交流杂散电流密度对X80管线钢腐蚀行为的影响
Effects of AC Stray Current Density on Corrosion Behavior of X80 Pipeline Steel
摘 要
采用自主设计的试验装置，通过电化学试验和浸泡试验对不同交流杂散电流密度下X80管线钢的腐蚀行为进行了研究。结果表明：交流干扰对X80管线钢阴极极化的影响程度远大于对其阳极极化的影响，在产物膜的形成速率与溶解速率相差不大时，极化曲线表现为两个零电流电位；交流杂散电流密度较高时，最大蚀坑深度显著增加，X80管线钢的腐蚀形态由均匀腐蚀向点蚀转变；交流杂散电流密度大于100 A/m2时，用局部腐蚀速率评价X80管线钢的腐蚀程度更合理。
X80管线钢
土壤模拟溶液
极化曲线
AC stray current density
X80 pipeline steel
soil simulation solution
polarization curve
Abstract
The corrosion behavior of X80 pipeline steel at different AC stray current densities was studied by electrochemical test and immersion test with self-designed test equipment. The results show that the effect of alternating current (AC) interference on the cathodic polarization was more than on the anodic polarization for X80 pipeline steel. When the formation rate of the corrosion scale was close to its dissolution rate, there were two values of free corrosion potential in the polarization curve. With the continuous increase of AC stray current density, the maximum depth of corrosion pit increased significantly, and corrosion form gradually changed from uniform corrosion to pitting corrosion. When AC stray current density was more than 100 A/m2, it was more reasonable to use the localized corrosion rate as the evaluation indicator for corrosion of X80 pipeline steel.
中图分类号 U177 TG172 DOI 10.11973/fsyfh-201802010
所属栏目 试验研究
基金项目 国家自然科学基金（51301201）；山东省自然科学基金（ZR2013EMQ014）
收稿日期 2016/8/3
修改稿日期
网络出版日期
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联系人作者寇杰(chuyunk@126.com)
引用该论文: KOU Jie,FU Yu. Effects of AC Stray Current Density on Corrosion Behavior of X80 Pipeline Steel[J]. Corrosion & Protection, 2018, 39(2): 124
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参考文献
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【3】李自力,孙云峰,刘静,等. 埋地油气管道交流干扰腐蚀及防护研究进展[J]. 腐蚀科学与防护技术,2011,23(5):376-380.
【4】杨晓洪,陈敬和,胡士信,等. 交流输电线路对输油输气管道的电磁影响现场测试研究[J]. 腐蚀与防护,2012,33(2):23-29.
【5】李自力,杨燕. 金属材料交流腐蚀机理、影响因素及风险评估[J]. 化工学报,2011,62(7):1790-1799.
【6】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.
【7】朱敏,杜翠薇,李晓刚,等. 交流电频率对X65钢在CO32-/HCO3-溶液中腐蚀行为的影响[J]. 材料工程,2014(11):85-89.
【8】许立宁,朱金阳,徐欣,等. 埋地金属管道交流干扰腐蚀[J]. 腐蚀与防护,2013,34(5):388-398.
【9】WENT J L,CHIN D T. The a.c. corrosion of stainless steel-Ⅱ:the breakdown of passivity of SS304 in neutral aqueous solution[J]. Corrosion Science,1985,25(10):889-900.
【10】胥聪敏,国蓉,胡海军,等. X80管线钢在海滨盐碱土壤模拟溶液中的耐腐蚀性能研究[J]. 钢铁研究学报,2010,22(3):42-46.
【11】胥聪敏. X80管线钢在模拟盐碱土壤介质中的电化学腐蚀行为研究[J]. 材料工程,2009(9):66-70.
【12】曹楚南. 腐蚀电化学原理[M]. 北京:化学工业出版社,2004.
【13】CHIN D T,SACHDEV P. Corrosion by alternating current: polarization of mild steel in neutral electrolytes[J]. Electrochemical Science and Technology,1983,130(8):1714-1718.
【14】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):997-1002.
【15】FU A Q,CHENG Y F. Effects of alternating current on corrosion of a coated pipeline steel in a chloride-containing carbonate/bicarbonate solution[J]. Corrosion Science,2010,52(2):612-619.
【16】ZHANG J M,ZUO Y. Anodic polarization behaviors of carbon steel in bicarbonate solution[J]. Electrochemistry,2005,11(1):27-31.
【17】LU Z P,HUANG C B,HUANG D L,et al. Effects of a magnetic field on the anodic dissolution passivation and transpassivation behavior of iron in weakly alkaline with or without halides[J]. Corrosion Science,2006,48(10):3049-3077.
【18】董亮,路民旭,杜艳霞,等. 埋地管道交流腐蚀的研究进展[J]. 中国腐蚀与防护学报,2011,31(3):173-178.
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