COMPOSITION FOR SURFACE TREATMENT OF STEEL SHEET AND STEEL SHEET USING SAME

Title:

COMPOSITION FOR SURFACE TREATMENT OF STEEL SHEET AND STEEL SHEET USING SAME

Document Type and Number:

WIPO Patent Application WO/2022/131866

Kind Code:

A1

Abstract:

Disclosed are: a composition for surface treatment capable of imparting, to a steel sheet, plate corrosion resistance, corrosion resistance of processed parts, pit corrosion resistance, blackening resistance, pipe forming oil infiltration, and alkali resistance, and improving foreign-matter defects; and a steel sheet using same. The composition for surface treatment of a steel sheet according to the present invention comprises: a trivalent chromium compound; an adhesiveness improving agent containing a silane compound; an acidity modifier including acids; a crosslinking agent containing a silicate compound; a vanadium-based pit corrosion improving agent; a polymer resin; and a solvent.

Inventors:

CHOI CHANGHOON (KR)
KIM JONGKOOK (KR)
SONG HOCHEOL (KR)

Application Number:

PCT/KR2021/019315

Publication Date:

June 23, 2022

Filing Date:

December 17, 2021

Export Citation:

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Assignee:

POSCO (KR)
UNICOH SPECIALTY CHEMICALS CO LTD (KR)

International Classes:

C23C22/06; C23C2/06; C23C2/26; C23C2/40; C23C28/00; C23F11/18

Foreign References:

KR20180135514A	2018-12-21
KR102065213B1	2020-01-10
US20060054248A1	2006-03-16
JP2008291160A	2008-12-04
US20190242018A1	2019-08-08
KR101786392B1	2017-10-17
KR20060123628A	2006-12-01
KR20050052215A	2005-06-02
KR20090024450A	2009-03-09
KR20040046347A	2004-06-05
JP2002069660A	2002-03-08

Other References: