COATING METHOD WITH FLUORORESIN

摘要

PURPOSE:To economically produce a fluororesin coated body having fine appearance by finely roughening the surface of a base material such as Al by chemical etching, chemically treating the roughened surface with an alkali or a halogen free acid and coating the treated surface with fluororesin. CONSTITUTION:The surface of Al or Al alloy is finely roughened by chemical or electrochemical etching. The roughened surface is chemically treated with an alkali such as NaOH or a halogen free acid such as sulfuric acid so that the weight of the surface is reduced by <=50g/m<2> and then the treated surface is coated with fluororesin. A fluororesin coated body having high adhesive strength of the fluororesin coating layer to the base material and fine appearance can be economically produced.