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《Materials for Mechanical Engineering》 2015-04
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Influence of Minor Ag on Electrochemical Corrosion Behavior of Sn-9Zn Alloy

ZHAO Bai-sen;FU Tian;MA Rui;ZHAO Guo-ji;School of Mechanical Engineering,Chongqing Industry Polytechnic College;  
Electrochemical testing,scanning electron microscopy(SEM)observation,energy spectrum analysis were used to study the influence of minor Ag addition on the electrochemical corrosion behavior of Sn-9Zn alloy in 3.5wt.% NaCl solution.The results indicate that the galvanic corrosion reaction in the Sn-9Zn alloy was uniform due to its uniform microstructure.As the anode of the galvanic corrosion reaction,Zn phase almost completely dissolved and reacted in the Sn-9Zn alloy surface.Ag-Zn intermetallic compounds(IMCs)appeared in the Sn-9Zn alloy added with 0.5wt% Ag.An uneven composition and microstructure of the Sn-9Zn-0.5Ag alloy resulted in the galvanic corrosion reaction lopsided and uneven.The corrosion potential shift slightly,and another galvanic corrosion reaction using Sn-rich phase as anode and Ag-rich phase as cathode occurred.
【Fund】: 重庆市教委科研项目(KJ132105);; 重庆工业职业技术学院科研项目(GZY201210-YK)
【CateGory Index】: TG174.36
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