Method and composition for surface treatment

C - Chemistry – Metallurgy – 23 – C

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6/225, 117/228

C23C 18/12 (2006.01) C09D 1/00 (2006.01)

Patent

CA 1337145

A hydrous oxide sol such as a zirconia sol is applied to a solid e.g. metal surface and there cured to form a protective coating. The sol may include an adhesion promoter such as a silane and/or a sub-micron passenger powder. Application to the surface may be in one step, or two steps with the second designed to gel the sol. Depending on the microtexture of the sol and the surface, the treatment can be used to control, by increasing or decreasing, the adhesive properties of the surface to a subsequently applied organic coating, or simply to improve corrosion resistance.

608068

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