Relation Between Surface Potential of Metals and Adhesive Property of Organic Coatings

(2) Effect of the Phosphoric Acid Treatment of Aluminium on its Surface Potential and Adhesion of Organic Coatings

Abstract

The surface potential of aluminium decreases and the adhesion of organic coatings to that metal increases in strength when its surface is chemically treated with a mixture of phosphoric acid and ethylalcohol, and there exists an approximately proportional relationship between the degree of decrease in surface potential and the degreee of increase in adhesive strength. The reason why the adhesive strength of organic coatings was increased by such a surface treatment of aluminium has been discussed.