CN100476032C - Chemical passivation method for enhancing corrosion resistance of continuous annealing IF steel cold rolling plate - Google Patents
Chemical passivation method for enhancing corrosion resistance of continuous annealing IF steel cold rolling plate Download PDFInfo
- Publication number
- CN100476032C CN100476032C CNB200610045619XA CN200610045619A CN100476032C CN 100476032 C CN100476032 C CN 100476032C CN B200610045619X A CNB200610045619X A CN B200610045619XA CN 200610045619 A CN200610045619 A CN 200610045619A CN 100476032 C CN100476032 C CN 100476032C
- Authority
- CN
- China
- Prior art keywords
- cold
- reduced sheet
- annealing
- steel cold
- chemical passivation
- 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.)
- Expired - Fee Related
Links
- 238000000137 annealing Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000007797 corrosion Effects 0.000 title claims abstract description 20
- 238000005260 corrosion Methods 0.000 title claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 title claims description 28
- 239000010959 steel Substances 0.000 title claims description 28
- 238000006388 chemical passivation reaction Methods 0.000 title claims description 26
- 238000005097 cold rolling Methods 0.000 title 1
- 230000002708 enhancing effect Effects 0.000 title 1
- 238000004519 manufacturing process Methods 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims abstract description 4
- -1 amine benzoate Chemical class 0.000 claims abstract description 4
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims abstract description 4
- WXMKPNITSTVMEF-UHFFFAOYSA-M sodium benzoate Chemical compound [Na+].[O-]C(=O)C1=CC=CC=C1 WXMKPNITSTVMEF-UHFFFAOYSA-M 0.000 claims abstract description 4
- 235000010234 sodium benzoate Nutrition 0.000 claims abstract description 4
- 239000004299 sodium benzoate Substances 0.000 claims abstract description 4
- 239000002904 solvent Substances 0.000 claims abstract description 3
- 238000002425 crystallisation Methods 0.000 claims description 3
- 230000008025 crystallization Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 2
- 238000011156 evaluation Methods 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 5
- 239000010960 cold rolled steel Substances 0.000 abstract description 3
- 230000000415 inactivating effect Effects 0.000 abstract 3
- 238000010791 quenching Methods 0.000 abstract 3
- 230000000171 quenching effect Effects 0.000 abstract 3
- 230000002779 inactivation Effects 0.000 abstract 1
- 239000003112 inhibitor Substances 0.000 abstract 1
- 238000002161 passivation Methods 0.000 description 5
- 238000005554 pickling Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- 238000011282 treatment Methods 0.000 description 4
- 229910019142 PO4 Inorganic materials 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 3
- 239000010452 phosphate Substances 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000005238 degreasing Methods 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000012876 topography Methods 0.000 description 2
- 241000221535 Pucciniales Species 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229960004418 trolamine Drugs 0.000 description 1
Images
Landscapes
- Chemical Treatment Of Metals (AREA)
Abstract
The chemical inactivation process for raising the anticorrosion of continuously annealed IF cold rolled steel plate is completed in a cold rolled plate continuously annealing production line. The present invention features that inactivating solution containing corrosion inhibitor in 1-5 wt% concentration and pH 8-12 is filled into the quenching tank the annealed cold plate passes through. The inactivating solution contains amine benzoate 20-30 wt%, sodium benzoate 20-30 wt%, urotropine 30-40 wt%, monoethanol amine 10-20 wt%, and water as solvent for the rest. The inactivating solution inside the quenching tank is maintained at 50-70 deg.c, and the annealed cold plate passes through the quenching tank in the speed of 200 m/min. The present invention can raise the anticorrosion performance of continuously annealed IF cold rolled steel plate easily and effectively.
Description
Technical field
The present invention relates to the antirust technology of the cold-rolled steel sheet of continuous annealing production, a kind of online chemical passivation method to steel plate.
Background technology
The cold-reduced sheet surface is not because there is the protection of coating or coating; under hot and humid weather condition, be easy to corrosion; especially the IF steel cold-reduced sheet of continuous annealing is because the annealing process of high temperature low speed; easy oxidation element such as a spot of Mn, Si forms granular oxide compound and ferroelectric oxide film formation corrosion microbattery in the substrate on its surface, has quickened the corrosion rate of IF steel cold-reduced sheet.IF steel cold-reduced sheet is in storage, transportation and user's use, and when atmospheric moisture surpasses 65%, its surface is easy to occur the phenomenon of corrosion, has directly influenced the normal use of material and has increased user's processing cost.Therefore, how to suppress, remove or cover Mn, the Si enriched layer on cold-reduced sheet surface, just become the gordian technique of improving annealing IF steel cold-reduced sheet easy-to-rust.
