Corrosion behavior of A6061 aluminum alloy in cation containing aqueous medium
Md. Saiful Islam, Masatoshi Sakairi
Abstract
Corrosion behavior of A6061 aluminum alloy in cation containing simulated aqueous medium was investigated by surface analysis techniques and electrochemical tests. The mass of specimens was increased after the immersion tests, and a smaller mass change was observed in the Zn2+ containing solution. Electron microscopic images showed the deposited products on the specimen that were Al-hydroxide confirmed by X-ray photoelectron spectroscopy. Zn-layer was formed on the specimen immersed in Zn2+ containing solution, and corrosion inhibition of Al resulted in a smaller number of Al products deposited on the alloy surface. Electrochemical results showed higher impedance in the Zn2+ containing solution due to the formation of the Zn related layer on the surface with oxide film.