Abstract Time dependent experiments were carried out to study the corrosion behaviour of Super 13Cr martensitic stainless steel after immersion in a H2S-saturated solution. The Point Defect Model was employed to obtain key parameters. With increasing immersion time, the corrosion product layer thickened, but displayed a defective structure. The thickness of the barrier layer decreased with extending the H2S-exposure time, which notably lowered the corrosion resistance. The presence of the corrosion scale resulted in a thinner barrier layer in contrast to that without the scale. With/without the corrosion scale, no semi-conductivity and no passive region was observed for Super 13Cr after 96 h-immersion. The hydrogen ingress during H2S-exposure lowered the passivity of the bare alloy substrate.

中文翻译：

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马氏体不锈钢浸入 H 2 S 饱和溶液后的电化学行为

摘要 通过时间相关实验研究了超级 13Cr 马氏体不锈钢浸入 H2S 饱和溶液后的腐蚀行为。点缺陷模型用于获取关键参数。随着浸泡时间的增加，腐蚀产物层增厚，但显示出有缺陷的结构。阻挡层的厚度随着硫化氢暴露时间的延长而减小，这显着降低了耐腐蚀性。与没有水垢的情况相比，腐蚀水垢的存在导致更薄的阻挡层。Super 13Cr 在浸泡 96 小时后，无论有无腐蚀，都没有观察到半导电性和钝化区。H2S 暴露期间的氢进入降低了裸合金基板的钝化性。