CN104227543A - Electrical heated tube roller burnishing treatment process capable of effectively cleaning skin scale of welding electrical heated tube - Google Patents
Electrical heated tube roller burnishing treatment process capable of effectively cleaning skin scale of welding electrical heated tube Download PDFInfo
- Publication number
- CN104227543A CN104227543A CN201410442492.XA CN201410442492A CN104227543A CN 104227543 A CN104227543 A CN 104227543A CN 201410442492 A CN201410442492 A CN 201410442492A CN 104227543 A CN104227543 A CN 104227543A
- Authority
- CN
- China
- Prior art keywords
- electrothermal tube
- heated tube
- tumbling
- electrical heated
- solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/10—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work
-
- 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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/48—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
-
- 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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/68—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous solutions with pH between 6 and 8
-
- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention relates to an electrical heated tube roller burnishing treatment process, which comprises the following steps of A, soaking an electrical heated tube into pure molten steel solution with the temperature of 65 DEG C for 12min, soaking in concentrated nitric acid solution for 5s, flushing, and cleaning the surface; B, carrying out burnishing treatment on the electrical heated tube subjected to burnishing pretreatment, soaking the burnished electrical heated tube into diluted citric acid solution with the temperature of 80 DEG C and the concentration of 5 percent for 5min, and flushing; C, carrying out passivating treatment on the electrical heated tube, and drying; during the passivating treatment, soaking the electrical heated tube into diluted nitric acid solution for 10s, soaking into corrosion inhibition solution for 10s, and filtering and flushing, wherein the corrosion inhibition solution is prepared by mixing potassium iodide, benzotriazole and water according to the mass ratio of 0.1:60:100. According to the process provided by the invention, welding scale, spots, stains and rusts on the surface of the electrical heated tube can be effectively cleaned, and the quality of plating the electrical heated tube is improved.
Description
The application is divisional application, the application number of original application: 201210481561.9, the applying date: 2012-11-23, denomination of invention: electrothermal tube tumbling treatment process.
Technical field
The present invention relates to a kind of chemically treated method in metal surface.
Background technology
Metal material needed first to carry out tumbling process before carrying out plating.Tumbling process is that bulk of components is made low speed rotation together with grinding medium in cylinder, and the process that light adorns process is carried out in the relative motion by part and abrasive material.In tumbling processing procedure, the normal wet method processing grinding medium used contains abrasive material, chemical promoter (brightener) and water.Good tumbling process can ensure the quality of plating effectively, prevents metal material by corrosion.Electrothermal tube is the workpiece worked under hot and humid environment for a long time, and during manufacture, there is weldering dirt metal surface, if removing surface does not totally directly carry out tumbling, plating, electric heating optical surface very easily gets rusty, and just cannot use once by corrosion.How providing a kind of tumbling treatment process of better effects if to carry out tumbling process to electrothermal tube, is the problem that those skilled in the art needs to solve.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind ofly effectively can clear up weldering dirt, spot, the stain on electrothermal tube surface and get rusty, the electrothermal tube tumbling treatment process that the quality of electrothermal tube plating is promoted to some extent.
In order to solve the problems of the technologies described above, the invention provides a kind of electrothermal tube tumbling treatment process, there are following steps:
A. tumbling pre-treatment is carried out to electrothermal tube;
White molten steel solution electrothermal tube first being put into 50 DEG C to 80 DEG C soaks 6min to 12min, then puts into concentrated nitric acid solution and soak 4s to 6s, and then rinse, effects on surface is cleared up; Described white molten steel solution be by concentration be 12% white molten steel and clear water according to 12 to 16: 100 mass ratio configure;
B. tumbling process is carried out to the electrothermal tube through tumbling pre-treatment, then the electrothermal tube after tumbling is put into rare citric acid solution that temperature is more than or equal to 80 DEG C and soak 3min to 5min, then rinse;
C. Passivation Treatment carried out to electrothermal tube and dry; During described Passivation Treatment, first electrothermal tube is put into dilute nitric acid solution and soak 8s to 12s, then put into corrosion inhibiting solution and soak 8s to 12s, then filter cleaning; Described corrosion inhibiting solution be by KI, BTA and water according to 0.08 to 0.12: 55 to 65: 100 mass ratio configure.
