SURFACE TREATMENT LIQUID FOR PLATED STEEL SHEET TO BE HOT-PRESSED

Title:

SURFACE TREATMENT LIQUID FOR PLATED STEEL SHEET TO BE HOT-PRESSED

Document Type and Number:

WIPO Patent Application WO/2016/195101

Kind Code:

A1

Abstract:

The present invention is a surface treatment liquid with excellent storage stability and is able to provide a surface-treated steel sheet for which the treatment coating formed has excellent water resistance, solvent resistance, adhesion to plated steel sheets, and hot lubricity as well as chemical conversion treatability after hot-pressing, corrosion resistance after coating, and spot weldability. The surface treatment liquid for a plated steel sheet that is to be hot-pressed comprises an aqueous ZnO dispersion (A) and a water-dispersible organic resin (B). The aqueous ZnO dispersion (A) comprises water and ZnO particles, the particle diameter of which is 50-300 nm. The water-dispersible organic resin (B) has an acid value of 5-45 mg KOH/g and 5-300 nm emulsion particle diameter. The mass ratio (WA/WB) of the mass (WA) of ZnO particles in the aqueous ZnO dispersion to the mass (WB) of solids of the water-dispersible organic resin is 30/70 to 95/5.

Inventors:

FUJITA SOSHI (JP)
MAKI JUN (JP)
YAMANAKA SHINTARO (JP)
KUROSAKI MASAO (JP)
SUZUKI TATSUYA (JP)
MIZUNO KENSUKE (JP)
KOZAKI TAKUMI (JP)
KODAMA TAKAHIRO (JP)

Application Number:

PCT/JP2016/066686

Publication Date:

December 08, 2016

Filing Date:

June 03, 2016

Export Citation:

Click for automatic bibliography generation Help

Assignee:

NIPPON STEEL & SUMITOMO METAL CORP (JP)
NIHON PARKERIZING (JP)

International Classes:

C23C28/00; B21D22/20; C23C2/12

Domestic Patent References:

WO2013157522A1	2013-10-24
WO2009131233A1	2009-10-29
WO2012147886A1	2012-11-01

Foreign References:

JP2013244696A	2013-12-09
JP2013194258A	2013-09-30

Other References: