CN101165223A - Acid pickling method for stainless steel surface - Google Patents
Acid pickling method for stainless steel surface Download PDFInfo
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- CN101165223A CN101165223A CNA2007101392306A CN200710139230A CN101165223A CN 101165223 A CN101165223 A CN 101165223A CN A2007101392306 A CNA2007101392306 A CN A2007101392306A CN 200710139230 A CN200710139230 A CN 200710139230A CN 101165223 A CN101165223 A CN 101165223A
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Abstract
The stainless steel coil pickling process includes the following steps: welding circulating Ni steel tabs to ends of annealed stainless steel coil; passing the stainless steel coil successively through the Nos. 1-3 electrolysis bathes with electrolyte of Na2SO4 solution of specific weight 1.15-1.20 g/cu cm and at 85+/-5 deg.c; passing the stainless steel coil through the No. 4 electrolysis bathe with electrolyte of HNO3 solution of 85+/-10 g/l concentration and at 40-50 deg.c; passing the stainless steel coil successively through two washing tanks holding water at 40-50 deg.c; and finally cutting off the circulating Ni steel tabs. The process can raise the surface glossiness of stainless steel coil, and has low pickling cost and short pickling period.
Description
Technical field
The present invention relates to a kind of acid washing method of stainless steel surface, specifically is the acid washing method of removing the thin oxide skin that the stainless steel cold-rolled plate surface forms when finished products.
Background technology
Because the stainless steel cold-rolled plate surface forms thin oxide skin when finished products, so the pickling on cold-rolling stainless steel surface is the important procedure that scale removal forms corrosion resistance.Existing 2B stainless steel surface acid washing method, shade in the surface owing to produce the passivation layer of Cr2O3 on stainless steel cold-rolled plate surface after the pickling, stainless steel surface does not almost have metalluster after the pickling, if be used in decoration industry, must be in the polishing processing in step of back through just polishing out the mirror board of high glossiness behind corase grind, the correct grinding, and because of the covering of surface passivation layer, the tiny defect that causes is in process of production all covered by it, find in the time of can not checking on final surface, influence the surface quality of high step, can not be used as high-grade decorative use.
Summary of the invention
In order to overcome the above-mentioned deficiency of the acid washing method that has stainless steel surface now, the invention provides a kind of acid washing method that improves the stainless steel surface of stainless steel surface glossiness.
The acid washing method of this stainless steel surface comprises following sequential steps:
(1) coil of strip front end after annealing and tail end welding Ni steel cycle stock, the long 400-600m of Ni steel cycle stock of every end welding is can the stable regulation processing condition being as the criterion;
(2) stainless steel after will annealing is by first electrolyzer, and the medium of first electrolyzer is Na
2SO
4Solution, proportion 1.15-1.20g/cm
3, 85 ± 5 ℃ of electrolyte temperatures adopt the electrolysis mode pickling, electrolytic speed 60m/min-65m/min;
(3) then stainless steel is passed through second electrolyzer, the medium of second electrolyzer is Na
2SO
4Solution, proportion 1.15-1.20g/cm
3, 85 ± 5 ℃ of electrolyte temperatures adopt the electrolysis mode pickling, electrolytic speed 60m/min-65m/min;
(4) then stainless steel is passed through the 3rd electrolyzer, the medium of the 3rd electrolyzer is Na
2SO
4Solution, proportion 1.15-1.20g/cm
3, 85 ± 5 ℃ of electrolyte temperatures adopt the electrolysis mode pickling, electrolytic speed 60m/min-65m/min;
(5) then stainless steel is passed through the 4th electrolyzer, the medium of the 4th groove is HNO
3Solution, acid concentration are 85 ± 10g/l, acid liquor temperature 40-50 ℃, adopt the electrolysis mode pickling, pickling speed 60m/min-65m/min;
(6) then stainless steel is passed through first pickling tank, the medium of first pickling tank is a water, and temperature is 40-50 ℃, crosses steel speed 60m/min-65m/min;
(7) then stainless steel is passed through second pickling tank, the medium of second pickling tank is a water, and temperature is 40-50 ℃, crosses steel speed 60m/min-65m/min;
(8) cut away the Ni steel cycle stock that coil of strip front end and tail end weld.
2, other technologies are adjusted (this adjusting is in order to improve effect)
(1) ball blast adopts the slow speed of revolution (the ramming head rotating speed drops to 1850～1950 rev/mins by original 2100 rev/mins) during the hot rolling raw material production before the pickling, is as the criterion to beat clean surface scale.
(2) use high speed steel rider (surfaceness≤0.010 μ m) after the polishing during cold rolling, and passage qualification roll speed is 150m/min and 200m/min before final pass and finished product, for guaranteeing surface quality, require to check surface of steel plate (surface requirements does not have any defective) at every time.
(3) the smooth roller (surfaceness≤0.010 μ m) after the smooth employing polishing after the finished products pickling, and continuous formation is not less than three times, and general three to five times, to guarantee the surface of steel plate glossiness.
The acid washing method of this stainless steel surface, reached attenuate stainless steel surface acid wash passivation layer, under less pickling medium kind and low acid concentration state, effectively remove the oxide skin that in annealing process, produces, improve the stainless steel surface glossiness, its alternative BA plate is used, save the pickling cost, reduce the time of pickling process polishing processing.
Embodiment
Describe the embodiment of the acid washing method of this stainless steel surface in detail below in conjunction with embodiment, but the embodiment of the acid washing method of this stainless steel surface is not limited to following embodiment.
Embodiment one
The present embodiment pickling be annealing after 300 series stainless steels, its step is as follows:
(1) the Ni steel cycle stock of the long 400m of each welding of coil of strip front end after annealing and tail end;
(2) stainless steel after will annealing is by first electrolyzer, and the medium of first electrolyzer is Na
2SO
4Solution, proportion 1.17g/cm
3, 85 ℃ of electrolyte temperatures adopt the electrolysis mode pickling, electrolytic speed 65m/min;
(3) then stainless steel is passed through second electrolyzer, the medium of second electrolyzer is Na
2SO
4Solution, proportion 1.16g/cm
3, 80 ℃ of electrolyte temperatures adopt the electrolysis mode pickling, electrolytic speed 65m/min;
(4) then stainless steel is passed through the 3rd electrolyzer, the medium of the 3rd electrolyzer is Na
2SO
4Solution, proportion 1.20g/cm
3, 87 ℃ of electrolyte temperatures adopt the electrolysis mode pickling, electrolytic speed 65m/min;
(5) then stainless steel is passed through the 4th electrolyzer, the medium of the 4th groove is HNO
3Solution, acid concentration are 85g/l, and 45 ℃ of acid liquor temperatures adopt the electrolysis mode pickling, pickling speed 65m/min;
(6) then stainless steel is passed through first pickling tank, the medium of first pickling tank is a water, and temperature is 45 ℃, crosses steel speed 65m/min;
(7) then stainless steel is passed through second pickling tank, the medium of second pickling tank is a water, and temperature is 46 ℃, crosses steel speed 65m/min;
(8) cut away the Ni steel cycle stock that coil of strip front end and tail end weld.
The stainless steel surface glossiness is bright than the 2B plate after the present embodiment pickling, and its alternative BA plate polishing is used.
