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溫度對13Cr不銹鋼在高CO2分壓環境中腐蝕行為的影響

Effect of temperature on the corrosion behavior of 13Cr stainless steel under a high CO2 partial pressure environment

  • 摘要: 通過高溫高壓電化學測試,獲得不同實驗溫度下13Cr不銹鋼的循環伏安曲線、交流阻抗譜和Mott-Schottky曲線,結合ZSIMPWIN軟件和掃描電子顯微鏡分析,研究高溫高CO2分壓環境下,溫度對13Cr不銹鋼腐蝕電化學行為的影響.在高溫高CO2分壓環境下,隨溫度升高,13Cr不銹鋼發生腐蝕的傾向增加,表面鈍化膜穩定性下降,點蝕敏感度增加.

     

    Abstract: This article is focused on the effect of temperature on the corrosion electrochemical behavior of 13Cr martensitic stainless steel under a high temperature and high CO2 partial pressure environment. Cyclic polarization(CP) measurements,electrochemical impedance spectroscopy(EIS),Mott-Schottky plot measurements,ZSIMPWIN software,and scanning electron microscopy(SEM) are used in this study. The results show that the stability of passive films formed on the 13Cr stainless steel surface decreases with increasing temperature under a high temperature and high CO2 partial pressure environment. This leads to increases in the corrosion rate and pitting susceptibility.

     

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