| abstract |
PROBLEM TO BE SOLVED: To produce an aluminum coating material with improved adhesion between an undercoating type chromate film and a hydrophilic film provided thereon to prevent peeling of the aluminum coating material. Providing a way. SOLUTION: An aluminum plate material is treated with a surfactant or an alkaline agent containing a surfactant and a chelating agent, After washing with water and then in an inert gas atmosphere at 100 ° C. to 300 ° C. or in an atmosphere at 100 ° C. to 200 ° C., 4 mg /% of an organic substance containing a surfactant, a chelating agent and a non-degreased rolling oil on the surface of the aluminum plate is added. A method for producing an aluminum coating material in which the coating is subjected to heating and drying until it reaches m 2 or less, followed by cooling, application of a coating type chromate solution, heating and drying and cooling, and then providing a hydrophilic coating on the coating. |