Embodiment two
The present embodiment pickling be annealing after 400 series stainless steels, its step is as follows:
(1) the Ni steel cycle stock of the long 600m of each welding of coil of strip front end after annealing and tail end;
(2) stainless steel after will annealing is by first electrolyzer, and the medium of first electrolyzer is Na
2SO
4Solution, proportion 1.17g/cm
3, 85 ℃ of electrolyte temperatures adopt the electrolysis mode pickling, electrolytic speed 60m/min;
(3) then stainless steel is passed through second electrolyzer, the medium of second electrolyzer is Na
2SO
4Solution, proportion 1.16g/cm
3, 80 ℃ of electrolyte temperatures adopt the electrolysis mode pickling, electrolytic speed 60m/min;
(4) then stainless steel is passed through the 3rd electrolyzer, the medium of the 3rd electrolyzer is Na
2SO
4Solution, proportion 1.20g/cm
3, 87 ℃ of electrolyte temperatures adopt the electrolysis mode pickling, electrolytic speed 60m/min;
(5) then stainless steel is passed through the 4th electrolyzer, the medium of the 4th groove is HNO
3Solution, acid concentration are 85g/l, and 45 ℃ of acid liquor temperatures adopt the electrolysis mode pickling, pickling speed 60m/min;
(6) then stainless steel is passed through first pickling tank, the medium of first pickling tank is a water, and temperature is 45 ℃, crosses steel speed 60m/min;
(7) then stainless steel is passed through second pickling tank, the medium of second pickling tank is a water, and temperature is 46 ℃, crosses steel speed 60m/min
(8) cut away the Ni steel cycle stock that coil of strip front end and tail end weld.
The stainless steel surface glossiness uses its alternative BA plate polishing than 400 serial 2B plate brightness height after the present embodiment pickling.
Above-mentioned two embodiment will scrub clean steel band after steel band is through each electrolyzer or pickling tank with clear water.In order to improve effect, before and after finished product acid-washing, the flattening process after raw material ball blast technology, cold-rolling process and the pickling before the pickling has been done following adjustment:
(1) ball blast adopts the slow speed of revolution (the ramming head rotating speed drops to 1850～1950 rev/mins) during the hot rolling raw material production before the pickling, is as the criterion to beat clean surface scale;
(2) use high speed steel rider (surfaceness≤0.010 μ m) after the polishing during cold rolling, and passage qualification roll speed is 150m/min and 200m/min before final pass and finished product, for guaranteeing surface quality, require to check surface of steel plate that surface requirements does not have any defective at every time;
(3) the smooth roller (surfaceness≤0.010 μ m) after the smooth employing polishing after the finished products pickling, and continuous formation, embodiment one continuous formation three times, embodiment two connects smooth five times, to guarantee the surface of steel plate glossiness.
The steel speed of crossing in the present specification, pickling speed, electrolytic speed are the vertically move speed of steel band when pickling, electrolysis.
Claims (2)
1. the acid washing method of a stainless steel surface, it comprises following sequential steps:
(1) coil of strip front end after annealing and tail end welding Ni steel cycle stock, the long 400-600m of Ni steel cycle stock of every end welding is as the criterion with the stable regulation processing condition;
(2) stainless steel after will annealing is by first electrolyzer, and the medium of first electrolyzer is Na
2SO
4Solution, proportion 1.15-1.20g/cm
3, 85 ± 5 ℃ of electrolyte temperatures adopt the electrolysis mode pickling, electrolytic speed 60m/min-65m/min;
(3) then stainless steel is passed through second electrolyzer, the medium of second electrolyzer is Na
2SO
4Solution, proportion 1.15-1.20g/cm
3, 85 ± 5 ℃ of electrolyte temperatures adopt the electrolysis mode pickling, electrolytic speed 60m/min-65m/min;
(4) then stainless steel is passed through the 3rd electrolyzer, the medium of the 3rd electrolyzer is Na
2SO
4Solution, proportion 1.15-1.20g/cm
3, 85 ± 5 ℃ of electrolyte temperatures adopt the electrolysis mode pickling, electrolytic speed 60m/min-65m/min;
(5) then stainless steel is passed through the 4th electrolyzer, the medium of the 4th groove is HNO
3Solution, acid concentration are 85 ± 10g/l, acid liquor temperature 40-50 ℃, adopt the electrolysis mode pickling, pickling speed 60m/min-65m/min;
(6) then stainless steel is passed through first pickling tank, the medium of first pickling tank is a water, and temperature is 40-50 ℃, crosses steel speed 60m/min-65m/min;
(7) then stainless steel is passed through second pickling tank, the medium of second pickling tank is a water, and temperature is 40-50 ℃, crosses steel speed 60m/min-65m/min;
(8) cut away the Ni steel cycle stock that coil of strip front end and tail end weld.
