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Title:
SURFACE TREATMENT SOLUTION COMPOSITION FOR TERNARY HOT-DIP ZINC ALLOY-PLATED STEEL SHEET, PROVIDING EXCELLENT CORROSION RESISTANCE AND BLACKENING RESISTANCE, TERNARY HOT-DIP ZINC ALLOY-PLATED STEEL SHEET SURFACE-TREATED USING SAME, AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2019/124990
Kind Code:
A1
Abstract:
The present invention relates to a chromium-free surface treatment solution composition to be applied to the surface of a metal material, and a metal material surface-treated with the composition. More specifically, the present invention relates to a chromium-free surface treatment solution composition for improving the corrosion resistance, blackening resistance and alkali resistance of a ternary hot-dip zinc alloy-plated steel sheet, and provides: a surface treatment composition comprising, on the basis of 100 wt% of the solid part of the composition, 35-45 wt% of a water-soluble polyurethane resin, 25-40 wt% of a water-soluble acrylic emulsion resin, 5-15 wt% of a curing agent, 3-10 wt% of a silane compound, 0.5-1.5 wt% of a titanium-based compound, 0.3-2.0 wt% of a zirconium-based compound, 1-3 wt% of phosphoric acid compound, 1-2 wt% of a coating adhesion enhancer and 0.1-1 wt% of a lubricant wax; a ternary hot-dip galvanized steel sheet surface-treated therewith; and a method for manufacturing a ternary hot-dip galvanized steel sheet by carrying out surface treatment using the composition.

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Inventors:
CHO SOO-HYOUN (KR)
SON WON-HO (KR)
Application Number:
PCT/KR2018/016284
Publication Date:
June 27, 2019
Filing Date:
December 20, 2018
Export Citation:
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Assignee:
POSCO (KR)
International Classes:
C23C22/07; C09D7/40; C09D133/00; C09D175/06; C23C2/06; C23C2/26; C23C2/40; C23C28/00
Foreign References:
KR20090072234A2009-07-02
KR20160070310A2016-06-20
KR20120097728A2012-09-05
KR20140081574A2014-07-01
KR20060076953A2006-07-05
JPS5328857A1978-03-17
JPS5171233A1976-06-19
JP2002332574A2002-11-22
JPH0796699A1995-04-11
JP2005146340A2005-06-09
Other References:
See also references of EP 3730672A4
Attorney, Agent or Firm:
C&S PATENT AND LAW OFFICE (KR)
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