Oxidation mechanism of refractory Molybdenum exposed to oxygen-saturated lead-bismuth eutectic at 600 °C

IF 10.3 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2021-02-01 Epub Date: 2020-11-12 DOI:10.1016/j.corsci.2020.109132

Wande Cairang , Shengqiang Ma , Xing Gong , Yi Zeng , Hejie Yang , Dezhen Xue , Yuanbin Qin , Xiangdong Ding , Jun Sun

引用次数: 15

Abstract

The oxidation mechanism of refractory Molybdenum exposed to oxygen-saturated lead-bismuth eutectic (LBE) at 600 °C was investigated. The results show a hierarchical structure of multiple corrosion layers. Specifically, a nanostructured tetragonal MoO₂ is the first scale that forms on the Mo substrate, followed by development of an ultrafine-grained tetragonal lead molybdate (PbMoO₄) layer. On the top of this ultrafine-grained layer, there is a thicker scale that consists of micron-sized columnar PbMoO₄ and its upper part can be further oxidized into blocky monoclinic-structured Pb₂MoO₅. The formation of these multilayered scales is likely predominated by inward diffusion of oxygen and Pb.

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600℃饱和氧铅铋共晶下难熔钼的氧化机理

研究了600℃饱和氧铅铋共晶(LBE)下难熔钼的氧化机理。结果表明，该合金具有多腐蚀层的分层结构。具体来说，纳米结构的四边形钼酸铅是在钼衬底上形成的第一个尺度，随后是超细晶粒的四边形钼酸铅(PbMoO4)层的发展。在超细晶层的顶部，有一层较厚的微米级柱状PbMoO4，其上部可进一步氧化成块状单斜状Pb2MoO5。这些多层鳞片的形成可能主要是由氧和铅向内扩散引起的。

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.