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电化学(中英文) ›› 2007, Vol. 13 ›› Issue (4): 411-414. 

• 研究论文 • 上一篇    下一篇

电化学方法研究氯气冷凝器的腐蚀

向斌;陈文;黄文章;邢少华;张胜涛;   

  1. 重庆大学化学化工学院,重庆大学化学化工学院,重庆科技学院,重庆大学化学化工学院,重庆大学化学化工学院 重庆400044,重庆400044,重庆400012,重庆400044,重庆400044
  • 收稿日期:2007-11-28 修回日期:2007-11-28 出版日期:2007-11-28 发布日期:2007-11-28

Study on the Corrosion of Chlorine Condenser by Electrochemical Method

XIANG Bin1,CHEN Wen1,HUANG Wen-zhang2,XING Shao-hua1,ZHANG Sheng-tao1   

  1. (1.College of Chemistry & Chemical Engineering,Chongqing University,Chongqing 400044,China,2.Chongqing University of Science & Technology,Chongqing University,Chongqing 40001,China
  • Received:2007-11-28 Revised:2007-11-28 Published:2007-11-28 Online:2007-11-28

摘要: 冷凝器的腐蚀在氯碱工业中极为严重,并可酿成致命事故.常压冷凝器制造通常采用的钢材为16MnR和10#,焊接材料为J507.本文研究了上述3种材料在29.9%(by mass)的氯化钙溶液中的电化学行为,分析其腐蚀电流密度icorr和电化学阻抗参数变化规律.结果表明,在16MnR、10#和焊接材料的三相区,焊接材料腐蚀较快,为整体结构的薄弱点,因此氯气冷凝器需要定期检测和修复.

关键词: 冷凝器, 氯, 线性极化, 盐水浴, EIS

Abstract: Corrosion of condenser is very seriously in chlorine-alkali industry,which could lead to fatal disaster.The most commonly used material in low pressure condenser includes steel of 16MnR,10#,and welding rod of J507.Electrochemical analysis of the three materials in 29.9%(by mass) calcium chloride(CaCl2) solution was carried out.The corrosion current density icorr and impedance parameters of the three materials in 29.9% CaCl2 solution were estimated separately.The result showed that in the tripartite phase regions where the 10# seamless tube and 16MnR armor plate were jointed by welding,the weld was firstly eroded and suggested that the chlorine condenser should be examined and repaired every year.

Key words: condenser, chlorine, linear polarization, salt bath, EIS

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