Inconel 718合金在高酸性石油井下工具服役环境中的应力腐蚀开裂行为
Stress Corrosion Cracking Behavior of Inconel 718 Alloy in Highly Acidic Downhole Environment
摘 要
利用高温高压釜和有限元技术研究了Inconel 718合金在150℃、3.5 MPa H2S分压、3.5 MPa CO2分压、含100 g/L Cl-水溶液中的SCC敏感性。结果表明：在模拟高温高酸性工况下，未发现Inconel 718合金发生点蚀和应力腐蚀开裂。拉扭复合载荷对Inconel 718合金耐蚀性的影响体现在拉扭复合载荷作用下材料产生的Von Mises等效应力对其耐蚀性的影响。
复合载荷
高温高酸
应力腐蚀开裂
Inconel 718 alloy
complex load
high temperature and high sour environment
stress corrosion cracking
Abstract
Finite element technology and high temperature high pressure reactor were used to investigate the SCC sensibility of Inconel 718 under the conditons of 150℃, 3.5 MPa H2S partial pressure, 3.5 MPa CO2 partial pressure and 100 g/L Cl- concentration aqueous solution. The results showed that Inconel 718 alloy was not susceptible to SCC and pitting in the simulated high temperature and high sour environment. The effect of tensile and torsional complex load on the anti-corrosion properties of Inconel 718 alloy was from Von Mises equivalent stress.
中图分类号 TG174.2 DOI 10.11973/fsyfh-201711006
所属栏目 试验研究
基金项目 国家科技重大专项（2016ZX0521005）；中国石化科技部攻关项目（P14113）
收稿日期 2016/3/8
修改稿日期
网络出版日期
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引用该论文: LI Hang,ZHANG Rui,MA Lanrong,LU Minxu,LI Dapeng. Stress Corrosion Cracking Behavior of Inconel 718 Alloy in Highly Acidic Downhole Environment[J]. Corrosion & Protection, 2017, 38(11): 848
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参考文献
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【4】王文明,张毅. Cl-浓度对双相钢和镍基合金腐蚀速率的影响[J]. 腐蚀与防护,2012,33(7):596-600.
【5】邓洪达,崔世华,李春福,等. 镍基合金G3在高含H2S和CO2环境中的腐蚀行为[J]. 腐蚀与防护,2013,34(4):302-306.
【6】赵雪会,白真权,尹成先,等. H2S/CO2环境下两种镍基合金的腐蚀行为[J]. 腐蚀与防护,2010,31(10):752-755.
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【13】ESMAEILJ F. Corrosion behaviors of two types of commercial stainless steel after plastic deformation[J]. J Mater Sci Technol,2010,26(9):833-838.
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