固溶处理对Al-Zn-In-Mg-Ti-Mn合金电化学性能的影响

腐蚀科学与防护技术, 2009, 21(3): 285-287.

固溶处理对Al-Zn-In-Mg-Ti-Mn合金电化学性能的影响

焦孟旺文九巴赵胜利郭炜马景灵李光福

河南科技大学材料科学与工程学院

洛阳 471003

School of Materials Science and Engineering

Henan University of Science&

Technology

基金项目: 洛阳市科技攻关项目（0701025A）

关键词：牺牲阳极 , electrochemical property , current efficiency , EIS

EFFECT OF SOLUTION TREATMENT ON ELECTROCHEMICAL PERFORMANCE OF Al-Zn-In-Mg-Ti-Mn ALLOYS

JIAO Meng-wang WEN Jiu-ba ZHAO Sheng-li GUO Wei MA Jing-ling LI Guang-fu

Keywords： sacrificial anode , 电化学性能 , 电流效率 , 电化学阻抗谱

研究了510℃×10 h固溶处理对Mn含量不同的Al-Zn-In-Mg-Ti-Mn合金在人造海水中的腐蚀电化学性能的影响.结果表明：固溶处理使该合金的电流效率下降，但对其自腐蚀电位影响不大；当合金中Mn含量较高时，固溶处理可改善其腐蚀过程中的表面腐蚀状况，降低工作电位，而电流效率下降不大;等效电路R_S(C₁(C₂R_t)(QR)(L₁R_ad1)(L₂R_ad2)(L₃R_ad3))能较好地拟合该合金在3%NaCl溶液中腐蚀的EIS谱，基本反映了其电化学腐蚀过程.

Al-Zn-In-Mg-Ti-Mn alloys containing different manganese contents as anode materials were solution treated at 510℃ for 10 h.The effect of heat treatment on electrochemical performance of the alloy such as operating potential,dissolution of anode and current efficiency,as well as their electrochemical bebavior in artificial seawater were researched.The results show that solution treatment reduces the current efficiency of aluminum alloys,but the effect of solution treatment on the open circuit potential is not apparent.When the manganese content is high,solution treatment can improve the surface dissolution status and decrease the operating potential with the current efficiency dropped little.EIS of Al-Zn-In-Mg-Ti-Mn alloy in 3%NaCl solution are farewell fitted with an equivalent circuit R_S(C₁(C₂R_t)(QR)(L₁R_ad1)(L₂R_ad2)(L₃R_ad3))precisely,which can primarily reveal the nature of electrochemical corrosion process.

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