Title:
酸洗後の鋼板表面の黄変防止方法
Document Type and Number:
Japanese Patent JP5482968
Kind Code:
B2
Abstract:
In a method for prevention of yellowing on a surface of a steel sheet subjected to re-pickling, washing with water and drying after a surface of a continuously annealed steel sheet is pickled to remove Si-containing oxide layer from a surface layer of the steel sheet, the surface of the steel sheet is held at a wet state between the pickling and the re-pickling and between the re-pickling and the washing, and more preferably the washing is carried out with water having an iron ion concentration decreased to not more than 20 g/L, whereby the yellowing on the surface of the steel sheet after the pickling is prevented. Thus, cold rolled steel sheets being excellent in not only the appearance quality but also the phosphatability and corrosion resistance after painting are manufactured stably.
Inventors:
Hiroyuki Masuoka
Satoshi Ando
Aizawa Shigeyuki
Kazuki Nakazato
Shoichiro Hira
Satoshi Ando
Aizawa Shigeyuki
Kazuki Nakazato
Shoichiro Hira
Application Number:
JP2013523799A
Publication Date:
May 07, 2014
Filing Date:
January 16, 2013
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
C23G1/08; C22C38/00; C22C38/02; C22C38/06
Domestic Patent References:
| JP2006322028A | 2006-11-30 | |||
| JP2005314725A | 2005-11-10 | |||
| JPH07258873A | 1995-10-09 | |||
| JP2012006128A | 2012-01-12 | |||
| JP2009221586A | 2009-10-01 | |||
| JP2004256896A | 2004-09-16 | |||
| JP2011021240A | 2011-02-03 | |||
| JPS5096618U | 1975-08-12 | |||
| JP2006322028A | 2006-11-30 | |||
| JP2005314725A | 2005-11-10 | |||
| JPH07258873A | 1995-10-09 | |||
| JP2002294476A | 2002-10-09 |
Foreign References:
| WO2009145353A1 | 2009-12-03 | |||
| WO2009145353A1 | 2009-12-03 |
Attorney, Agent or Firm:
Ginza Marronnier Patent Office
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