Methods for passivating a metal substrate and related coated...

Details Methods for passivating a metal substrate and related coated... Methods for passivating a metal substrate and related coated...

C - Chemistry, Metallurgy

23

C

C23C 22/10 (2006.01) C25D 13/20 (2006.01)

Patent

CA 2746742

Disclosed are methods for passivating metal substrates, including ferrous substrates, such as cold rolled steel and electrogalvanized steel. The methods comprise the steps of depositing an electropositive metal onto at least a portion of the sub-strate, followed immediately by electrophoretically depositing on the substrate a curable, electrodepositable coating composition. The present invention also relates to coated substrates produced by the above methods.

La présente invention concerne des procédés de passivation de substrats métalliques, notamment de substrats ferreux tels que l'acier laminé à froid et l'acier électrozingué. Les procédés consistent à déposer un métal électropositif sur au moins une partie du substrat, puis à déposer juste après, par voie électrophorétique, une composition pour dépôt électrolytique durcissable. La présente invention concerne également des substrats avec revêtement obtenus par ces procédés.

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