ZG06Cr13Ni4Mo martensitic stainless steel was nitric acid‐passivated to improve its corrosion performance. The effects of nitric acid passivation on the surface morphology, chemical composition, electrochemical properties, semiconductor behavior, and long‐term corrosion performance of the stainless steel were investigated using various analytical techniques. An in‐depth analysis of X‐ray photoelectron spectroscopy (XPS) showed that the passive film formed after the acid passivation process showed high thickness and a duplex character as it consisted of a hydroxide layer and an oxide layer. The oxide layer affected the corrosion resistance and thickness of the passive film. The thickness of the passive film was calculated theoretically as well as experimentally by fitting the electrochemical impedance spectroscopy and XPS results. The electrochemical tests revealed that the dramatic increase in the corrosion resistance of the stainless steel after the passivation was due to the formation of a thick, low‐disorder passive film rather than Cr enrichment. The removal of inclusions resulted in higher pitting resistance, whereas the increased roughness showed a negative effect on the corrosion behavior of the stainless steel. During the wet–dry cyclic tests, the modification of the passive film was examined. The passivated stainless steel exhibited good corrosion resistance for up to 50 days of exposure in the simulated environment.

中文翻译：

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硝酸钝化对模拟海洋大气中ZG06Cr13Ni4Mo不锈钢腐蚀行为的影响

ZG06Cr13Ni4Mo马氏体不锈钢经过硝酸钝化以提高其腐蚀性能。使用各种分析技术研究了硝酸钝化对不锈钢的表面形态，化学成分，电化学性能，半导体行为和长期腐蚀性能的影响。对X射线光电子能谱（XPS）的深入分析表明，酸钝化工艺后形成的钝化膜具有较高的厚度和双重特性，因为它由氢氧化物层和氧化物层组成。氧化层影响钝化膜的耐腐蚀性和厚度。通过拟合电化学阻抗谱和XPS结果，从理论上和实验上计算了无源膜的厚度。电化学测试表明，钝化后不锈钢的耐蚀性显着提高是由于形成了厚的，低序的钝化膜而不是铬富集。夹杂物的去除导致更高的抗点蚀性，而增加的粗糙度则对不锈钢的腐蚀行为产生不利影响。在干湿循环测试中，检查了钝化膜的改性。钝化的不锈钢在模拟环境中暴露长达50天显示出良好的耐腐蚀性。夹杂物的去除导致更高的抗点蚀性，而增加的粗糙度则对不锈钢的腐蚀行为产生不利影响。在干湿循环测试中，检查了钝化膜的改性。钝化的不锈钢在模拟环境中暴露长达50天显示出良好的耐腐蚀性。夹杂物的去除导致更高的抗点蚀性，而增加的粗糙度则对不锈钢的腐蚀行为产生不利影响。在干湿循环测试中，检查了钝化膜的改性。钝化的不锈钢在模拟环境中暴露长达50天显示出良好的耐腐蚀性。