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.:
Date of Patent:
Oct. 26, 1999
Filed:
Apr. 07, 1992
Applicant:
Inventors:
Shuji Gomi, Chiba, JP;
Seiji Nakajima, Chiba, JP;
Hisatada Nakakoji, Chiba, JP;
Nobuyuki Morito, Chiba, JP;
Assignee:
Kawasaki Steel Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D / ;
U.S. Cl.
CPC ...
428614 ; 428658 ; 428659 ; 428935 ; 428623 ; 428633 ; 428632 ; 148262 ; 205316 ; 205319 ;
Abstract
A Zn or part-Zn plated steel sheet has an MgO coating free of metallic Mg thereon which increases corrosion resistance and plating adherence. The MgO coating is formed by coating according to the sol-gel method or by dipping or treating by cathodic electrolysis a Zn or part-Zn plated steel sheet in a molten salt bath mainly containing a magnesium salt.