高文平,谢俊峰,计玲,赵密锋,梁建军,梁伟,吕祥鸿,赵国仙.苛刻环境中钛合金石油管材的抗腐蚀性能研究[J].稀有金属材料与工程,2018,47(1):151~156.[Gao Wenping,Xie Junfeng,Ji Ling,Zhao Mifeng,Liang Jianjun,Liang Wei,Lv Xianghong,Zhao Guoxian.Study on the Corrosion Resistance of Titanium Alloy OCTG in Severe Environment[J].Rare Metal Materials and Engineering,2018,47(1):151~156.]
苛刻环境中钛合金石油管材的抗腐蚀性能研究
投稿时间:2016-11-28  修订日期:2016-11-28
中文关键词:  TC4钛合金  CO2腐蚀  腐蚀速率  SCC  点蚀电位  极化电阻
基金项目:国家自然科学51271146;陕西省自然科学基础研究计划2016JM5064;陕西省石油专用管腐蚀与防护重点科技创新团队基金;
中文摘要:
      通过高温高压腐蚀速率和应力腐蚀开裂(SCC)性能评价试验,辅以原位电化学测试分析,研究TC4钛合金石油管材在苛刻CO2环境中的腐蚀行为和耐蚀机理。结果表明:TC4钛合金在高温高压CO2腐蚀环境中具有极其优越的抗均匀腐蚀、局部腐蚀和SCC性能,在高达220℃的温度条件下均匀腐蚀速率仅为0.0012mm/a。TC4钛合金在CO2环境中的阳极极化曲线均有明显钝化区,腐蚀反应为阳极过程控制;随温度升高,TC4钛合金的自腐蚀电位降低,极化电阻减小,电化学腐蚀的热力学驱动力增大,而动力学阻滞性能减弱,腐蚀速率增大;但在高温CO2腐蚀环境中,TC4钛合金的保护电位和点蚀电位较高,仍具有良好的钝化和再钝化能力,其在180℃时的极化电阻高达2328.2Ω.cm2,具有良好的抗CO2腐蚀性能。
Study on the Corrosion Resistance of Titanium Alloy OCTG in Severe Environment
英文关键词:TC4 titanium alloy  CO2 corrosion  Corrosion rate  SCC  Pitting potential  Polarization resistance.
英文摘要:
      The corrosion behavior and corrosion mechanism of TC4 titanium alloy OCTG in severe CO2 environment were studied with high temperature and high pressure and stress corrosion cracking (SCC) test, as well as electrochemical in-situ measurement techniques. The results show TC4 titanium alloy dominates the excellent resistance to uniform corrosion, local corrosion and SCC in high temperature and high pressure CO2 corrosion environment, and the uniform corrosion rate is only 0.0012mm/a at the temperature up to 220℃. The anodic polarization curves of TC4 titanium alloy have the obvious passivation zone in CO2 environment, and the corrosion reaction is controlled by anodic process. With temperature increased, the corrosion potential and polarization resistance of TC4 titanium alloy decrease, which indicate that the thermodynamic driving force increase, while the dynamic resistance decrease of the electrochemical corrosion, thus the corrosion rate of TC4 titanium alloy increase. However, the protective potential and pitting potential of TC4 titanium alloy are higher enough in high temperature CO2 corrosion environment, and the polarization resistance is up to 2328.2Ω.cm2 at 180℃, which still give TC4 titanium alloy the good passivation and re-passivation ability and the superior resistance to CO2 corrosion at high temperature.
作者单位E-mail
高文平 西安石油大学材料科学与工程学院 13772072471@sina.cn 
谢俊峰 中国石油塔里木油田分公司油气工程研究院  
计玲 中国石油新疆油田分公司工程技术研究院  
赵密锋 中国石油塔里木油田分公司油气工程研究院  
梁建军 中国石油新疆油田分公司工程技术研究院  
梁伟 西安石油大学材料科学与工程学院  
吕祥鸿 西安石油大学材料科学与工程学院  
赵国仙 西安石油大学材料科学与工程学院  
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