At present, it is antirust to adopt the oiled method to carry out usually before batching after the annealing of annealing IF steel cold-reduced sheet, finished product volume oiling 1000～1500mg/m
2, middle volume oiling 500～800mg/m
2Played certain effect; but have following limitation: the one, antirust timeliness is short: corrosion protection is carried out in oiling can only be in tens hours effectively; and because of the slushing oil skewness on cold-reduced sheet surface; especially through behind long-distance transport, the user Kai Bao, be difficult to play effective rust inhibition.The 2nd, pollution problem: must carry out cleaning by degreasing before use to the oiled cold-reduced sheet and handle, increase use cost, and brought pollution problem.
The bismuthate treatment technology before the cold-reduced sheet annealing has been studied by Kawasaki, Japan iron making technology institute (CAMP-ISIJ 82-S449), suppresses the enrichment of Mn, Si in the IF steel annealing process by formation bismuthate film, thereby improves its solidity to corrosion.But this method has two deficiencies: the one, and bismuthate belongs to muddy type solution, and bottom, preparation back is easy to crystallization, and the actual difficulty of using is bigger.The 2nd, must connect existing cold-reduced sheet and move back facility transformation, promptly before annealing, increase the chemical treatment technology section.
The continuous annealing process of Belgium's Cockerill discovery " HOWAQ " can be eliminated Mn, the Si enriched layer that IF steel cold-reduced sheet forms in the annealing process section, thereby significantly improves its solidity to corrosion.This technology is to take a series of chemical treatments such as water-cooled, pickling, rinsing after annealing.Other has " Nippon Steel " also to increase the processing of flash nickel after the continuous annealing pickling.Japanese Patent JP 56112420A also proposes the technology that neutralizing treatment is carried out in first pickling again.But these methods have following two limitation:
1, the technology more complicated of pickling and aftertreatment thereof, cost is very high.
2, the process section of pickling and aftertreatment thereof is very long, and existing continuous annealing production line does not have enough spaces to transform usually.
Above-mentioned all, all Mn, the Si enriched layer on explanation inhibition or removal cold-reduced sheet surface are expensive technology, and must compare big transformation to existing continuous annealing production line.
Summary of the invention
The purpose of this invention is to provide the corrosion proof chemical passivation method of a kind of raising annealing IF steel cold-reduced sheet, needn't transform continuous annealing production line, pollution-free, improve the solidity to corrosion of cold-reduced sheet at low cost.
The corrosion proof chemical passivation method of a kind of raising annealing IF steel cold-reduced sheet, utilize the cold-reduced sheet production line facility of continuous annealing, in the hardening groove of the IF steel cold-reduced sheet process after it is characterized in that annealing is the passivating solution that contains inhibiter, concentration 1～5%, pH 8～12, inhibiter in the passivating solution by the solute weight percent is: phenylformic acid amine 20--30%, Sodium Benzoate 20--30%, urotropine 30-40%, monoethanolamine 10-20%, solvent are water; 50～70 ℃ of passivating solution temperature in the maintenance hardening groove, the IF steel cold-reduced sheet of normarzing annealing passes through the hardening groove with 200m/min after coming out from annealing furnace.
Chemical passivation method of the present invention does not need that equipment is carried out any transformation just can change the water in the hardening groove into passivating solution on existing continuous annealing production line, make from the cold-reduced sheet surface that annealing furnace comes out to produce chemical reaction and directly realize passivation; Through extracting and the stoving process section on original production line, its surperficial complete drying forms chemical coating later on the cold-reduced sheet behind the post-passivation.
Chemical passivation method of the present invention has following characteristic:
1, chemical passivation is directly finished on existing continuous annealing production line, does not need to transform production line.
2, the preparation of chemical passivation solution is easy, and cost is very low, and is actual easy to use.
3, cold-reduced sheet obviously improves its corrosion resistance nature after chemical passivation.
4, the passive film on cold-reduced sheet surface does not change the original condition of surface of matrix.
5, the passive film on cold-reduced sheet surface does not influence user's back road phosphatization operation.
Estimate feasibility and prospect that invention is applied: nearly 16 of present domestic continuous annealing production line, about 6,400,000 tons of output, then more what build and plan to build, and the easy-to-rust of the cold-reduced sheet that continuous annealing is produced is the realistic problem that steel mill and final user directly face.The present invention can directly improve the solidity to corrosion of the cold-reduced sheet of continuous annealing production, have easy, effective characteristics, and do not need existing production line is made any change, do not influence the use of user's later process, obtain widespread use on the continuous annealing line at home.
