Alcan International Limited

Christopher Pargeter

Mark H Foster

Dianne M Jenkins

As a lubricant for cold-working of metal there is provided on the surface of the metal to be subjected to working a solid film of a saturated aliphatic monohydric alcohol having 14 to 18 carbon atoms. After the metal has been worked, the solid lubricant may be removed by heating without causing staining of the metal surface. The solid lubricant film may additionally contain from 1 to 10% by weight of a polybutene, petroleum jelly or butyl stearate to modify the properties of the lubricant film.

Non-staining solid lubricants

Porous anodic aluminum oxide sheet, when removed from its aluminum metal substrate, is a useful filter but rather brittle. It can be formed into a desired shape by flexing in a direction transverse to the direction in which the metal substrate was rolled. Or the sheet can be wetted to make it more flexible and then formed by flexing in any direction. The formed sheet can be heat-set in a desired shape by heating at 200.degree. C. to 650.degree. C.

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Banbury, United Kingdom

Christopher Pargeter