2. the acid washing method of stainless steel surface according to claim 1 is characterized in that the flattening process after raw material ball blast technology, cold-rolling process and the pickling before the pickling has been done following adjustment:
(1) ball blast adopts the slow speed of revolution during hot rolling raw material production before the pickling, and the ramming head rotating speed is 1850～1950 rev/mins, is as the criterion to beat clean surface scale;
(2) use high speed steel rider after the polishing during cold rolling, the surfaceness of high speed steel rider≤0.010 μ m, and passage qualification roll speed is 150m/min and 200m/min before final pass and finished product, for guaranteeing surface quality, requirement is checked surface of steel plate at every time, and surface requirements does not have any defective;
(3) the smooth roller after the smooth employing polishing after the finished products pickling, the surfaceness of smooth roller≤0.010 μ m, and continuous formation is not less than three times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101392306A CN101165223B (en) | 2007-08-15 | 2007-08-15 | Acid pickling method for stainless steel surface |
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|---|---|---|---|
| CN2007101392306A CN101165223B (en) | 2007-08-15 | 2007-08-15 | Acid pickling method for stainless steel surface |
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| CN101165223A true CN101165223A (en) | 2008-04-23 |
| CN101165223B CN101165223B (en) | 2010-06-09 |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102220625A (en) * | 2011-06-01 | 2011-10-19 | 孔庆山 | Electrolytic spray cleaning process for large metal workpiece |
| CN102489505A (en) * | 2011-12-13 | 2012-06-13 | 山西太钢不锈钢股份有限公司 | Cold-rolled steel strip and production method thereof, and anode plate material for electric dust removing device |
| CN102864289A (en) * | 2012-10-19 | 2013-01-09 | 云南天高镍业有限公司 | Method for performing annealing and acid-washing on SUS430 stainless steel |
| CN103820842A (en) * | 2014-02-21 | 2014-05-28 | 南京航空航天大学 | Pickling method for surface of austenitic stainless steel before cold bending |
| CN103831627A (en) * | 2014-03-05 | 2014-06-04 | 山西太钢不锈钢股份有限公司 | Method for lowering surface roughness of cold-rolled nickel stainless steel bright plate |
| CN103906864A (en) * | 2011-09-26 | 2014-07-02 | Ak钢铁产权公司 | Stainless steel pickling in oxidizing, electrolytic acid bath |
| CN105154900A (en) * | 2015-09-25 | 2015-12-16 | 甘肃酒钢集团宏兴钢铁股份有限公司 | High-chromium austenitic stainless steel surface acid pickling method |
| CN105586600A (en) * | 2016-03-16 | 2016-05-18 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Duplex stainless steel cold rolling annealing and pickling process |
| CN107413774A (en) * | 2017-01-20 | 2017-12-01 | 福建宏旺实业有限公司 | The broken phosphorus machine in four stations |
| CN107413771A (en) * | 2017-01-20 | 2017-12-01 | 福建宏旺实业有限公司 | A kind of casting skin coil of strip derusting process |
| CN109267142A (en) * | 2018-09-26 | 2019-01-25 | 中国民航大学 | A kind of PH stainless steel room temperature electrolytic pickling method |
| CN111057935A (en) * | 2019-12-25 | 2020-04-24 | 浦项(张家港)不锈钢股份有限公司 | Preparation method of heat-resistant stainless steel |
| CN113894163A (en) * | 2021-10-20 | 2022-01-07 | 江苏甬金金属科技有限公司 | Cold rolling process of wide ultrathin stainless steel band |
