Method of powder coating weldable substrates

C - Chemistry – Metallurgy – 23 – C

Patent

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Details

C23C 4/00 (2006.01) B05D 5/06 (2006.01) B05D 7/00 (2006.01) C09D 5/03 (2006.01) C09D 7/12 (2006.01) C09D 133/06 (2006.01) C09D 163/00 (2006.01) C23C 4/02 (2006.01) C23D 3/00 (2006.01)

Patent

CA 2470942

A method of coating metallic substrates with weldable primer and at least one powder coating is provided by the present invention. The base powder coating contains flake pigments that align parallel to the surface when the powder coating is heated. Optionally, a clear top coating is applied over the base powder coating. Substrates coated by the method of coating are also provided. The method of coating allows substrates coated with weldable primer to be assembled into assemblies or finished parts by welding, and then to be coated with the powder basecoat and clear coat. The parts prepared have striking visual effects and performance comparable to conventional automotive parts but are prepared more efficiently and economically.

L'invention concerne un procédé d'enduction de substrats métalliques avec un apprêt pouvant être soudé et au moins un revêtement en poudre. Le revêtement en poudre de base contient des pigments lamellaires alignés parallèlement à la surface lorsque le revêtement en poudre est chauffé. Eventuellement, un enduit de finition clair est appliqué par dessus le revêtement en poudre de base. La présente invention concerne également des substrats enduits selon ce procédé. Le procédé décrit dans l'invention permet à des substrats recouverts de l'enduit pouvant être soudé, d'être assemblés en blocs ou en pièces finies par soudage, puis d'être recouverts avec le revêtement de base en poudre et l'enduit clair. Les pièces préparées présentent des effets visuels de martelage et des performances comparables aux pièces automobiles classiques, mais elles sont préparées de manière plus efficace et plus économique.

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