Cathodic electrolysis method of depositing cerium Conversion Films on industrial pure aluminum

摘要

Two two-step techniques, called TS2/TS7 and TS3/TS7, respectively, have been developed to form cerium conversion films on the surface of industrial pure aluminum. The tested material was cathodically electrolyzed in the al- kaline solution containing cerium salt, and uniform films containing cerium were obtained after the two-step treatment. It is found that the films obtained by TS2/TS7 and TS3/TS7 techniques are about 4.0 and 3.0 um in thickness, respectiv- Ely. The material has better corrosion resistance in the chloride solution after the two-step electrolysis treatent compar- Ed with the one-step treated and naked specimens.