TREATED SURFACE STEEL - NIPPON PAINT IND COATINGS CO LTD

Title:

TREATED SURFACE STEEL

Document Type and Number:

WIPO Patent Application WO/2017/187799

Kind Code:

A1

Abstract:

[Problem] To provide a treated surface steel with edge corrosion resistance at least equal to chromate treatment without using hexavalent chromium. [Solution] The present invention is a treated surface steel in which a coating film is formed on the surface of steel via a plated layer and the plated layer is obtained by immersing the steel in an Mg-containing galvalume bath. The treated surface steel is characterized in that: the coating film is formed using a coating composition containing a coating film-forming resin, a cross-linking agent, a specified vanadium compound and trimagnesium phosphate; the vanadium compound is a compound having a specific electric conductivity and the content of the vanadium compound is limited to a specified amount with respect to 100 mass% of the total of the coating film-forming resin solids and the cross-linking agent solids; the vanadium compound has a specified pH; and the content of the trimagnesium phosphate is a specified amount with respect to 100 mass% of the total of the coating film-forming resin solids and the cross-linking agent solids.

More Like This:

JP2004176113	RUST-PREVENTIVE STEEL SHEET FOR HIGH CORROSION RESISTANT FUEL TANK
JP2019508590	Anticorrosion coating and how to get it
WO/2009/097847	WHEEL NUTS AND WHEEL BOLTS

Inventors:

SAKAMOTO TOSHIAKI (JP)
TOZAKI YOICHI (JP)
NOMURA HIROMASA (JP)
HAMAMURA TOMONARI (JP)
NASU HIDEAKI (JP)

Application Number:

PCT/JP2017/009035

Publication Date:

November 02, 2017

Filing Date:

March 07, 2017

Export Citation:

Click for automatic bibliography generation Help

Assignee:

NIPPON PAINT IND COATINGS CO LTD (JP)
NIPPON STEEL & SUMIKIN COATED SHEET CORP (JP)

International Classes:

C23C28/00; C23C2/12; C23C22/42

Foreign References:

JPS5857156B2	1983-12-19
JP5118782B2	2013-01-16

Other References: