EP 0064295 A1 19821110 - Method of improving the corrosion resistance of chemical conversion coated aluminum.
Title (en)
Method of improving the corrosion resistance of chemical conversion coated aluminum.
Title (de)
Verfahren zur Verbesserung des Korrosionswiderstandes von durch chemische Umwandlung beschichtetem Aluminium.
Title (fr)
Procédé pour l'amélioration de la résistance à la corrosion d'aluminium enduit par conversion chimique.
Publication
Application
Priority
US 26037081 A 19810504
Abstract (en)
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)
Citation (search report)
- US 3779818 A 19731218 - SHOEMAKER C
- US 4098720 A 19780704 - HWA CHIH M
- DE 3030815 A1 19810326 - FUJI PHOTO FILM CO LTD [JP]
- US 4108689 A 19780822 - PETER WOLFGANG, et al
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