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《Materials for Mechanical Engineering》 2015-09
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Effects of Na_2MoO_4 on Electrochemical Behaviors of AZ61 Magnesium Alloy

YU Zu-xiao;HAO Shi-xiong;College of Materials and Chemical Engineering,Sichuan University of Science & Engineering,Material Corrosion and Protection Key Laboratory of Sichuan Province;  
In order to improve activation properties and prohibit corrosion of AZ61 magnesium alloy anode,some effects of Na2MoO4 on electrochemical behaviors of AZ61 magnesium alloy were studied in the MgSO4 solution added respectively by 0,0.5wt%,1.0wt%,2.0wt% and 5.0wt% Na2MoO4.The results show that Na2MoO4 not only sharply prohibited corrosion of AZ61 magnesiuma alloy,but also increased its activation degree.When the content of Na2MoO4 was 2.0wt%,the corrosion-inhibition ratio of AZ61 magnesium alloy was 68.4%and the activation degree was the highest,the electric current density up to 18.5 mA·cm-2 at-1.25 V,the negative shift of open circuit potential,activation electric potential were the largest,and they were-1.39Vand-1.37 V,respectively.Inhibition mechanism of the inhibiter Na2MoO4 was anode inhibiting corrosion.
【Fund】: 材料腐蚀与防护四川省重点实验室科研基金资助项目(2010CL03)
【CateGory Index】: TG146.22;TG178
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