EP 0064295 B1 19851121 - METHOD OF IMPROVING THE CORROSION RESISTANCE OF CHEMICAL CONVERSION COATED ALUMINUM
Title (en)
METHOD OF IMPROVING THE CORROSION RESISTANCE OF CHEMICAL CONVERSION COATED ALUMINUM
Publication
Application
Priority
US 26037081 A 19810504
Abstract (en)
[origin: EP0064295A1] A method for treating aluminum prior to applying a chemical conversion coating for improving its corrosion resistance especially when rigid requirements need to be met. The aluminum is alkaline cleaned and deoxidized, preferably with a non-chromated deoxidizer. A supplementary treatment consists of immersing the deoxidized aluminum in a potassium or sodium nitrite solution. The aluminum is then coated with a standard chemical conversion coating, and dried at a temperature between 110 DEG F and 130 DEG F. The resulting product is able to pass salt spray test requirements as outlined in the military specification.
IPC 1-7
IPC 8 full level
C23C 22/78 (2006.01)
CPC (source: EP)
C23C 22/78 (2013.01)
Designated contracting state (EPC)
DE FR GB IT NL SE
DOCDB simple family (publication)
EP 0064295 A1 19821110; EP 0064295 B1 19851121; DE 3267535 D1 19860102
DOCDB simple family (application)
EP 82103813 A 19820504; DE 3267535 T 19820504