Conductive, organic coatings with low layer thickness and...

C - Chemistry – Metallurgy – 23 – C

Patent

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Details

C23C 22/82 (2006.01) C09D 5/08 (2006.01) C09D 5/24 (2006.01) C09D 163/00 (2006.01) C09D 175/04 (2006.01)

Patent

CA 2674338

The invention relates to a metal sheet, or a component made of a metallic material, comprising a layer system on the surface with at least the following layers: a) a conversion layer, comprising no more than 1 mg chromium per m2, b) a layer of a cross-linked organic polymer system with a thickness in the range of 0.5 to 2.5 µm, comprising, in relation to the total mass of said layer, 2 to 25 wt.% of an electrically conductive pigment having a specific weight of 3 g/cm3 maximum, however no more than 5 wt. % of the electrically conductive pigment having a specific weight of more than 3 g/m3. A coating material and a coating method for the production of the layer b).

Tôle ou élément structurel en un matériau métallique, portant sur sa surface un système de couches comprenant au moins les couches suivantes : a) une couche de conversion contenant au maximum 1 mg de chrome par m~; b) une couche d'un système polymère organique réticulé ayant une épaisseur comprise dans la plage de 0,5 à 2,5 µm et contenant, par rapport à la masse totale de cette couche, 2 à 25 % en poids d'un pigment électriquement conducteur ayant un poids spécifique de 3 g/cm3maximum, cependant pas plus de 5 % en poids de pigment électriquement conducteur ayant un poids spécifique supérieur à 3 g/m3. L'invention concerne également un produit de revêtement et un procédé de revêtement pour la réalisation de la couche b).

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