| abstract |
A process for coating a substrate A process for coating a metal substrate, comprising: (a) contacting metal, comprising: (a) contacting at least a part of the metal substrate with at least one part of the metal substrate with a pretreatment composition comprising: (i) a pretreatment composition comprising: (i) a source of a group IIIB metal and / or a metal source of a group IIIB metal and / or a group metal IVB, and (ii) a source of copper; and to cl of group IVB, and (ii) a source of copper; and then (b) contacting at least one parontinuation (b) contacting at least a part of the metal substrate with a composition that cites the metal substrate with a composition comprising (i) a film-forming resin, ( i) a film-forming resin, and (ii) a source of yttrium. and (ii) a source of yttrium. |