath that contains about 5% aluminium is improved, the employing multi-element metal comprises the galvanizing of the adding steel part of rare earth metal, and the hot-dip galvanizing technique of steel part is improved.
The hot dip galvanizing method of steel part, the hot dip galvanizing method of steel part, the typical process flow that it is characterized in that galvanizing is: black part inspection, bridging, degreasing, rinsing, pickling, rinsing, plating assistant agent processing, hot-air dry, galvanizing, cooling, the stage of galvanizing is added aluminium, nickel, four kinds of new hot-dip galvanizing techniques of trace element formation of rare earth in zinc liquid, zinc-base, the content of aluminium (weight ratio) is: 7-9%; Nickel 3-6%; Silicon 0.5-0.8%, rare earth 0.5-1.0%; Surplus is zinc.Can also on the basis of above-mentioned alloy, add: scandium or strontium 0.5-1.0% (weight ratio); The stability of zinc plating bath is better.
The hot dip galvanizing method of steel part, plating assistant agent are the aqueous solution of zinc chloride, ammonium chloride and rare-earth salts preparation.62 ℃-75 ℃ of working temperatures, the ratio of zinc chloride and ammonium chloride solid content is for 2:3.ZnCL2 content should remain on 8～10% in the plating assistant agent, and NH4CL content should remain on 12～15% concentration ranges.Rare-earth salts (rare earth chloride) addition is whole plating assistant agent solid content 1-2%.
The working temperature of galvanizing zinc liquid is 436 ℃-450 ℃.After treating that the intensification of zinc liquid reaches operating temperature range, could begin zinc-plated.Shutdown period should be incubated.Temperature is 425 ℃-435 ℃.The immersion plating time, the speed that plating piece proposes the zinc pot was: ≈ 1.6M/Min at 1 minute 30 seconds-3 minutes; Farm labourer's part angle that takes the dish out of the pot reaches the 30-45 degree.
Characteristics of the present invention are: higher aluminium content can reduce the zinc consumption, in the anticorrosion life-span of improving galvanized alloy, improves zinc-plated visual appearance and the uniformity coefficient that improves coating.The effect of aluminium in the zinc liquid: aluminium and iron form five calorizes, two iron, and are better than zinc and combine with iron, thereby play inhibition, and aluminium has the effect that purifies zinc liquid in addition, remove iron, improve the homogeneity of coating, but the aluminium too high levels can cause plating leakage.The effect of nickel: the effect of nickel can suppress killed steel speed of response in heating immersion plating zinc process by forming fine and close coating, reduces the inequality of the zinc-plated appearance luster of these type of steel, can improve the flowability of zinc liquid in addition; The effect of rare earth: the adding of rare earth has only improved the flowability of zinc liquid, improves the surface quality of coating, and is more smooth, even, and erosion resistance strengthens.The effect of silicon: the adding of silicon can reduce the content of the iron in the zinc liquid, suppresses the formation of zinc-iron alloy slag body, reduces zinc consumption 1% nearly, and surface quality improves.
Embodiment
The embodiment of proportioning of the present invention all has good effect:
1 2 3 4 5 6 7 8 9 10 11 12
Aluminium: 7% 8% 7% 9% 8% 8% 9% 7% 7% 9% 7% 9%
Nickel: 3% 3% 4% 6% 3% 5% 6% 3% 5% 6% 3% 4%
Silicon: 0.5% 0.5% 0.7% 0.5% 0.6% 0.7% 0.5% 0.8% 0.7% 0.5% 0.8% 0.5%
Rare earth: 1.0%0.8% 1% 1% 0.8% 0.8% 0.8% 1.0% 0.8% 1% 0.8% 1%
Scandium: 0.5% 0.8% 1.0%
Zinc: surplus:
The above-mentioned alloy proportion of the present invention (beyond the dezincification) is made according to the above ratio and is added (by proportioning of the present invention) in alloy and the zinc liquid after alloy block (about every 5 kilograms) melts zinc.
The typical process flow of galvanizing is: black part inspection, bridging, degreasing, rinsing, pickling, rinsing, plating assistant agent processing, hot-air dry, galvanizing, cooling, and comprise discharging, quality inspection etc.
Black part inspection: the workpiece that need is carried out galvanizing should be deceived part (work in-process before the plating) inspection;
Bridging: suspension member;
Degreasing and rinsing: degreasing fluid is the aqueous solution of sodium hydroxide (N α OH is commonly called as caustic soda); Working concentration: 50-100 grams per liter; Working temperature: 60 ℃-80 ℃.The plating piece skimming treatment time is 10-15 minute, and to the mineral substance that the surface can not be removed with skim soln, synthetic resins, the plating piece of pollutents such as pitch should adopt other special methods to remove.Rinsing: the plating piece after the degreasing must rinsing in the mobile clear water, and rinse water should keep clean, and its pH value must not surpass 9.
Pickling and rinsing: (1) pickle solution is aqueous hydrochloric acid (HCL), and working concentration is the 50-160 grams per liter, and (2) pickle solution is chemically examined every day twice, and measurement result is announced on nameplate to instruct pickling operator work.(3) the pickling time should decide according to plating piece surface oxide layer situation and acid strength, digs acid
In the operation, be fast reaction speed, go here and there plating piece up and down moving two to three times in the acid cleaning process groove (4), and propose liquid level inspection pickling quality.To plating the not clean surperficial available emery wheel of pickling of Tan part, pickling was clean again after instruments such as wire brush were removed.(5) the qualified plating piece of pickling must enter Bo and washes technology and wash through flowing water.
