Formation of Nanoporous Structures on Planner Al-Zn Alloy Lining Layers by Anodic Oxidation

Abstract

We investigated the anodic oxidation of planner Al-Zn lining layer in a phosphoric acid solution to produce a nanoporous oxide film. The Al-Zn lining layer was produced by a sacrificial-core method using aluminum powder and zinc plate. No nanoporous structure was observed in the specimen after anodic oxidation at 50 V and 100 V for 7.2 ks. On the other hand, well-developed nanoporous structure was formed in the entire region in the case of 150 V for 7.2 ks or longer.