Finite Element Simulation of Pitting Corrosion of Super 13Cr Stainless Steel in High-temperature and High-pressured CO2 Containing Artificial Formation Waters
The pitting growth behavior of super 13Cr stainless steel in high-temperature and high-pressured CO2 containing artificial formation waters was comparatively assessed via immersion corrosion test and finit element simulation,focusing on the effect of corrosion time,temperature and partial pres-sure of CO2 on pitting corrosion.The results show that the pitting depth of super 13Cr stainless steel after high-temperature and high-pressure corrosion tests is consistent with that of finite element simulation,and the average pitting depth increases with the increase of immersion time,temperature and CO2 partial pressure.The finite element simulation shows that the interior of the pit is acidified due to cationic hydroly-sis,and the pH value decreases with the decrease of temperature and the increase of CO2 partial pres-sure.In addition,Fe2+concentration inside the pit increases with the increase of corrosion time and tem-perature while the partial pressure of CO2 has little effect.
super 13Cr stainless steelpittingfinite element simulationhigh temperature and pres-sure
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