交流电干扰下Q235钢与铜在不同含水量北京土壤中的短期腐蚀行为
Short-term Corrosion Behavior of Q235 Steel and Cu with AC Interference in Beijing Soil with Different Soil Moisture Contents
摘 要
利用电化学测试和埋片试验研究了交流电干扰下Q235钢和铜在不同含水量北京土壤中短期腐蚀行为。结果表明：交流电对Q235钢与铜的腐蚀起到明显促进作用，对铜影响更大；交流电与土壤含水量对Q235钢的影响有明显的交互作用，对铜则无明显的影响；交流电主要影响材料的阳极反应过程，含水量主要影响材料的阴极反应过程；土壤含水量未达到饱和时，Q235钢与铜表面均发生腐蚀，且随着土壤含水量的增加，腐蚀均逐渐加重，其表面点蚀坑密度和深度均逐渐减小；在土壤含水量达到饱和时，Q235钢与铜表面均又出现较严重点蚀。
土壤含水量
腐蚀电流密度
点蚀
alternating current (AC)
soil moisture content
corrosion current density
pitting
Abstract
The corrosion behavior of Q235 steel and Cu was studied by polarization curve and buried sample experiment in Beijing soil with different soil moisture contents for a short time. Results indicate that alternating current played an obvious role in promoting the corrosion of Q235 steel and Cu, especially for Cu. Obvious interaction was observed between the influence of alternating current and soil moisture on Q235 steel, while the effect of those on Cu was slight. In fact, alternating current had primary effect on the anodic process and soil moisture content mainly influenced the cathodic process. When the soil moisture content was unsaturated, corrosion was found on the surface of both Q235 steel and Cu, and aggravated with the increase of soil moisture content, whereas the density and depth of pitting gradually decreased. However, severe pitting appeared on the surface of Q235 and Cu when the soil moisture was saturated.
中图分类号 TG172 DOI 10.11973/fsyfh-201608001
所属栏目 试验研究
基金项目 国家自然科学基金重点项目（51131001）； 国家自然科学基金（51471034; 51371036）
收稿日期 2015/11/20
修改稿日期
网络出版日期
作者单位点击查看
联系人作者杜翠薇(dcw@ustb.edu.cn)
备注杜翠薇(1972-),教授,博士,从事金属腐蚀与防护研究
引用该论文: SU Geng,DING De,LI Cai-yu,DU Cui-wei,LIU Zhi-yong,YANG Xiao-jia. Short-term Corrosion Behavior of Q235 Steel and Cu with AC Interference in Beijing Soil with Different Soil Moisture Contents[J]. Corrosion & Protection, 2016, 37(8): 613
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【4】LIU Z Y,DU C W,WANG F M,et al. Stress corrosion cracking of welded API X70 pipeline steel in simulated underground water[J]. Journal of Materials Engineering and Performance,2013,27(11)：2550-2556.
【5】LIU Zhi-yong,CUI Zhong-yu,LIi Xiao-gang,et al. Understand the occurrence of pitting corrosion of pipeline carbon steel under cathodic polarization[J]. Electrochemical Acta,2012,60(15)：259-263.
【6】LIU Z Y,LI X G,CHENG Y F,et al. Mechanistic aspect of near-neutral pH stress corrosion cracking of pipelines under cathodic polarization[J]. Corrosion Science,2012,55：54-60.
【7】ZHU Min,DU Cui-wei,LI Xiao-gang,et al. Effect of AC current density on stress corrosion cracking behavior of X80 pipeline steel in high pH carbonate/bicarbonate solution[J]. Electrochemical Acta,2014,117(20)：351-359.
【8】KUANG D,CHENG Y F. Understand the AC induced pitting corrosion on pipelines in both high pH and neutral pH carbonate/bicarbonate solutions[J]. Corrosion Science,2014,85：304-310.
【9】WANG L W,WANG X H,CUI Z Y,et al. Effect of alternating voltage on corrosion of X80 and X100 steel in a chloride containing solution-investigated by AC voltammetry technique[J]. Corrosion Science，2014，86:213-222.
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【11】MOHAMMED A A,SAYED S A E,ESSAM E F E S. AC and DC studies of the pitting corrosion of Al in perchlorate solutions[J]. Electrochemical Acta,2006,51(22)：4754-4764.
【12】朱敏,杜翠薇,李晓刚,等. Cu在北京土壤环境中的腐蚀行为[J]. 中国腐蚀与防护学报,2014，33（4）：306-310.
【13】朱敏,杜翠薇,李晓刚,等. Q235钢在北京土壤环境中的腐蚀行为[J]. 中国腐蚀与防护学报,2013,33(3):199-204.
【14】余建飞,陈心河,李善风,等. Q235钢在湖北变电站土壤中的腐蚀行为研究[J]. 全面腐蚀控制,2011,25（10）：39-45.
【15】朱敏,刘智勇,杜翠薇,等. 交流电对X80钢在酸性土壤环境中腐蚀行为的影响[J]. 材料工程,2015,43（2）：85-90.
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【17】马珂,曹备,陈杉檬. 含水率对Q235钢土壤腐蚀行为的影响[J]. 腐蚀与防护,2014,35（9）：922-924.
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