SURFACE-TREATING SOLUTION COMPOSITION CONTAINING TRIVALENT CHROMIUM AND INORGANIC COMPOUND, ZINC-BASED PLATED STEEL SHEET SURFACE-TREATED USING SAME, AND METHOD FOR PRODUCING SAME

Title:

SURFACE-TREATING SOLUTION COMPOSITION CONTAINING TRIVALENT CHROMIUM AND INORGANIC COMPOUND, ZINC-BASED PLATED STEEL SHEET SURFACE-TREATED USING SAME, AND METHOD FOR PRODUCING SAME

Document Type and Number:

WIPO Patent Application WO/2018/070720

Kind Code:

A1

Abstract:

The present invention provides a surface-treating solution composition, a zinc-based plated steel sheet surface-treated using same, and a method for producing same, wherein the surface-treating solution composition comprises: 10-20 wt% of a trivalent chromium compound including chromium phosphate (A) and chromium nitrate (B), the content ratio thereof, A/(A+B), satisfying 0.3-0.6; 20-40 wt% of a silane-based sol-gel resin in which three kinds of silane compounds are cross-linked; 0.2-0.4 wt% of an anti-rust corrosion resistant compound; 0.1-0.3 wt% of a molybdenum-based compound; 5-10 wt% of a water-soluble cationic urethane resin; 0.5-2.0 wt% of a silane coupling agent; 0.5-2.0 wt% of an Al compound; and 25.3-63.7 wt% of water. The zinc-based plated steel sheet treated with a surface-treating coating material containing trivalent chromium has excellent effects in terms of corrosion resistance, blackening resistance, fingerprint resistance, pipe-forming oil infiltration, and alkali resistance.

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Inventors:

CHO SOO-HYOUN (KR)
SON WON-HO (KR)
CHOI CHANG-HOON (KR)

Application Number:

PCT/KR2017/010918

Publication Date:

April 19, 2018

Filing Date:

September 29, 2017

Export Citation:

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Assignee:

POSCO (KR)

International Classes:

C23C22/05; C09D4/00; C09D5/08; C23C2/06; C23C2/26; C23C2/40; C23C22/40; C23C22/53

Foreign References:

KR20000035781A	2000-06-26
JP2002069660A	2002-03-08
JP2000017451A	2000-01-18
KR20130124380A	2013-11-13
JP2009149926A	2009-07-09
KR20060123628A	2006-12-01
KR20050052215A	2005-06-02
KR20090024450A	2009-03-09
KR20040046347A	2004-06-05
JP2002069660A	2002-03-08

Other References: