二元铝合金在碱性介质中的腐蚀与电化学行为
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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/cm2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.
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.
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.
引文
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[2]Nestoridi M,Pletcher D,Wood R J K,et al.The study of aluminium anodes for high powerdensity Al/air batteries with brine electrolytes[J].Journal of Power Sources,2008,178(1):445-455.
[3]Smol J,Gudi C'S,Kuzmani C'N.Electrochemical properties of aluminium anodes for Al/air batteries with aqueous sodium chloride electrolyte[J].Journal of Applied Electrochemistry,2012,42(11):969-977.
[4]David R L.CRC Handbook of chemistry and physics[M].New York:CRC Press,2003.
[5]Xu R Z,Song G.Post-heat treatment of arc-sprayed coating prepared by the wires combination of Mg-cathode and Al-anode to form protective intermetallic layers[J].Applied Surface Science,2011,257(7):3097-3102.
[6]印永嘉.物理化学手册[M].北京:高等教育出版社,1988.
[7]Jeffrey P W,Halliop W,Smith F N.Aluminium anode alloys:The United States,4751086[P].1988-06-14.
[8]韩莉.高镁铝合金阳极材料的活性溶解特性及电化学性能研究[D].西安:西安科技大学,2007.
[9]Shayeb H E,Wahab F A E,Abedin S Z E.Electrochemical behaviour of Al,Al-Sn,Al-Zn,and AL-Zn-Sn alloys in chloride solution containing stannous ions[J].Corrosion Science,2001,43(4):655-662.
[10]Flamini D O,Saidman S B.Electrochemical behaviour of Al-Zn-Ga and Al-In-Ga alloys in chloride media[J].Materials Chemistry and Physics,2012,136(1):103-111.
[11]Sun D R,Zhao X C.Microstructure and properties of cast Al-Pb bearing alloy[J].Special Casting&Nonferrous Alloys,2000(3):24-26.
[12]Tuck C D S,Hunter J A.The electrochemical behavior of Al-Ga alloys in alkaline and neutral electrolytes[J].Journal of The Electrochemistry Society,1987,134(12):2970-2981.
[13]Ma Z Q,Li X X.The study on microstructure and electrochemical properties of Al-Mg-Sn-Ga-Pb alloy anode material for Al/AgO battery[J].Journal of Solid State Electrochemistry,2011(15):2601-2610.
[14]He J G,Wen J B,Li X D,et al.Influence of Ga and Bi on electrochemical performance of Al-Zn-Sn sacrificial anodes[J].Transaction of Nonferrous Metals Society of China,2011,21(7):1580-1586.