Mechanism of Mn on inhibiting Fe-caused magnesium corrosion

作     者：Lei Yang Shouzhen He Chao Yang Xiaorong Zhou Xiaopeng Lu Yuanding Huang Gaowu Qin Erlin Zhang 

作者机构：Key Laboratory for Anisotropy and Texture of MaterialsEducation Ministry of ChinaSchool of Materials Science and EngineeringNortheastern UniversityShenyang 110819China State Key Laboratory of Rolling and AutomationNortheastern UniversityShenyang 110819China Corrosion and Protection CentreSchool of MaterialsThe University of ManchesterManchester M139PLEnglandUK Shenyang National Laboratory for Materials ScienceNortheastern University3-11 Wenhua RoadShenyang 110819China Institute of Materials ResearchHelmholtz Zentrum GeesthachtMax-Planck-Str.1D-21502 GeesthachtGermany 

出 版 物：《Journal of Magnesium and Alloys》 (镁合金学报（英文）)

年 卷 期：2021年第9卷第2期

页      面：676-685页

核心收录：

学科分类：080503[工学-材料加工工程] 0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：financial support by the National Nature Science Foundation of China(No.51601036 and U1737102) the Fundamental Research Funds for the Central Universities(N170204010 and N162410002-2-4) Young Elite Scientists Sponsorship Program by CAST(2017QNRC001) 

主　　题：Magnesium alloy Impurity Fe Mn phase Corrosion Cathodic activation 

摘      要：In the present study,to understand the mechanism of Mn on inhibiting Fe-caused Mg corrosion,the corrosion behaviour of commercial pure Mg and Mg-6 Mn alloy in 0.6 M NaCl solution is *** is found that in Mg-6 Mn alloy,Fe impurity is incorporated into Mn to form Mn(Fe)phase with Fe as solid *** initial galvanic corrosion cannot be reduced through converting Fe-rich phase to Mn(Fe)phase,since Mn(Fe)phase also has relatively strong cathodic activity and has much larger volume fraction than Fe-rich ***,the cathodic activation behaviour of pure Mg is *** cathodic activity even decreases for Mg-Mn alloy with increased exposure time,due to the reduced cathodic HER at the Mn(Fe)*** can be oxidized at the OCP of Mg-6 Mn alloy,resulting in relatively dense Mn-rich corrosion film on particle surface,which separates the particle from the electrolyte and,consequently,inhibits HER.