Abstract Liquid metal dealloying is a newly available technology used to create bulk porous materials. In this study, a commercial nickel-based superalloy, Incoloy 800, was dealloyed to elaborate a fully porous ferritic stainless steel. The Mg selective dissolution in nitric acid solution acts as a passivation treatment that enhances the passive film resistance. Corrosion tests confirm the beneficial effect of the nitric acid treatment on the Cr enrichment of the passive film thus improved the material resistance. The electrochemical characterizations show a higher effect of the size porosities on the diffusion kinetics of the electrolyte rather than on the pitting sensitivity.

中文翻译：

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Incoloy 800液态金属脱合金生产多孔铁素体不锈钢的耐腐蚀性能

摘要 液态金属脱合金是一种新的可用于制造大块多孔材料的技术。在这项研究中，对商业镍基高温合金 Incoloy 800 进行了脱合金处理，以制造出一种全多孔铁素体不锈钢。Mg 在硝酸溶液中的选择性溶解起到了钝化处理的作用，增强了钝化膜的电阻。腐蚀试验证实了硝酸处理对钝化膜的 Cr 富集的有益影响，从而提高了材料的抵抗力。电化学表征表明，尺寸孔隙率对电解质扩散动力学的影响比对点蚀敏感性的影响更大。