Fabrication of Cr coating on AZ31 magnesium alloy by magnetron sputtering

来源期刊：中国有色金属学报(英文版)2008年增刊第1期

论文作者：吴国松 汪爱英 丁克俭 徐采云 代伟 徐爱娇

文章页码：329 - 333

Key words：magnesium alloy; Cr coating; magnetron sputtering; corrosion

Abstract: Chromium-plating is considered an effective method to improve surface properties of metal materials. Magnetron sputtering was applied to prepare Cr coating on AZ31 magnesium alloy and the influence of bias voltage on properties of Cr coating was investigated. The obtained coatings present an (110) preferred texture and have a developed columnar structure. With increasing bias voltage, the surface structure of Cr coating becomes denser. All of the Cr-coated AZ31 have much higher surface microhardness than bare AZ31. The Cr coating deposited on AZ31 at bias voltage of -150 V has a higher corrosion potential than others. The result of the immersion test shows that it decreases the damaged area compared with bare AZ31. The failure of the coated AZ31 is mainly attributed to the existence of through-thickness defects in the coating.

基金信息：the Natural Science Foundation of Ningbo City, China