Coupling effect of precipitates and hydrogen on pitting corrosion of stainless steel: Low potential region around precipitates

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2024-10-16 DOI:10.1016/j.corsci.2024.112514

Ming Liu , Lining Xu , Lijie Qiao , Yu Yan , Binglu Zhang , Xuehan Wang

引用次数: 0

Abstract

The coupling effect of hydrogen and NbCrN precipitate on pitting initiation and propagation of stainless steel were studied. After hydrogen charging, HMT results showed that more hydrogen was enriched on and around the precipitates. According to In-situ SKPFM and immersion results, the Volta potential of the precipitates is higher than that of the matrix before and after hydrogen charging. However, after hydrogen charging, a low Volta potential region appeared around the precipitates. The enrichment of hydrogen around the precipitates, the low potential around the precipitates, and consequent galvanic coupling effect lead to pits preferentially initiating and developing around the precipitates.

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析出物和氢对不锈钢点腐蚀的耦合效应：析出物周围的低电位区

研究了氢和 NbCrN 沉淀对不锈钢点蚀萌生和扩展的耦合效应。充氢后，HMT 结果表明，析出物上和周围富集了更多的氢。根据原位 SKPFM 和浸泡结果，充氢前后析出物的伏特电位均高于基体。然而，充氢后，沉淀物周围出现了低伏特电位区。析出物周围氢的富集、析出物周围的低电位以及由此产生的电偶效应导致凹坑优先在析出物周围形成和发展。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Corrosion Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

期刊介绍： Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.