Patent ID: 6919302

Claim:
A method of treating a metal surface, comprising the step of applying to the metal surface an oil composition for temporarily protecting and lubricating the metal surface, said method being further characterized by the step of choosing said composition to contain: at least 30% of at least one saturated or unsaturated C ≦18 fatty acid triglyceride (compound A); from 5 to 30% of at least one C ≦18 fatty acid triglyceride with an oleic acid content of at least 60% by weight (compound B); from 5 to 30% of at last one ester derived from the condensation of a C 1 -C 12 , preferably C 1 -C 2 , aliphatic alcohol with a C ≦18 fatty acid (compound C); and optionally, from 5 to 20% of at least one amide derived from the condensation of a C ≦18 fatty acid and a C 2 -C 6 monoalkanolamine, dialkanolamine or trialkanol-amine (compound D).