Effect of residual and external stress on corrosion behaviour of X80 pipeline steel in sulphate-reducing bacteria environment
作者： Xue Li , Fei Xie , Dan Wang , Changhao Xu , Ming Wu
DOI: 10.1016/J.ENGFAILANAL.2018.04.016
关键词: Anode 、 Metallurgy 、 Residual stress 、 Dielectric spectroscopy 、 Corrosion 、 Stress concentration 、 Dissolution 、 Slow strain rate testing 、 Materials science 、 Stress (mechanics)
摘要: Abstract X80 pipeline steel has a wide application prospect. This is easily affected by sulphate-reducing bacteria (SRB) in neutral soil and causes stress-corrosion cracking. Based on the results of static dynamic electrochemical tests, corrosion behaviour mechanism under synergistic effect stress SRB Shenyang environment were investigated through slow strain rate testing, impedance spectroscopy, potentiodynamic polarisation technique surface analysis techniques. Results showed that internal residual external tensile accelerate steel, influenced type. When only applied, adsorption film plays certain protective role, which reduces sensitivity its anode dissolution rupture. play role concentration at crack tip, thereby increasing steel. The then activated dissolution.
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