Description of drawings
Accompanying drawing 1 is to implement synoptic diagram in the production of present method after 1550 continuous annealing cold-reduced sheets are come out of the stove;
Accompanying drawing 2.1 is microscopic appearance contrasts of the cold-reduced sheet and the cold-reduced sheet phosphatize phosphate coat after Fig. 2 .2 chemical passivation of unpassivated;
Embodiment
1 a kind of implementation step that improves the corrosion proof chemical passivation method of annealing IF steel cold-reduced sheet is described in conjunction with the accompanying drawings:
Step 1: select the inhibiter raw material, press weight percentages:
Phenylformic acid amine 20--30%, Sodium Benzoate 20--30%, urotropine 30-40%, monoethanolamine 10-20%;
Step 2: above-mentioned inhibiter is joined in the hardening groove after continuous annealing production line is come out of the stove,, become the passivating solution of concentration 1～5% after the dissolving, add in the hardening groove after 1550 continuous annealing cold-reduced sheets are come out of the stove with 2% concentration in this example with the water dissolution in the groove.
Step 3: use a small amount of yellow soda ash or trolamine, the pH that regulates passivating solution reaches 8～12, or 9～10 scope.
Step 4: the passivating solution in the hardening groove is heated to 50～70 ℃, and in operation process, the passivating solution temperature in the hardening groove is remained in this scope.Passivating solution in this example is heated to 60 ℃.
Step 5: temperature was about 120 ℃ when the IF steel cold-reduced sheet of normarzing annealing came out from annealing furnace, and with the speed of 200 meters of the per minutes hardening groove through 60 ℃ of passivating solutions, the chemical passivation of cold-reduced sheet was finished in two seconds, made surface of steel plate produce passivation.
Step 6: subsequently the cold-reduced sheet after the chemical passivation through 5.4 meters on original production line extract operation, 7.3 meters drying channel (100 ℃), its surperficial complete drying forms chemical coating later on.
Step 7: last, the cold-reduced sheet after the chemical passivation through smooth, the oiling on original production line, batch, the finished product volume.
The service check of the IF steel cold-reduced sheet after present method is handled:
1, wet-hot aging performance
Wet-hot aging performance after the chemical passivation of IF steel cold-reduced sheet is at 49 ℃, RH＞95% time, hot time＞48 of moisture-proof hour.
The cold-reduced sheet of cold-reduced sheet after the chemical passivation and unpassivated is carried out humid heat test, red rust promptly appearred in 12 hours in the cold-reduced sheet of unpassivated, and the cold-reduced sheet after the chemical passivation can reach 48 hours no red rusts, has obviously improved the wet-hot aging performance of original IF steel cold-reduced sheet.
2 phosphatizations
Use the scanning electron microscopic observation surface topography, compare phosphatize phosphate coat pattern no significant difference with passivation cold-reduced sheet not.
The cold-reduced sheet analog subscriber technology of cold-reduced sheet after the chemical passivation and unpassivated is carried out degreasing, table accent, bonderizing, adopt the scanning electron microscopic observation surface topography then, contrast as can be seen from the SEM photo of Fig. 2 .1 and Fig. 2 .2, the passivation cold-reduced sheet is not compared, phosphatize phosphate coat pattern no significant difference.The proof chemical passivation does not have influence to the phosphatization crystallization of cold-reduced sheet.Even changes in environmental conditions is bigger, the IF steel cold-reduced sheet after the chemical passivation can keep not corrosion of product in the long time in storage, transportation and user's use, and any variation does not take place on the surface, does not influence the outward appearance on surface.In the later use of cold-reduced sheet, its surface film can be removed along with the cleaning on surface, does not influence the follow-up use of product.
In the validity check process, also carried out smooth influence test: the cold-reduced sheet after the chemical passivation is carried out the smooth of 1% draft to passive film, with without smooth chemical passivation cold-reduced sheet contrast carrying out humid heat test, all rustless behind 48 hours humid heat tests of two kinds of cold-reduced sheets.Prove smooth not influence of passive film solidity to corrosion to the cold-reduced sheet surface.
Claims (2)
1, the corrosion proof chemical passivation method of a kind of raising annealing IF steel cold-reduced sheet, utilize the cold-reduced sheet production line facility of continuous annealing, be the passivating solution that contains inhibiter in the hardening groove of the cold-reduced sheet process after it is characterized in that annealing, concentration 1～5%, pH 8～12, inhibiter by the solute weight percent in the passivating solution is: phenylformic acid amine 20--30%, Sodium Benzoate 20--30%, urotropine 30-40%, monoethanolamine 10-20%, and solvent is a water; 50～70 ℃ of passivating solution temperature in the maintenance hardening groove, the IF steel cold-reduced sheet of normarzing annealing passes through the hardening groove with 200m/min after coming out from annealing furnace.