Plating assistant agent is handled: plating assistant agent is the far or indistinct ZnCL2 of zinc chloride, ammonium chloride, NH4CL) aqueous solution of preparation.62 ℃-75 ℃ of working temperatures, the ratio of zinc chloride and ammonium chloride is for 2:3.ZnCL2 content should remain on 8～10% in the plating assistant agent, and NH4CL content should remain on 12～15% concentration ranges, rare-earth salts
Rare earth chloride) addition is whole solid content 1-2%;
Dry back galvanizing: the working temperature of (1) zinc liquid is 436 ǎ-450 ℃.After treating that the intensification of zinc liquid reaches operating temperature range, could begin zinc-plated.Shutdown period should be incubated.Temperature is 425 ℃-435 ℃.
The immersion plating time (should suitably adjust) according to zinc pot temperature
Thickness of steel product＜5mm 1 minute 30 seconds-2 minutes
Thickness of steel product〉5mm 2 minutes-3 minutes
The speed that plating piece proposes the zinc pot is: ≈ 1.6M/Mi; Farm labourer's part angle that takes the dish out of the pot reaches the 30-45 degree as far as possible.
Aftertreatment:
(1) water cooling
Plating piece proposes should immerse cooling trough fast behind the zinc pot, and long part must the level immersion prevent bending.Cold water temperature must remain on below 60 ℃, and water quality is limpid, flow of water constant, pH=6～8.
(2) passivation
Contain passivator 2 grams per liters in the passivation aqueous solution, contain acetic acid 5ml/L.(solution preparation back check acid content, solution after the use when acidity reduces, need add the acetic acid adjustment, add significant proportion passivator simultaneously)
Claims (5)
1, the hot dip galvanizing method of steel part, the typical process flow that it is characterized in that galvanizing is: black part inspection, bridging, degreasing, rinsing, pickling, rinsing, plating assistant agent processing, hot-air dry, galvanizing, cooling, in zinc liquid, add aluminium, nickel, silicon, four kinds of new hot-dip galvanizing techniques of trace element formation of rare earth when it is characterized in that galvanizing, zinc-base, the content of aluminium is: 7-9%; Nickel 3-6%; Silicon 0.5-0.8%, rare earth 0.5-1.0%; Surplus is zinc, and content is weight ratio.
2, the hot dip galvanizing method of steel part according to claim 1 is characterized in that adding scandium or strontium 0.5-1.0%; Interpolation content is weight ratio, and the stability of zinc plating bath is better.
3, the hot dip galvanizing method of steel part according to claim 1 is characterized in that plating assistant agent was the aqueous solution of zinc chloride, ammonium chloride and rare earth chloride preparation when plating assistant agent was handled; 62 ℃-75 ℃ of working temperatures, zinc chloride is 2:3 with the ratio of ammonium chloride solid content; ZnCl in the plating assistant agent
2Content remains on 8～10%, NH
4Cl content should remain on 12～15% concentration ranges; The rare-earth salts addition is whole plating assistant agent solid content 1-2wt%.
4, the hot dip galvanizing method of steel part according to claim 1, the working temperature that it is characterized in that galvanizing zinc liquid are 436 ℃-450 ℃, treat zinc liquid heat up reach operating temperature range after, could begin zinc-plated; The immersion plating time, the speed that plating piece proposes the zinc pot was: ≈ 1.6m/min at 1 minute 30 seconds-3 minutes.
5, the hot dip galvanizing method of steel part according to claim 4 is characterized in that farm labourer's part angle that takes the dish out of the pot reaches the 30-45 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100252229A CN100497717C (en) | 2007-07-18 | 2007-07-18 | Hot dip galvanizing method for steel pieces |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100252229A CN100497717C (en) | 2007-07-18 | 2007-07-18 | Hot dip galvanizing method for steel pieces |
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| CN101092682A CN101092682A (en) | 2007-12-26 |
| CN100497717C true CN100497717C (en) | 2009-06-10 |
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| CN110714178A (en) * | 2019-11-03 | 2020-01-21 | 江苏荣辉电力设备制造有限公司 | Hot galvanizing process for electric iron tower component |
| CN111304571A (en) * | 2019-12-31 | 2020-06-19 | 桐乡市铁盛线路器材有限公司 | Hot-dip galvanizing process for 35KV main transformer insulated steel pipe |
| CN111378904B (en) * | 2020-05-14 | 2021-03-26 | 太仓鑫祥金属制品有限公司 | Preparation process of corrosion-resistant ultrahigh-strength steel part for bending machine |
| CN115354192A (en) * | 2022-08-23 | 2022-11-18 | 辛集市澳森金属制品有限公司 | High-strength and high-toughness zinc-aluminum alloy galvanized wire and preparation method thereof |
| CN117989214A (en) * | 2024-04-07 | 2024-05-07 | 广东腐蚀科学与技术创新研究院 | Aluminized connecting fastener capable of preventing galvanic corrosion and manufacturing method thereof |
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