埋地金属管道交流干扰腐蚀
AC Interference Corrosion of Buried Metal Pipelines
摘 要
建立了埋地金属管道交流干扰腐蚀模拟试验装置, 研究了交流电流密度对交流腐蚀行为的影响。利用失重法测试了腐蚀速率, 采用体式显微镜观察了试样表面腐蚀产物的沉积, 用扫描电镜观察了腐蚀产物的微观形貌, 并监测了交流电流随时间的变化。结果表明, 利用电阻耦合的方式施加交流干扰, 腐蚀的严重程度与交流电流密度直接相关; 如果不对交流电源的输出进行调节, 交流电流密度会随着致密腐蚀产物的沉积而显著降低; 腐蚀产物特性对交流腐蚀严重程度有较大影响。
交流干扰腐蚀
腐蚀产物
电流密度
buried metal pipeline
AC interference corrosion
corrosion product
current density
Abstract
A simulation test fitting of AC interference corrosion of buried metal pipelines was established, and the influence of AC current density on corrosion behavior was studied. The rate of AC interference corrosion was calculated by weight loss method. The deposition of corrosion products on the steel surface was observed and the microscopic morphology of corrosion products was observed by scanning electron microscopy. The AC currents in different test periods were monitored. The results show that, if the AC interference is applied by resistance coupling method, the severity of AC interference corrosion will be directly related to the AC current. And if the output of AC power supply is not adjusted during the test, the AC current will decrease with the deposition of dense corrosion products. The character of corrosion products has a great influence on AC interference corrosion.
中图分类号 TG172.9
所属栏目 试验研究
基金项目 国家科技支撑计划(2012BAK13B04)
收稿日期 2012/7/13
修改稿日期
网络出版日期
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备注许立宁, 副教授, 博士,
引用该论文: XU Li-ning,ZHU Jin-yang,XU Xin,YU He-chu,LU Min-xu. AC Interference Corrosion of Buried Metal Pipelines[J]. Corrosion & Protection, 2013, 34(5): 388
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参考文献
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【2】Wakelin R G, R A Gummow, S M Segall.AC corrosion-case histories, test procedures and mitigation[C]//Houston:NACE,1998,Paper No.565.
【3】李自力, 杨燕.金属管道交流腐蚀研究新进展[J].石油学报, 2012, 33(1): 164-171．
【4】胡士信, 路民旭, 杜艳霞．管道交流腐蚀的新观点[J]．腐蚀与防护, 2010, 31(6): 419-424．
【5】Gummow R A, Wakelin R G, Segall S M. AC corrosion-a new challenge to pipeline integrity[C]//Houston::NACE,1998,Paper No.566.
【6】Nielsen L V, Galsgaard F. Sensor technology for on-line monitoring of AC-induced corrosion along pipelines[C]//Houston:NACE,2005,Paper No.375.
【7】Xu L Y, Su X, Yin Z X, et al. Development of a real-time AC/DC data acquisition technique for studies of AC corrosion of pipelines[J].Corrosion Science, 2012,61(1):215-223.
【2】Wakelin R G, R A Gummow, S M Segall.AC corrosion-case histories, test procedures and mitigation[C]//Houston:NACE,1998,Paper No.565.
【3】李自力, 杨燕.金属管道交流腐蚀研究新进展[J].石油学报, 2012, 33(1): 164-171．
【4】胡士信, 路民旭, 杜艳霞．管道交流腐蚀的新观点[J]．腐蚀与防护, 2010, 31(6): 419-424．
【5】Gummow R A, Wakelin R G, Segall S M. AC corrosion-a new challenge to pipeline integrity[C]//Houston::NACE,1998,Paper No.566.
【6】Nielsen L V, Galsgaard F. Sensor technology for on-line monitoring of AC-induced corrosion along pipelines[C]//Houston:NACE,2005,Paper No.375.
【7】Xu L Y, Su X, Yin Z X, et al. Development of a real-time AC/DC data acquisition technique for studies of AC corrosion of pipelines[J].Corrosion Science, 2012,61(1):215-223.
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