| CN114086188A (en) * | 2021-10-18 | 2022-02-25 | 山西太钢不锈钢股份有限公司 | Method for improving pickling effect of stainless steel of wide and thick cold plate |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5490908A (en) * | 1994-07-11 | 1996-02-13 | Allegheny Ludlum Corporation | Annealing and descaling method for stainless steel |
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2007
- 2007-08-15 CN CN2007101392306A patent/CN101165223B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102220625B (en) * | 2011-06-01 | 2012-10-17 | 孔庆山 | Electrolytic spray cleaning process for large metal workpiece |
| CN102220625A (en) * | 2011-06-01 | 2011-10-19 | 孔庆山 | Electrolytic spray cleaning process for large metal workpiece |
| US9580831B2 (en) | 2011-09-26 | 2017-02-28 | Ak Steel Properties, Inc. | Stainless steel pickling in an oxidizing, electrolytic acid bath |
| CN103906864A (en) * | 2011-09-26 | 2014-07-02 | Ak钢铁产权公司 | Stainless steel pickling in oxidizing, electrolytic acid bath |
| CN103906864B (en) * | 2011-09-26 | 2017-01-18 | Ak钢铁产权公司 | Stainless steel pickling in oxidizing, electrolytic acid bath |
| CN102489505A (en) * | 2011-12-13 | 2012-06-13 | 山西太钢不锈钢股份有限公司 | Cold-rolled steel strip and production method thereof, and anode plate material for electric dust removing device |
| CN102489505B (en) * | 2011-12-13 | 2014-11-26 | 山西太钢不锈钢股份有限公司 | Cold-rolled steel strip and production method thereof, and anode plate material for electric dust removing device |
| CN102864289A (en) * | 2012-10-19 | 2013-01-09 | 云南天高镍业有限公司 | Method for performing annealing and acid-washing on SUS430 stainless steel |
| CN103820842A (en) * | 2014-02-21 | 2014-05-28 | 南京航空航天大学 | Pickling method for surface of austenitic stainless steel before cold bending |
| CN103831627A (en) * | 2014-03-05 | 2014-06-04 | 山西太钢不锈钢股份有限公司 | Method for lowering surface roughness of cold-rolled nickel stainless steel bright plate |
| CN103831627B (en) * | 2014-03-05 | 2016-03-30 | 山西太钢不锈钢股份有限公司 | A kind of method reducing Cold-Rolled Nickel system stainless steel bright plate surface roughness |
| CN105154900A (en) * | 2015-09-25 | 2015-12-16 | 甘肃酒钢集团宏兴钢铁股份有限公司 | High-chromium austenitic stainless steel surface acid pickling method |
| CN105586600A (en) * | 2016-03-16 | 2016-05-18 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Duplex stainless steel cold rolling annealing and pickling process |
| CN105586600B (en) * | 2016-03-16 | 2018-06-29 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of cold rolled annealed acid cleaning process of two phase stainless steel |
| CN107413774A (en) * | 2017-01-20 | 2017-12-01 | 福建宏旺实业有限公司 | The broken phosphorus machine in four stations |
| CN107413771A (en) * | 2017-01-20 | 2017-12-01 | 福建宏旺实业有限公司 | A kind of casting skin coil of strip derusting process |
| CN109267142A (en) * | 2018-09-26 | 2019-01-25 | 中国民航大学 | A kind of PH stainless steel room temperature electrolytic pickling method |
| CN111057935A (en) * | 2019-12-25 | 2020-04-24 | 浦项(张家港)不锈钢股份有限公司 | Preparation method of heat-resistant stainless steel |
| CN111057935B (en) * | 2019-12-25 | 2021-04-02 | 浦项(张家港)不锈钢股份有限公司 | Preparation method of heat-resistant stainless steel |
| CN114086188A (en) * | 2021-10-18 | 2022-02-25 | 山西太钢不锈钢股份有限公司 | Method for improving pickling effect of stainless steel of wide and thick cold plate |
| CN113894163A (en) * | 2021-10-20 | 2022-01-07 | 江苏甬金金属科技有限公司 | Cold rolling process of wide ultrathin stainless steel band |
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