Process of coating metals prior to cold forming

Details Process of coating metals prior to cold forming Process of coating metals prior to cold forming

C - Chemistry, Metallurgy

23

C

C23C 22/00 (2006.01)

Patent

CA 2632575

A process of forming on a metal substrate a composition prior to the substrate being cold worked. The process includes a step of contacting the substrate with an aqueous composition comprising acid-stable particles and one or more fluoroacids. The amount of the acid-stable particles in the coating composition is from 0.005% to 8% by weight on a dry weight basis.

L'invention porte sur un procédé selon lequel on recouvre un substrat métallique d'une composition avant le formage à froid du substrat. Le procédé de l'invention consiste à mettre le substrat en contact avec une composition aqueuse comprenant des particules stables en milieu acide et au moins un fluoroacide. La quantité de particules stables en milieu acide dans la composition de revêtement est comprise entre 0,005 % et 8 % en poids par rapport au poids sec.

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