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:
Sep. 02, 2003
Filed:
Nov. 21, 2001
Applicant:
Inventors:
Rajat K. Agarwal, Brighton, MI (US);
Douglas Brown, San Francisco, CA (US);
William E. Fristad, Rochester Hills, MI (US);
Graham Butcher, Buckingham, GB;
Zafar Iqbal, Batley, GB;
Assignee:
Henkel Corporation, Gulph Mills, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D 3/10 ; B05D 1/36 ; B05D 1/18 ;
U.S. Cl.
CPC ...
B05D 3/10 ; B05D 1/36 ; B05D 1/18 ;
Abstract
The anticorrosive properties of a coating autodeposited on a metal substrate are improved by contacting the autodeposited coating with an aqueous solution containing Group IIA or Group IIB metal cations (e.g., calcium or zinc cations) and phosphate anions prior to curing. The rinse solution is preferably acidic and can be prepared, for example, from calcium nitrate and an oxy acid of phosphorus or zinc dihydrogen phosphate. Optionally, the rinse solution also includes an accelerator such as hydroxylamine.