X70钢在大庆两种土壤中的腐蚀行为
Corrosion Behavior of X70 Steel in Daqing Soils
摘 要
采用弱极化和电化学阻抗谱(EIS)方法、宏观观察、SEM观察、能谱(EDS)分析及失重法研究了X70管线钢在大庆两种土壤中的腐蚀行为.结果表明,X70钢在大庆粉沙土中主要发生全面腐蚀,在粘土中则以局部腐蚀为主;X70钢试样表面所形成的腐蚀产物膜不致密,不能对基体起到良好的保护作用;随着埋样时间增加,X70钢在两种土壤中腐蚀速率呈现下降的趋势,在粘土中的腐蚀速率远大于在粉沙土中的腐蚀速率.
土壤腐蚀
大庆土
X70 steel
soil corrosion
Daqing soil
Abstract
The corrosion behavior of X70 steel in Daqing soils was studied by means of weak polarization curve technique,EIS,macroscopic observations,SEM,EDS and weight-loss method.The results revealed that localized corrosion on the X70 steel surface mainly occurred in clay,while general corrosion mainly occurred in silt.The corrosion products were primarily iron oxide which can not protect the substrate of X70 steel because of its loose structure.The corrosion rate of the steel decreased with the increasing corrosion time,and the corrosion rate in clay was much greater than that in silt.
中图分类号 TG172.4
所属栏目 试验研究
基金项目
收稿日期 2007/9/26
修改稿日期 2007/10/22
网络出版日期
作者单位点击查看
引用该论文: LU Xin-ru,DU Cui-wei,LI Xiao-gang,QU Liang-shan. Corrosion Behavior of X70 Steel in Daqing Soils[J]. Corrosion & Protection, 2008, 29(9): 503～506
被引情况:
【1】李发根,邵晓东,李磊,高万夫, "16Mn钢土壤腐蚀行为研究",腐蚀与防护 31, 933-935(2010)
【2】申博著,韩鹏举,张文博, "X70钢在不同含水量砂土中的腐蚀电化学行为",腐蚀与防护 36, 157-161(2015)
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参考文献
【1】李晓刚,杜翠薇,董超芳,等.X70钢的腐蚀行为与试验研究[M].北京:科学出版社,2006.
【2】吴荫顺.金属腐蚀研究方法[M].北京:冶金工业出版社,1993.
【3】董超芳,李晓刚,武俊伟.土壤腐蚀的实验研究与数据处理[J].腐蚀科学与防护技术,2003,15(3):154.
【4】López E,Osella A,Martino L.Controlled experiments to study corrosion effects due to external varying fields in embedded pipelines[J].Corrosion Science,2006,48:389-403.
【2】吴荫顺.金属腐蚀研究方法[M].北京:冶金工业出版社,1993.
【3】董超芳,李晓刚,武俊伟.土壤腐蚀的实验研究与数据处理[J].腐蚀科学与防护技术,2003,15(3):154.
【4】López E,Osella A,Martino L.Controlled experiments to study corrosion effects due to external varying fields in embedded pipelines[J].Corrosion Science,2006,48:389-403.
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