In order to the tumbling better effects if of electrothermal tube, thus obtain better anticorrosion effect, a kind of preferred technical scheme is: the tumbling process in above-mentioned steps B is that electrothermal tube is put into cleaning mill, adds steel ball and electrothermal tube covers by clear water completely; Add the polishing agent of 160g to 200g and the citric acid powder of 80g to 120g before tumbling starts, tumbling 10min to 20min, tumbling proceeds to a half, again adds the polishing agent of 160g to 200g and the citric acid powder of 80g to 120g.Adding brightener at twice can make the amount of brightener in whole tumbling processes be all sufficient, is conducive to the quality ensureing tumbling.
In order to the Passivation Treatment of electrothermal tube is later better dry, ensure anticorrosion effect, a kind of preferred technical scheme is: the drying in above-mentioned steps C is that electrothermal tube is put into spin dryer tube, and spin dryer tube heating-up temperature is 60 DEG C to 70 DEG C, dries 5min to 10min.
In order to the pickling effect of electrothermal tube before tumbling is better, and the better effects if of Passivation Treatment, a kind of preferred technical scheme is: above-mentioned concentrated nitric acid solution be by concentration be 70% nitric acid and water according to 65 to 75: 25 to 35 mass ratio configure; Described dilute nitric acid solution be by concentration be 11% nitric acid and water according to 11 to 15: 100 mass ratio configure.
The present invention has positive effect: electrothermal tube tumbling treatment process of the present invention carries out pickling de-sludging process to electrothermal tube before tumbling, successively soak in white molten steel and red fuming nitric acid (RFNA), before tumbling, fully can remove the weldering dirt on electrothermal tube surface, be conducive to the effect promoting tumbling process.Electrothermal tube tumbling treatment process of the present invention carries out pickling with rare citric acid solution immediately after tumbling, and electrothermal tube surface can be made brighter, smooth, promotes the effect of tumbling process further.Electrothermal tube tumbling treatment process of the present invention, when passivation, successively soaks, can make the corrosion resistance of electrothermal tube, oxidative resistance improves greatly in dilute nitric acid solution and inhibiting solution.Through the electrothermal tube of present invention process process, the salt spray test of 48h can be smoothly through very much, there will not be the phenomenon of corrosion, be conducive to the quality promoting electrothermal tube plating, the service life of electrothermal tube is obviously extended.
Detailed description of the invention
(embodiment 1)
The concrete steps of the electrothermal tube tumbling treatment process of the present embodiment are as follows:
A. tumbling pre-treatment:
The white molten steel solution that made by welding fabrication technique 50 electrothermal tubes first put into 65 DEG C is soaked 12min, then puts into concentrated nitric acid solution and soak 5s, then rinse with clear water, and effects on surface is cleared up.After process, electrothermal tube appearance turns white, and welds dirty available toothbrush and brushes off.
Bai Gangshui solution be by concentration be 12% white molten steel and clear water according to 14: 100 mass ratio configure.The composition of Bai Gangshui is the nitric acid of the phosphoric acid of 30wt%, 10wt%, the hydrochloric acid of 15wt%, and all the other are water.Concentrated nitric acid solution be by concentration be 70% nitric acid and clear water according to 70: 30 mass ratio configure.
B. tumbling process and cleaning:
400 electrothermal tubes through tumbling pre-treatment are put into cleaning mill, adds steel ball and electrothermal tube covers by clear water completely.Add the polishing agent of 180g and the citric acid powder of 100g before tumbling starts, tumbling 15min, tumbling proceeds to a half, again adds the polishing agent of 180g and the citric acid powder of 100g.Then the electrothermal tube after tumbling is put into the citric acid solution that temperature is 80 DEG C, concentration is 5% and soak 5min, then rinse with clear water.After tumbling process, electrothermal tube surface-brightening, smooth, to be speckless, stain and getting rusty.The model that polishing agent adopts Xingxing Abrasive Co., Ltd., Huzhou to produce is LGL-5 stainless-steel grinding brightener.
