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:
Dec. 22, 1981
Filed:
Dec. 17, 1980
Applicant:
Inventors:
Nobuyuki Oda, Yokohama, JP;
Haruyoshi Terada, Tanashi, JP;
Assignee:
Nihon Parkerizing Co., Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C23F / ;
U.S. Cl.
CPC ...
148 / ; 148-617 ;
Abstract
A conversion coating solution for treating metallic surfaces has a pH value in the range of 3 to 6 and contains 1 g/l to 50 g/l of an acid alkali phosphate as phosphate ions, 0.2 g/l to 20 g/l of one or more of chlorates and bromates, and 0.01 g/l to 0.5 g/l of tin ions, with a weight ratio of chlorine ions to tin ions being between 0.6 and 6. The solution provides a continuous and uniform conversion coating having high anti-corrosion performance.