混合树脂粉末对换流站阀冷系统6063铝合金腐蚀的影响  

Effect of Mixed Resin Powders on 6063 Aluminum Alloy Corrosion in Valve Cooling System at Converter Station

作　　者：宋小宁 程一杰 杨磊 朱志平[2] SONG Xiaoning;CHENG Yijie;YANG Lei;ZHU Zhiping(Power Science Research Institute of Zhejiang Electric Power Co.,Ltd..Hangzhou 310014,China;School of Chemical and Biological Engineering,Changsha University of Science and Technology,Changsha 410014,China)

机构地区：[1]国网浙江省电力有限公司电力科学研究院,杭州310014 [2]长沙理工大学化学与生物工程学院,长沙410014

出　　处：《腐蚀与防护》2020年第2期39-44,共6页Corrosion & Protection

基　　金：国网浙江省电力有限公司科研项目(5211DS160023)。

摘　　要：通过浸泡腐蚀试验及电化学试验研究了混合树脂粉末对阀冷系统6063铝合金腐蚀行为的影响。结果表明:随着浸泡时间的延长,阴阳树脂分解产物与溶出物含量增多,溶液酸化,表现为溶液电导率上升,pH下降;混合树脂粉末、电流均会加速6063铝合金的腐蚀;电化学测试表明混合树脂粉末使6063铝合金的自腐蚀电位负移,自腐蚀电流密度增大;随着浸泡时间的延长,电化学阻抗谱中容抗弧半径减小,极化电阻减小,即混合树脂粉末溶液中铝合金的耐腐蚀性能降低,腐蚀加快。因此,在实际应用中应该考虑阀冷系统中混合树脂粉末对6063铝合金的腐蚀问题,并采取相应的防护措施。The effects of mixed resin powders on the corrosion behavior of 6063 aluminum alloy were investigated by immersion corrosion test and electrochemical test.The results showed that with the prolongation of immersion time,the concentrations of decomposition products and soluble substances of anion resin and cation resin increased,and the solution acidified,which resulted in the increase of conductivity and the decrease of pH value for the solution.The current and the mixed resin powders could accelerate the corrosion of 6063 aluminum alloy.The electrochemical tests showed that in the mixed resin powder solution,the free corrosion potential of 6063 aluminum alloy decreased and the free corrosion current density increased.With the prolongation of immersion time,both the radius of tolerance arc in the EIS spectrum and the polarization resistance decreased,which means that the corrosion resistance of aluminum alloy was reduced and the corrosion was accelerated.Therefore,in the practical application of the valve cooling system,the corrosion of the mixed resin powders to 6063 aluminum alloy should be considered and the corresponding protective measures should be taken.

关 键 词：阀冷系统 6063铝合金 UP6150混合树脂粉末 电流 腐蚀 

分 类 号：TG172[金属学及工艺—金属表面处理]