C. passivation and drying:
Electrothermal tube through tumbling process is put into dilute nitric acid solution and soaks 10s, then put into corrosion inhibiting solution and soak 10s, then filter cleaning with clear water.Then cleaned 90 electrothermal tubes are put into spin dryer tube, spin dryer tube heating-up temperature is 60 DEG C, dries 10min.
Dilute nitric acid solution be by concentration be 11% nitric acid and clear water according to 13: 100 mass ratio configure.Corrosion inhibiting solution be by KI, BTA and clear water according to 0.1: 60: 100 mass ratio configure.
(embodiment 2)
The concrete steps of the electrothermal tube tumbling treatment process of the present embodiment are as follows:
A. tumbling pre-treatment:
The white molten steel solution that made by welding fabrication technique 50 electrothermal tubes first put into 50 DEG C is soaked 6min, then puts into concentrated nitric acid solution and soak 5s, then rinse with clear water, and effects on surface is cleared up.
Bai Gangshui solution be by concentration be 12% white molten steel and clear water according to 12: 100 mass ratio configure.Concentrated nitric acid solution be by concentration be 70% nitric acid and clear water according to 65: 35 mass ratio configure.
B. tumbling process and cleaning:
400 electrothermal tubes through tumbling pre-treatment are put into cleaning mill, adds steel ball and electrothermal tube covers by clear water completely.Add the polishing agent of 160g and the citric acid powder of 80g before tumbling starts, tumbling 12min, tumbling proceeds to a half, again adds the polishing agent of 160g and the citric acid powder of 80g.Then the electrothermal tube after tumbling is put into the citric acid solution that temperature is 100 DEG C, concentration is 5% and soak 3min, then rinse with clear water.
C. passivation and drying:
Electrothermal tube through tumbling process is put into dilute nitric acid solution and soaks 8s, then put into corrosion inhibiting solution and soak 8s, then filter cleaning with clear water.Then cleaned 90 electrothermal tubes are put into spin dryer tube, spin dryer tube heating-up temperature is 70 DEG C, dries 5min.
Dilute nitric acid solution be by concentration be 11% nitric acid and clear water according to 11: 100 mass ratio configure.Corrosion inhibiting solution be by KI, BTA and clear water according to 0.08: 55: 100 mass ratio configure.
(embodiment 3)
The concrete steps of the electrothermal tube tumbling treatment process of the present embodiment are as follows:
A. tumbling pre-treatment:
The white molten steel solution that made by welding fabrication technique 50 electrothermal tubes first put into 80 DEG C is soaked 8min, then puts into concentrated nitric acid solution and soak 5s, then rinse with clear water, and effects on surface is cleared up.
Bai Gangshui solution be by concentration be 12% white molten steel and clear water according to 16: 100 mass ratio configure.Concentrated nitric acid solution be by concentration be 70% nitric acid and clear water according to 75: 25 mass ratio configure.
B. tumbling process and cleaning:
400 electrothermal tubes through tumbling pre-treatment are put into cleaning mill, adds steel ball and electrothermal tube covers by clear water completely.Add the polishing agent of 200g and the citric acid powder of 120g before tumbling starts, tumbling 18min, tumbling proceeds to a half, again adds the polishing agent of 200g and the citric acid powder of 120g.Then the electrothermal tube after tumbling is put into the citric acid solution that temperature is 90 DEG C, concentration is 5% and soak 4min, then rinse with clear water.
C. passivation and drying:
Electrothermal tube through tumbling process is put into dilute nitric acid solution and soaks 12s, then put into corrosion inhibiting solution and soak 12s, then filter cleaning with clear water.Then cleaned 90 electrothermal tubes are put into spin dryer tube, spin dryer tube heating-up temperature is 65 DEG C, dries 8min.
