Method of depositing a protective surface layer on a very thin metal sheet

摘要

A method of depositing an oil containing protective surface layer on a very thin metal sheet preferably intended for packing purposes. The very thin metal sheet, in the form of a band and at a band speed of up to 600 m/min, is electrostatically coated with a mixture comprising 1 to 2 parts of an ester of sebacic acid, azelaic acid, or citric acid, and 1 part of a high molecular monobasic acid having the general formula CH3 (CH2)n CON(CH3)CH2COOH. The coating is formed in a layer of 1 to 10 mg/m2 of surface of the metal sheet.