Improving pitting resistance of Mo-containing stainless steels via chloride-assisted stabilization of the passive film
Improving pitting resistance of Mo-containing stainless steels via chloride-assisted stabilization of the passive film
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DOI：
10.1016/j.corsci.2023.111787
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发表时间：
2023-12
影响因子：
8.3
通讯作者：
Y.T. Xu;B. Zhang;X.X. Wei;B. Wu;Y.J. Wang;X.L. Ma
中科院分区：
文献类型：
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作者：
Y.T. Xu;B. Zhang;X.X. Wei;B. Wu;Y.J. Wang;X.L. Ma
众所周知，钼是一种有益的合金元素，使不锈钢具有增强的抗氯化物侵蚀的能力。一般认为，钼修饰钝化膜，使其更耐氯化物侵蚀。通过像差校正的透射电镜，我们发现是氯离子刺激钼在钝化膜中积累，同时使膜增厚，从而增强了钝化膜的耐蚀性。通过在氯化物介质中钝化老化，大大提高了耐点蚀性。我们的研究结果显示了在防腐干预措施中有用的实际应用的广阔前景。
Molybdenum is well known as a beneficial alloying element which entitles stainless steels an enhanced resistance against chloride attack. It is generally accepted that Mo modifies passive film to be more resistant to chloride attack. Here, by means of aberration-corrected transmission electron microscopy, we show that it is the chloride ions that stimulate Molybdenum accumulating in passive films and meanwhile induce film thickening, which are responsible for the enhancement of corrosion resistance. By passivation aging in chloride media, we obtain a great enhancement of the pitting resistance. Our results show the broad prospects for useful practical applications in anti-corrosion interventions.