Production of aluminum or aluminum alloy material having superior adhesion to coating film

Abstract

Abstract PURPOSE:To produce an Al material having superior adhesion to a coating film by piercing a specified percentage by area of micropores having a specified diameter and a specified depth in the surface of an Al material by electrolytic etching in a soln. contg. a specified amt. of Cl ions. CONSTITUTION:An Al or Al alloy material is immersed in a soln. contg. 0.5-50wt.% Cl ions and 5-60%, preferably about 20-50% by area of micropores having >=200Angstrom , preferably about 200-3,000Angstrom diameter and <=5mum, preferably about 0.02-3mum depth are pierced in the surface of the Al material by electrolytic etching. An Al material having satisfactory adhesion to a coating film of PVC resin-based paint, etc., and suitable for can ends is obtd.

Inventors

• 👤 Motohiro Nanbae
• 👤 難波江　元広
• 👤 Toshihiro Yoshida
• 👤 吉田　敏裕

Bibliographic Details