The corrosion mechanisms of X80 steel under conditions containing elemental sulfur (S) were investigated in a supercritical CO₂-saturated aqueous phase environment. The uniform corrosion rate slightly increased with immersion time in the absence of S, while it decreased with immersion time in the presence of S, and pitting was induced. There were two polymorphs of FeOOH in this study: α-FeOOH, which formed in an S-free environment by conversion of Fe(NO₃)₃; γ-FeOOH, which formed in the presence of S by conversion of FeSO₄. There were also two polymorphs of Fe₂O₃: α-Fe₂O₃ could be formed by Fe(OH)₃ in both environments, while γ-Fe₂O₃ could be formed from α-FeOOH in an S-free environment or γ-FeOOH in the presence of S. The S could cause pitting through the acid regeneration cycle reaction and occluded corrosion defects. Moreover, FeS gradually replaced FeCO₃ to protect the substrate in the S-containing environment.

在超临界 CO ₂饱和水相环境中研究了 X80 钢在含元素硫 (S) 条件下的腐蚀机制。在没有 S 的情况下，均匀腐蚀速率随浸泡时间略有增加，而在 S 存在的情况下，随着浸泡时间的延长，均匀腐蚀速率略有增加，并诱发点蚀。本研究中有两种 FeOOH 多晶型物：α-FeO​​OH，它在无硫环境中通过 Fe(NO ₃ ) _{3 的}转化形成；γ-FeOOH，它在 S 的存在下通过 FeSO ₄的转化形成。Fe ₂ O ₃也有两种多晶型：α-Fe ₂ O ₃可以由 Fe(OH) ₃形成在这两种环境中，γ-Fe ₂ O ₃可以在无 S 环境中由 α-FeO​​OH 或在 S 存在下由 γ-FeOOH 形成。 S 可以通过酸再生循环反应引起点蚀和闭塞腐蚀缺陷。此外，FeS逐渐取代FeCO ₃以保护含S环境中的基材。