文章摘要
二元铝合金在碱性介质中的腐蚀与电化学行为
Corrosion and electrochemical behavior of binary aluminum alloy in alkaline medium
  
DOI:
中文关键词: 铝合金  腐蚀  自腐蚀电位  电极电位  电化学性能
英文关键词: allloy  corrosion  corrosion potential  electrode potential  electrochemical performance
基金项目:长沙市科技局项目(K071521-11)
作者单位
马正青,曾波伟,滕昭阳 中南大学 材料科学与工程学院湖南 长沙 410083 
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中文摘要:
      研究Al-Me(Me:Mg,Zn,Bi,Sn,Pb,In,Ga)二元合金在25 ℃ 4 mol/L NaOH碱性介质中的析氢腐蚀速率、自腐蚀电位、恒电流极化电极电位.结果表明:在25 ℃ 4 mol/L NaOH碱性介质中,纯铝中加入 Zn或In的Al-Me二元合金析氢腐蚀速率增大,自腐蚀电位负移;加入Bi或Ga的Al-Me二元合金析氢速率影响不大,自腐蚀电位负移;添加Mg,Sn或Pb的Al-Me二元合金析氢速率降低,自腐蚀电位正移.当以100 mA/cm2的电流密度进行恒电流极化时,Mg,Zn,Bi,In能使Al-Me二元合金电极电位稍有负移,Sn,Pb,Ga能使Al-Me二元合金电极电位大幅度负移.
英文摘要:
      The corrosion rate of hydrogen evolution, open circuit potential, galvanostatic polarizations electrode potential of Al-Me (Me: Mg, Zn, Bi, Sn, Pb, In, Ga) binary alloy in 25 ℃ 4 mol/L NaOH alkaline medium was studied respectively.The results showed that the hydrogen evolution rate of aluminium alloy slight increment when the Zn, In elements is putted in the pure Al, when Bi, Ga elements is added to the pure Al, the hydrogen evolution rate of aluminium alloy has no influence ,but the corrosion potential of aluminium alloy shifte positively .In contrast, the hydrogen evolution rate of aluminium alloy reduce to some extent, the corrosion potential shifte negatively when other elements(Mg,Sn,Pb)is added to the pure Al .Besides,the electrode potential of Al-Me binary alloy shift negatively slightly when Mg,Zn,Bi,In is putted in pure Al.the electrode potential of Al-Me binary alloy shift positively substantially when Sn,Pb,Ga is added to pure Al.
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