Effect of solid-solution treatment on corrosion and electrochemical behaviors of Mg-15Y alloy in 3.5 wt.% NaCl solution

作     者：张新 张奎 李兴刚 邓霞 李永军 马鸣龙 石阳 

作者机构：State Key Laboratory for Fabrication and Processing of Nonferrous MetalsGeneral Research Institute for Nonferrous Metals Military Representative Office of People's Liberation Army Stationed in 618 Factory 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2012年第30卷第11期

页      面：1158-1167页

核心收录：

学科分类：080503[工学-材料加工工程] 0709[理学-地质学] 0819[工学-矿业工程] 08[工学] 0708[理学-地球物理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：supported by the National Key Technology R&D Program of China (2011BAE22B01) 

主　　题：Mg-15Y alloy polarization curves oittin corrosion solid-solution treatment rare earths 

摘      要：The effect of solid-solution treatment on corrosion and electrochemical mechanisms of Mg-15Y alloy in 3.5 wt.% NaCl solution was investigated by electrochemical testing, immersion testing and SEM observation. The results indicated that the corrosion resistance of Mg-15Y sample gradually deteriorated with immersion time increasing, which was consistent with the observation of corrosion morphologies. The solid-solution treatment decreased the amounts of second phase Mg24Ys. The Ecor~ and corrosion rate of as-cast samples were both lower than those of solid solution-treated samples, and both increased with increment of solid solution-treated time. The corrosion mechanism was proposed for the galvanic, pitting and filiform corrosion which varied with the immersion time and solid-solution treatment.