Lubricant for forming aluminum and aluminum alloy plates,...

C - Chemistry – Metallurgy – 10 – M

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

Patent

CA 2179416

A lubricant for forming aluminum and aluminum alloy plates, which is easy to remove after the formation and assembly of the plates, enables the plates to be bonded or welded as coated with the lubricant, and provides the strength of bonding or welding equal to that observed when the lubricant is absent. The lubricant comprises mainly polyalkylene oxide or a derivative thereof and a salt of a higher fatty acid and contains preferably water. The content of the oxide or derivative is 50-2 wt.% and the ratio of the salt to the oxide ranges from 1/12 to 1/4. The lubricant is suitable for the formation of an aluminum plate or an aluminum alloy plate, when it is applied to the surface of the plate in the form of solid coating in a coating weight of 0.2-2.0g/m2.

L'invention concerne un lubrifiant utilisé pour former des plaques en aluminium ou en alliage d'aluminium qui est facile à enlever après la formation et l'assemblage des plaques. Ce lubrifiant permet de coller ou de souder les plaques à mesure qu'elles sont enduites du lubrifiant et permet d'obtenir une résistance d'adhérence ou de soudure égale à celle observée en l'absence de lubrifiant. Ledit lubrifiant comporte principalement de l'oxyde de polyalkylène ou un dérivé de celui-ci, et un sel d'acide gras supérieur et, de préférence, de l'eau. La teneur en oxyde ou dérivé est de 50 à 2 % en poids, et le rapport sel/oxyde va de 1/12 à 1/4. Ce lubrifiant convient pour former une plaque en aluminium ou en alliage d'aluminium lorsqu'il est appliqué sur la surface de la plaque sous forme de revêtement solide à raison de 0,2 à 2,0 g/m?2¿.

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