X100管线钢鹰潭土壤模拟溶液中腐蚀行为的研究  

Corrosion Behavior of X100 Pipeline Steel in Simulated Solution of Yingtan Soil

作　　者：杨旭 孙福洋 李丹平 YANG Xu;SUN Fuyang;LI Danping(Xi'an Special Equipment Inspection Institute,Xi'an 710065,China;Xi'an Maurer Petroleum Engineering Laboratory Co.,Ltd.,Xi'an 710065,China)

机构地区：[1]西安特种设备检验检测院,西安710065 [2]西安摩尔石油工程实验室有限公司,西安710065

出　　处：《腐蚀科学与防护技术》2019年第6期615-621,共7页Corrosion Science and Protection Technology

基　　金：原国家质量监督检验检疫总局科技计划项目(2017QK069)~~

摘　　要：采用失重法、线性极化曲线和阻抗谱电化学技术,结合SEM、EDS和XRD研究了SRB+IOB对X100管线钢在鹰潭土壤模拟溶液中腐蚀行为的影响。结果表明:X100管线钢在无菌环境下的腐蚀为中度腐蚀,腐蚀速率随浸泡时间的增加先减小,后缓慢增大,腐蚀产物主要为Fe2O3。有菌(SRB+IOB)环境下浸泡5 d后的腐蚀为严重腐蚀,浸泡17和40 d后的腐蚀为中度腐蚀,腐蚀速率随浸泡时间的增加不断减小,腐蚀产物主要为FeS和Fe2O3。X100管线钢在无菌环境下的腐蚀倾向为随浸泡时间的增加不断增大,在有菌(SRB+IOB)环境下为不断减小。腐蚀速率在无菌环境下为先迅速减小后缓慢增大,在有菌(SRB+IOB)环境下为不断迅速减小。SRB+IOB的存在加剧了X100管线钢的腐蚀。The effect of sulfate reduction bacteria(SRB)and aerobic ferric oxidation bacteria(AFOB)on the corrosion behavior of X100 pipeline steel in a simulated solution of the soil at Yingtan district was investigated by means of mass-loss measurement,linear polarization curve measurement,electrochemical impedance spectroscopy,SEM,EDS and XRD.Results show that in the sterile simulated solution,X100 pipeline steel suffered from moderate corrosion.With the increasing time,the corrosion rate of the steel decrease first and then increase slowly.The corrosion product in the sterile simulated solution is Fe2O3.After soaking for 5 d in the simulated solution with both SRB+IOB the steel suffered from severe corrosion,while after soaking for 17 and 40 d the corrosion turned to be moderate corrosion and the corrosion rate decreases with time constantly.Correspondingly,the corrosion products are FeS and Fe2O3.In conclusion,with the increasing time,the corrosion tendency of X100 pipeline steel in the sterile simulated solution increases constantly,while in the simulated solution with SRB+IOB decreases constantly.Accordingly,the corrosion rate of X100 pipeline steel in the sterile simulated solution first decreases quickly and then increases slowly,while in the solution with SRB+IOB decreases quickly.The corrosion of X100 pipeline steel is aggravated by SRB+IOB.

关 键 词：X100管线钢 鹰潭土壤 模拟溶液 腐蚀行为 

分 类 号：TG172[金属学及工艺—金属表面处理]