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氯离子和温度对铝合金在冷却液中腐蚀的影响

陈鑫 田文明 李松梅 高叔伦 刘建华

陈鑫, 田文明, 李松梅, 等 . 氯离子和温度对铝合金在冷却液中腐蚀的影响[J]. 北京航空航天大学学报, 2016, 42(10): 2243-2249. doi: 10.13700/j.bh.1001-5965.2015.0627
引用本文: 陈鑫, 田文明, 李松梅, 等 . 氯离子和温度对铝合金在冷却液中腐蚀的影响[J]. 北京航空航天大学学报, 2016, 42(10): 2243-2249. doi: 10.13700/j.bh.1001-5965.2015.0627
CHEN Xin, TIAN Wenming, LI Songmei, et al. Effect of chloride ion and temperature on corrosion of aluminum alloy in coolant[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(10): 2243-2249. doi: 10.13700/j.bh.1001-5965.2015.0627(in Chinese)
Citation: CHEN Xin, TIAN Wenming, LI Songmei, et al. Effect of chloride ion and temperature on corrosion of aluminum alloy in coolant[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(10): 2243-2249. doi: 10.13700/j.bh.1001-5965.2015.0627(in Chinese)

氯离子和温度对铝合金在冷却液中腐蚀的影响

doi: 10.13700/j.bh.1001-5965.2015.0627
基金项目: 国家自然科学基金(51271012)
详细信息
    作者简介:

    陈鑫,男,硕士研究生。主要研究方向:金属腐蚀与防护。Tel.:010-82317103,E-mail:1241296881@qq.com;李松梅,女,博士,教授,博士生导师。主要研究方向:材料电化学、微生物腐蚀、材料表面电化学改性等。Tel.:010-82317103,E-mail:songmei_li@buaa.edu.cn

    通讯作者:

    李松梅,Tel.:010-82317103,E-mail:songmei_li@buaa.edu.cn

  • 中图分类号: O646.6

Effect of chloride ion and temperature on corrosion of aluminum alloy in coolant

Funds: National Natural Science Foundation of China (51271012)
  • 摘要: 分别采用了动电位极化法、电化学阻抗法研究了不同温度下、不同氯离子浓度下防锈铝在模拟冷却液中的腐蚀行为,采用金相显微镜和扫描电镜对极化后防锈铝的表面特征进行了观察和记录。结果表明,氯离子吸附在防锈铝氧化膜表面,对氧化膜表面造成破坏。在一定温度下(30℃),当氯离子浓度超过0.01mol/L时,中间产物吸附作用就会增强,阻抗谱中低频区出现感抗弧,点蚀萌生。随着氯离子浓度增高(超过0.01mol/L),防锈铝的腐蚀加剧,耐腐蚀性能下降。随着温度的升高,阴极和阳极反应阻力变小,阳极金属铝的溶解和阴极氧还原速度增大,腐蚀速度增大。温度升高的同时,溶解氧含量下降,阴极反应受到抑制。与此同时扩散过程在整个腐蚀反应过程中的支配性降低,中间产物在氧化膜表面的吸附作用增强,从而导致低频容抗弧的出现。温度对点蚀形貌的影响主要体现在影响单个点蚀坑的几何大小,促进点蚀坑的生长。

     

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出版历程
  • 收稿日期:  2015-09-23
  • 网络出版日期:  2016-10-20

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