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:
Aug. 30, 2016
Filed:
Mar. 06, 2013
Applicant:
Ppg Industries Ohio, Inc., Cleveland, OH (US);
Inventors:
Richard M. Vargas, Mayfield Village, OH (US);
John F. McIntyre, Bay Village, OH (US);
Assignee:
PPG Industries Ohio, Inc., Cleveland, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F 1/64 (2006.01); C23C 22/82 (2006.01); C23C 22/86 (2006.01); C02F 1/76 (2006.01); C23C 22/08 (2006.01); C23C 22/36 (2006.01); C02F 1/00 (2006.01);
U.S. Cl.
CPC ...
C02F 1/64 (2013.01); C02F 1/766 (2013.01); C23C 22/08 (2013.01); C23C 22/361 (2013.01); C23C 22/86 (2013.01);
Abstract
Disclosed are methods for treating and coating a ferrous metal substrate, such as cold rolled steel, hot rolled steel, and electrogalvanized steel. These methods include contacting the ferrous metal substrate with an aqueous pretreatment composition comprising: (a) a Group IIIB and/or IVB metal compound; (b) phosphate ions; and (c) water. Also disclosed are off-shift methods of removing iron from the pretreatment bath.