交流杂散电流作用下碳钢在土壤模拟溶液中的腐蚀
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摘要
深入研究碳钢在交流作用下的腐蚀状况具有十分重要的意义。采用自行设计搭建的交流电流腐蚀试验装置,通过测试碳钢接地材料在土壤模拟溶液中的腐蚀电位、电化学曲线及腐蚀失重数据,对其在交流电杂散电流作用下的腐蚀状况进行研究,以期掌握在交流杂散电流作用下土壤中碳钢的腐蚀倾向和速率。结果表明:在杂散电流作用下,碳钢在土壤模拟溶液中的腐蚀倾向增大,且碳钢的腐蚀速率随着电流密度的增大而加快。
A corrosion testing apparatus at AC current was self-designed and constructed,and the corrosion potential,electrochemical curves and corrosion weight-loss data of carbon steel grounding materials in simulated soil solution were obtained,which were employed to investigate the corrosion behaviors of samples under AC stray current to master the corrosion tendency and rate of carbon steel grounding materials under AC stray current. Results showed that under the AC stray current,the corrosion tendency of carbon steel in simulated oil solution increased,and the corrosion rate of carbon steel could be improved by the increase of current density.
A corrosion testing apparatus at AC current was self-designed and constructed,and the corrosion potential,electrochemical curves and corrosion weight-loss data of carbon steel grounding materials in simulated soil solution were obtained,which were employed to investigate the corrosion behaviors of samples under AC stray current to master the corrosion tendency and rate of carbon steel grounding materials under AC stray current. Results showed that under the AC stray current,the corrosion tendency of carbon steel in simulated oil solution increased,and the corrosion rate of carbon steel could be improved by the increase of current density.
引文
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[10]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.
[11]杜晨阳,曹备,吴萌顺.交流电干扰下-850 m V(CSE)阴极保护电位准则的实用性研究[J].腐蚀与防护,2009,30(9):655-659.
[2]GOIDANICH S,LAZZATI L,ORMELLESE M.AC Corrosion-Part 1:Effect on overportentials of anodic and cathodic processes[J].Corrosion Science,2010,52:491-497.
[3]李自力,杨燕.金属材料交流腐蚀机理、影响因素及风险评价[J].化工学报,2011,62(7):1 790-1 799.
[4]马金福,张鹏,冯斌,等.交流干扰对阴极保护下X80管线钢腐蚀行为的影响[J].腐蚀与防护,2012,33(2):9-12.
[5]姜子涛,杜艳霞,董亮,等.交流电对Q235钢腐蚀电位的影响规律研究[J].金属学报,2011,47(8):997-1 002.
[6]LALVANI S B,LIN X A.A theoretical approach for predicting AC-induced corrosion[J].Corrosion Science,1994,36(6):1 039-1 046.
[7]GOIDANICH S,LAZZATI L,ORMELLESE N.AC Corrosion-Part 2:Parameters influencing corrosion rate[J].Corrosion Science,2010,52:916-922.
[8]GUMMOW R A,WAKELIN R G,SEGALL S M.AC corrosion-A new challenge to pipeline integrity:Corrosion 98[C].Houston:NACE International,1998:566/1-566/18.
[9]GREGOOR R.Detection and assessment of alternating current corrosion[J].Materials Performance,2000,39(3):34-37.
[10]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.
[11]杜晨阳,曹备,吴萌顺.交流电干扰下-850 m V(CSE)阴极保护电位准则的实用性研究[J].腐蚀与防护,2009,30(9):655-659.