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. 28, 1976
Filed:
Sep. 27, 1974
Applicant:
Inventors:
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23F / ;
U.S. Cl.
CPC ...
148 / ; 148 / ; 106 14 ; 2523 / ;
Abstract
The corrosion protecting action of iron phosphate or zinc phosphate coatings on mild steel is markedly raised by treating with solutions of .alpha.-aminophosphonic or -phosphonous acids or their water soluble salts. Compounds having more than one amino and more than one phosphonic or phosphonous acid groups are also suitable. Paint films on metal surfaces pretreated in this manner show a considerably better adhesion than on untreated surfaces.