2, the corrosion proof chemical passivation method of a kind of raising annealing IF steel cold-reduced sheet according to claim 1 is characterized in that the performance evaluation index of the annealed IF steel cold-reduced sheet handled with this method can reach:
(1) at 49 ℃, RH＞95% time, hot time＞48 of moisture-proof hour;
(2) phosphatization: the processing of chemical passivation method to IF steel cold-reduced sheet phosphatization crystallization do not have influence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610045619XA CN100476032C (en) | 2006-01-09 | 2006-01-09 | Chemical passivation method for enhancing corrosion resistance of continuous annealing IF steel cold rolling plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610045619XA CN100476032C (en) | 2006-01-09 | 2006-01-09 | Chemical passivation method for enhancing corrosion resistance of continuous annealing IF steel cold rolling plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN100999818A CN100999818A (en) | 2007-07-18 |
| CN100476032C true CN100476032C (en) | 2009-04-08 |
Family
ID=38258642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200610045619XA Expired - Fee Related CN100476032C (en) | 2006-01-09 | 2006-01-09 | Chemical passivation method for enhancing corrosion resistance of continuous annealing IF steel cold rolling plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100476032C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104451646A (en) * | 2014-12-11 | 2015-03-25 | 天长市飞龙金属制品有限公司 | Tin coating passivator |
| CN104975284A (en) * | 2015-06-30 | 2015-10-14 | 安徽飞达新材料科技股份有限公司 | Surface treatment process for cold-rolled stainless steel strip |
| CN104975282A (en) * | 2015-06-30 | 2015-10-14 | 安徽飞达新材料科技股份有限公司 | Passivating agent for cold-rolled steel sheet |
| CN107475702A (en) * | 2017-08-11 | 2017-12-15 | 马钢(集团)控股有限公司 | A kind of electrical sheet surface passivation treatment method |
-
2006
- 2006-01-09 CN CNB200610045619XA patent/CN100476032C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN100999818A (en) | 2007-07-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102245789B (en) | High-purity ferritic stainless steel having excellent corrosion resistance, and method for producing same | |
| CN101643828B (en) | Production method of anti-aging tinning black plate | |
| CN100476032C (en) | Chemical passivation method for enhancing corrosion resistance of continuous annealing IF steel cold rolling plate | |
| CN105297033A (en) | Production method of hot-rolling, pickling-free, direct-cold-rolling and reduction annealing hot-dip product | |
| CN104032109B (en) | A kind of high-strength steel passes through hot rolling and the preparation method of burning optimization on line | |
| CN103243339A (en) | Continuous annealing and acid washing method for medium-chromium ultrapure ferrite stainless steel | |
| CN101613827A (en) | A kind of high-performance cold rolled phase transformation plasticity steel and preparation method thereof | |
| CN100999826B (en) | Electrolyting passivating process for enhancing corrosion resisting proferty of continuous annealing IF steel cold rolling plate | |
| CN105200441A (en) | Hot-dip coated product with oxide layer and its manufacturing method and use | |
| CN115323142A (en) | Production method of marine atmospheric corrosion resistant steel plate | |
| CN107208213A (en) | The exhaust system components ferrite-group stainless steel of corrosion resistance excellent after heating | |
| CN102277584B (en) | Manufacturing method of biotransformation film metal plate | |
| CN100469935C (en) | CSP production process for hot-galvanizing-baking hardened steel sheet | |
| CN104250733A (en) | Cold-rolled plate surface passivation liquid | |
| CN101603148B (en) | Method for producing economic low-temperature heating oriented electrical steel | |
| CN105256235A (en) | High-pressure gas cylinder steel and method for removing scale on surface of high-pressure gas cylinder steel | |
| CN104250754A (en) | Cold-rolled plate surface passivation technology | |
| CN103341489B (en) | Method for overcoming defect of forming pits in hot rolling process of high-strength IF steel containing P | |
| CN103469063A (en) | Method for producing hot galvanized roasted hardened steel plate | |
| CN105518172A (en) | Steel for resistance to complex corrosion from hydrochloric acid and sulfuric acid, having excellent wear resistance and surface qualities, and method of manufacturing same | |
| CN102886651B (en) | Manufacturing process of round pipe steel of chain | |
| CN106311797A (en) | Preparation process of gear steel seamless pipe | |
| CN115094216B (en) | Method for eliminating color difference defect of TRIP high-strength steel | |
| KR101066579B1 (en) | Surface treatment method for ferritic stainless hot-rolled steel plate | |
| CN101348855A (en) | Production method of common orientated electrical steel having higher magnetic strength |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090408 Termination date: 20110109 |