Title:
STEEL SHEET PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2015/198471
Kind Code:
A1
Abstract:
A steel sheet production method according to the present invention includes a washing step (1) wherein a steel sheet that has been cold rolled is washed, a rinsing step (2) wherein the steel sheet that has undergone the washing step (1) is rinsed, and a drying step (3) wherein the steel sheet that has undergone the rinsing step (2) is dried. The rinsing step (2) includes one or more rinsing treatments, the final rinsing treatment using a rinsing agent (α) that contains a component (a) that is represented by general formula (1) and a component (b) that is represented by general formula (2) (formula (2): R5-O-(AO)mH), the total concentration of component (a) and component (b) being 150 mg/kg or less of the rinsing agent (α). The rinsing agent (α) has an inorganic salt cation concentration of 0.12-100 mmol/kg or less and has a sulfate ion concentration of 1.5 mmol/kg or less. The steel sheet production method has a low waste water treatment load and can reduce energy costs for drying a steel sheet or the like post-washing.
Inventors:
KUBOTA KAZUO (JP)
Application Number:
PCT/JP2014/067158
Publication Date:
December 30, 2015
Filing Date:
June 27, 2014
Export Citation:
Assignee:
KAO CORP (JP)
International Classes:
C23G1/14; C25F1/00
Foreign References:
| JP2009155708A | 2009-07-16 | |||
| JP2006265726A | 2006-10-05 | |||
| JPH09255940A | 1997-09-30 | |||
| JPH09118995A | 1997-05-06 |
Attorney, Agent or Firm:
UNIUS PATENT ATTORNEYS OFFICE (JP)
Patent business corporation ユニアス international patent firm (JP)
Patent business corporation ユニアス international patent firm (JP)
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