Dilute nitric acid solution be by concentration be 11% nitric acid and clear water according to 15: 100 mass ratio configure.Corrosion inhibiting solution be by KI, BTA and clear water according to 0.12: 65: 100 mass ratio configure.
(comparative example 1)
The concrete steps of the electrothermal tube tumbling treatment process of this comparative example are as follows:
Electrothermal tube is put into cleaning mill, adds steel ball and electrothermal tube covers by clear water completely.And add the polishing agent of 350g, tumbling 15min, then rinse with clear water.Again electrothermal tube is put into dilute nitric acid solution to soak 10s and carry out passivation, then dry.
Carry out salt spray test respectively to the electrothermal tube of the tumbling treatment process through embodiment 1 to 3 and comparative example 1, sample is put into salt spray test chamber, adopt the NaCl solution of 5%, humidity is 80%, and temperature is 45 DEG C, continues spraying 24h, 48h and 96h.
Table 1 is the decay resistance table of comparisons of the electrothermal tube of embodiment 1 to 3 and comparative example 1
| The salt spray test time | Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example 1 |
| 24h | Without rust staining | Without rust staining | Without rust staining | Without rust staining |
| 48h | Without rust staining | Without rust staining | Without rust staining | A small amount of rust staining |
| 96h | Without rust staining | A small amount of rust staining | Without rust staining | A large amount of rust staining |
Claims (3)
1. an electrothermal tube treatment process, is characterized in that comprising:
A. tumbling pre-treatment is carried out to electrothermal tube;
White molten steel solution electrothermal tube first being put into 50 DEG C soaks 6 min, then puts into concentrated nitric acid solution and soak 5s, and then rinse, effects on surface is cleared up;
B. carry out tumbling process to the electrothermal tube through tumbling pre-treatment, the citric acid solution then electrothermal tube after tumbling being put into 100 DEG C soaks 3 min, then rinses;
C. Passivation Treatment carried out to electrothermal tube and dry; During described Passivation Treatment, first electrothermal tube is put into dilute nitric acid solution and soak 8s, then put into corrosion inhibiting solution and soak 8s, then filter cleaning; Described corrosion inhibiting solution be by KI, BTA and water according to 0.08: 55: 100 mass ratio configure.
2. according to the electrothermal tube treatment process described in claim 1, it is characterized in that: the drying in described step C is that electrothermal tube is put into spin dryer tube, spin dryer tube heating-up temperature is 60 DEG C, dries 10min.
3. an electrothermal tube, is characterized in that: this electrothermal tube treatment process according to claim 1 is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410442492.XA CN104227543A (en) | 2012-11-23 | 2012-11-23 | Electrical heated tube roller burnishing treatment process capable of effectively cleaning skin scale of welding electrical heated tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410442492.XA CN104227543A (en) | 2012-11-23 | 2012-11-23 | Electrical heated tube roller burnishing treatment process capable of effectively cleaning skin scale of welding electrical heated tube |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210481561.9A Division CN102941525B (en) | 2012-11-23 | 2012-11-23 | Electrothermal tube barrel burnishing process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104227543A true CN104227543A (en) | 2014-12-24 |
Family
ID=52216905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410442492.XA Pending CN104227543A (en) | 2012-11-23 | 2012-11-23 | Electrical heated tube roller burnishing treatment process capable of effectively cleaning skin scale of welding electrical heated tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104227543A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0813172A (en) * | 1994-06-29 | 1996-01-16 | Asahi Kagaku Kogyo Co Ltd | Corrosion inhibitory composition for organic acid pickling |
| JP2000096272A (en) * | 1998-07-24 | 2000-04-04 | Asahi Kagaku Kogyo Co Ltd | Corrosion inhibitor for acid washing of metal, washing solution composition containing same and method for washing metal using same |
