Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403

공학

한국표면공학회지 (49권2호 130-134)

Effects of Metal Anion Complexes in Electrolyte on the Properties of Anodic Oxide Films on ADC12 Al Alloy


Yoo, Hyeonseok;Lee, Chulho;Oh, Kiseok;Choi, Jinsub;


Department of Chemistry and Chemical Engineering Center for Molecular Catalysts and Applications (BK21 plus program) Inha University;

DOI : 10.5695/JKISE.2016.49.2.130

Abstract

The anodization of ADC12 aluminum alloy was investigated in the metal anionic acid media. Anodic oxide films containing foreign elements were formed on ADC12 Al alloy by anodization in the anion complex solution. Furthermore, the rough surface and cracks were considerably smoothened by the deposit of metal anions. When the size of metal anion was small, relatively large amount of metal anions was loaded in anodic films. Existence of $MoO_3$, $TiO_2$ and MgO was confirmed by XPS. According to the results of Tafel analysis, Mo oxide represented the most noble anti-corrosion potential due to $MoS_2$ formation. Corrosion current densities were generally higher than that of pristine anodic oxide without anion complexes.

Keywords

Anion complex;ADC12;Aluminum alloy;Anodization;