石油领域耐蚀钛合金电化学特性与选材研究  

Research on electrochemical characteristics and material selection of corrosion resistant titanium alloy in petroleum field

作　　者：陈晨 双远华[3] 陈建勋 张跃忠 刘宝胜 张少华[2,3] Chen Chen;Shuang Yuanhua;Chen Jianxun;Zhang Yuezhong;Liu Baosheng;Zhang Shaohua(School of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China;Shanxi Engineering Research Center for Magnesium and Magnesium Alloys,Taiyuan 030024,China;College of Material Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China)

机构地区：[1]太原科技大学机械工程学院,山西太原030024 [2]山西省镁及镁合金工程技术研究中心,山西太原030024 [3]太原科技大学材料科学与工程学院,山西太原030024

出　　处：《轻金属》2023年第1期54-59,共6页Light Metals

基　　金：山西省科技重大专项项目(20191102009);山西省重点研发计划项目(201903D121049);太原科技大学博士科研启动基金(20202026)。

摘　　要：针对石油工业领域钛合金油井管选材困难的问题,本文以当前市场内较常规的四类钛及钛合金TA2(工业纯钛)、TA10(Ti-0.3Mo-0.8Ni)、TC4(Ti-6Al-4V)、TC4ELI(Ti-6Al-4VELI)为研究对象,利用腐蚀电化学原理分别在常温与加热状态下对上述材料进行耐蚀性能评估,腐蚀环境模拟油田井下含CO_(2)-H_(2)S-Cl^(-)-H_(2)O工况。研究结果表明:常温状态下,耐蚀性能TA2最优,TC4次优,TC4ELI再次优,TA10则相对较弱;当腐蚀环境温度升高时,材料耐蚀参数较常温状态均有所降低,同时其强弱顺序与常温状态也有所不同,依据各参数可确定耐蚀能力由强到弱依次为TC4ELI、TA2、TC4、TA10。试验结果可为油井管选材提供相应理论支持。In order to solve the problem of selecting titanium alloy oil well pipe materials in petroleum industry,this paper takes four kinds of conventional titanium and titanium alloys TA2(industrial pure titanium),TA10(Ti-0.3Mo-0.8Ni),TC4(Ti-6Al-4V)and TC4ELI(Ti-6Al-4VELI)in the current market as research objects.The corrosion electrochemical principle is used to evaluate the corrosion resistance of the above materials at room temperature and heated state,the corrosion environment is simulated under the underground conditions of CO_(2)-H_(2)S-Cl^(-)-H 2O in the oilfield.The research results show that at room temperature,the corrosion resistance of TA2 is the best,TC4 is the second,TC4ELI weaker than TC4 and TA10 is relatively weak.When the temperature of the corrosion environment increases(heated to 80℃),the corrosion resistance parameters of materials are reduced compared with those at room temperature,at the same time the strength order is also different from the room temperature state,according to the electrochemical parameters,it can be determined that the corrosion resistance is TC4ELI,TA2,TC4 and TA10 in the order from strong to weak.The test results can provide the corresponding theoretical support for the selection of oil well pipe materials.

关 键 词：石油领域 钛合金 电化学 耐蚀性 

分 类 号：TF82[冶金工程—有色金属冶金] TG146.23[一般工业技术—材料科学与工程]