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:
Nov. 05, 2002
Filed:
May. 08, 2000
Gerald Adam Grab, Trenton, MI (US);
Kimberly A. Lazarz, Dearborn, MI (US);
Matthew John Zaluzec, Canton, MI (US);
Timothy Van Evans, Ann Arbor, MI (US);
Visteon Global Technologies, Inc., Dearborn, MI (US);
Abstract
The invention is a method of forming a conversion coating on an aluminum surface. According to the method, the aluminum surface is conversion coated by first treating the surface with thermal degreasing or aqueous alkaline degreasing and then contacting the treated surface with an aqueous bath solution of KF. The concentration of KF in the solution is 2.0-25.0 wt. % and the temperature is 90-212° F. for at least 5 seconds. The conversion coating consists essentially of: (a) substantially all K AlF or (b) a mixture comprising a major proportion of K AlF and a minor proportion of KAlF