IDiyas

For the Inventor, By the Inventor

The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11634818 B1

PDFFull Text
Date of Patent:
Apr. 25, 2023

Filed:

Nov. 13, 2018

Solution composition containing trivalent chromium for surface treatment of steel sheet, galvanized steel sheet surface—treated with same, and method for manufacturing galvanized

Applicant:

Posco, Pohang-si, KR;

Inventors:

Soo-Hyoun Cho, Pohang-si, KR;

Won-Ho Son, Pohang-si, KR;

Assignee:

POSCO CO., LTD, Pohang-si, KR;

Attorney:

Cantor Colburn LLP

Primary Examiner:

Colin W Slifka

Int. Cl.
CPC ...
C23C 22/42 (2006.01); C23C 2/26 (2006.01); C23C 2/40 (2006.01); C23C 22/47 (2006.01); C23C 22/73 (2006.01); C23C 22/82 (2006.01); C23C 28/00 (2006.01);
U.S. Cl.
CPC ...
C23C 22/42 (2013.01); C23C 2/26 (2013.01); C23C 2/40 (2013.01); C23C 22/47 (2013.01); C23C 22/73 (2013.01); C23C 22/82 (2013.01); C23C 28/00 (2013.01); C23C 2222/10 (2013.01);
Abstract

A surface treatment solution composition for forming an inorganic film, comprising: 10 to 30% by weight of a trivalent chromium compound containing chromium phosphate (A) and chromium nitrate (B) and satisfying a content ratio A/(A+B) of 0.3 to 0.6; 5 to 50% by weight of a silane compound; 0.2 to 3% by weight of a vanadium-based rust-inhibiting and corrosion-resisting agent; 0.5 to 5% by weight of a cobalt-based rust-inhibiting and corrosion-resisting agent; and 12 to 84.3% by weight of water, an alloyed hot-dip galvanized steel sheet surface-treated using the composition, and a method for manufacturing the alloyed hot-dip galvanized steel sheet, are provided, and the surface treatment solution composition containing the trivalent chromium compound has an excellent effect on corrosion resistance, blackening resistance, fuel resistance, weldability, and alkali resistance.

Find Patent Forward Citations

Loading…