Simultaneous proton irradiation and dissolution corrosion of SS316L in liquid Pb-4Bi alloy

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

Corrosion Science Pub Date : 2025-05-04 DOI:10.1016/j.corsci.2025.113010

Wande Cairang , Weiyue Zhou , Mark Lapington , Yong Zhang , Minyi Zhang , Paola Massielle Amadeo , Kevin B. Woller , Felix Hofmann , Xing Gong , Michael P. Short

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引用次数: 0

Abstract

Dissolution of steels in contact with heavy liquid metals is a well-known deleterious corrosion mode, but existing literature lacks comprehensive data and thorough mechanistic understanding on how radiation influences dissolution corrosion. This is a critical issue to be addressed for both fission and fusion applications. In this study, simultaneous radiation and corrosion experiments were conducted on stainless steel (SS) 316 L in liquid lead - 4 wt% bismuth (Pb-4Bi) at 675℃, utilizing 3 MeV proton irradiation. The results reveal that proton irradiation promotes both the initiation of dissolution corrosion on the surface of the SS316L, and subsequent penetration into the bulk of the material. The former is attributed to radiation-enhanced wetting of the liquid metal on the SS316L surface, while the latter results from radiation-enhanced diffusion of more susceptible elements (Fe and Cr) and less susceptible element (Ni) from the bulk to the liquid metal/fresh substrate interface. At the interface, the miscible elements predominantly dissolve in the liquid metal, while the immiscible elements diffuse along the interface into the ferritized (BCC) regions. This research provides insights into the synergetic mechanism of dissolution and irradiation in SS316L exposed to liquid lead-bismuth alloy, and could be generalizable to similar, austenitic, solid solution steels, which undergoes selective elemental dissolution in liquid metals.

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SS316L在液态Pb-4Bi合金中的同步质子辐照和溶解腐蚀

钢与重金属接触的溶解是一种众所周知的有害腐蚀方式，但现有文献缺乏辐射影响溶解腐蚀的全面数据和深入的机理认识。这是裂变和聚变应用都要解决的一个关键问题。在675℃下，利用3 MeV质子辐照，对不锈钢（SS） 316 L在铅-4 wt%铋（Pb-4Bi）液体中进行了同步辐射和腐蚀实验。结果表明，质子辐照既促进了SS316L表面的溶解腐蚀，又促进了材料内部的渗透。前者是由于辐射增强了液态金属在SS316L表面的润湿，而后者是由于辐射增强了易感元素（Fe和Cr）和不易感元素（Ni）从体向液态金属/新鲜衬底界面的扩散。在界面处，混相元素主要溶解在液态金属中，而非混相元素沿界面向铁化区扩散。本研究为SS316L暴露于液态铅铋合金中溶解和辐照的协同机制提供了见解，并可推广到类似的奥氏体固溶体钢，这些钢在液态金属中经历选择性元素溶解。

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.