A process for the coating of metallic surfaces with a...

Details A process for the coating of metallic surfaces with a... A process for the coating of metallic surfaces with a...

C - Chemistry, Metallurgy

10

M

C10M 173/02 (2006.01) C10M 111/04 (2006.01)

Patent

CA 2713541

The invention relates to a method for preparing metal workpieces for cold forming by first applying a phosphate layer and then applying a lubricant layer which has a major content in organic polymer material. The phosphate layer is formed by an aqueous acidic phosphating solution having a major content in calcium, magnesium or/and manganese and phosphate. The lubricant layer is formed by contacting the phosphated surface with an aqueous lubricant composition which has a content in organic polymer material based on ionomer and optionally also non-ionomer, the organic polymer material used predominantly being monomers, oligomers, co-oligomers, polymers or/and copolymers based on ionomer, acrylic acid/methacrylic acid, epoxide, ethylene, polyamide, propylene, styrene, urethane, the ester(s) or/and salt(s) thereof. The invention also relates to the corresponding lubricant composition, to the lubricant layer produced thereof and to its use.

L'invention concerne un procédé de préparation de pièces métalliques au formage à froid, d'abord par l'application d'une couche de phosphate, puis par l'application d'une couche de lubrifiant contenant principalement un matériau polymère organique, la couche de phosphate étant formée d'une solution de phosphatation acide aqueuse qui contient principalement du calcium, du magnésium et/ou du manganèse et du phosphate, la couche de lubrifiant étant formée par mise en contact de la surface phosphatée avec une composition de lubrifiant aqueuse qui contient un matériau polymère organique à base d'un ionomère et éventuellement également d'un non-ionomère, le matériau polymère organique utilisé étant principalement des monomères, oligomères, co-oligomères, polymères et/ou copolymères à base d'un ionomère, acide acrylique/méthacrylique, époxy, éthylène, polyamide, propylène, styrène, uréthane, leur(s) ester(s) et/ou leur(s) sel(s). L'invention porte également sur la composition de lubrifiant correspondante, la couche de lubrifiant en étant formée et son utilisation.

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