| DE10043148A1 (en) * | 2000-08-31 | 2002-03-14 | Volkswagen Ag | Process for increasing the corrosion resistance of a workpiece made of titanium or titanium alloy contaminated with metallic iron comprises treating the workpiece with a pickling solution of concentrated nitric acid in concentrated ethanol |
| CN101275231A (en) * | 2008-05-27 | 2008-10-01 | 洛阳双瑞金属复合材料有限公司 | Method for spray pickling, polishing and passivating stainless steel composite board and devices thereof |
| EP2283969A1 (en) * | 2009-07-30 | 2011-02-16 | REM Technologies, Inc. | High throughput finishing of metal components |
| CN102653868A (en) * | 2012-03-14 | 2012-09-05 | 王福平 | Novel stainless steel acid-washing passivation liquid |
-
2012
- 2012-11-23 CN CN201410442492.XA patent/CN104227543A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0813172A (en) * | 1994-06-29 | 1996-01-16 | Asahi Kagaku Kogyo Co Ltd | Corrosion inhibitory composition for organic acid pickling |
| JP2000096272A (en) * | 1998-07-24 | 2000-04-04 | Asahi Kagaku Kogyo Co Ltd | Corrosion inhibitor for acid washing of metal, washing solution composition containing same and method for washing metal using same |
| DE10043148A1 (en) * | 2000-08-31 | 2002-03-14 | Volkswagen Ag | Process for increasing the corrosion resistance of a workpiece made of titanium or titanium alloy contaminated with metallic iron comprises treating the workpiece with a pickling solution of concentrated nitric acid in concentrated ethanol |
| CN101275231A (en) * | 2008-05-27 | 2008-10-01 | 洛阳双瑞金属复合材料有限公司 | Method for spray pickling, polishing and passivating stainless steel composite board and devices thereof |
| EP2283969A1 (en) * | 2009-07-30 | 2011-02-16 | REM Technologies, Inc. | High throughput finishing of metal components |
| CN102653868A (en) * | 2012-03-14 | 2012-09-05 | 王福平 | Novel stainless steel acid-washing passivation liquid |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104259978A (en) | Electrical heated tube tumbling process with passivating step | |
| CN105441952B (en) | A kind of metalwork processing of surface polishing | |
| CN105297045B (en) | A kind of stainless steel pipe surface cleaning method | |
| CN104762622B (en) | A kind of processing method of corronil tubing surface-brightening | |
| CN108977874A (en) | A kind of two phase stainless steel annealing and pickling method | |
| CN105239065A (en) | Aluminum board purifying process | |
| CN102941525B (en) | Electrothermal tube barrel burnishing process | |
| CN109940061A (en) | A kind of wire-rod roll pickling free drawing production technology | |
| CN104593790A (en) | Powder for removing surface stains of silverware | |
| CN109811334A (en) | A kind of environment-friendly type metal surface treatment process | |
| CN101104918A (en) | Method for modifying copper-aluminum metallurgy combination interface by auxiliary coating agent | |
| CN104325384A (en) | Electrical heated tube treatment process with good barreling effect | |
| CN108330520A (en) | A kind of galvanized steel plain sheet of heat resistance, corrosion resistance, high weldability | |
| CN104227543A (en) | Electrical heated tube roller burnishing treatment process capable of effectively cleaning skin scale of welding electrical heated tube | |
| CN104259977A (en) | Electric heating tube roll finish treatment process capable of prolonging service life of electric heating tube | |
| CN104308713A (en) | Tumbling process | |
| CN104259976A (en) | Electrical heated tube processing technology good in plating quality and corrosion property | |
| CN106086904A (en) | A kind of steel construction derusting anti-corrosive method | |
| CN104149015A (en) | Electric heating pipe roller burnishing treatment process | |
| CN104149014A (en) | Tubular electric heating element tumbling technology capable of improving plating quality of tubular electric heating element | |
| CN104404551A (en) | Stainless steel acid pickling technology | |
| CN111020553A (en) | Surface treatment method of hot-rolled ribbed steel bar | |
| CN104149016A (en) | Treatment process for electric heating pipe | |
| CN104149017A (en) | Tubular electric heating element tumbling technology capable of improving corrosion resistance of tubular electric heating element | |
| CN111297046A (en) | Preparation method of paint brush |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141224 |
|
| RJ01 | Rejection of invention patent application after publication |