Chao Liu, Tielong Shen, Le Qi, Zhiwei Ma, Hailong Chang, Zhiguang Wang
{"title":"预氧化 T91 钢在 LBE 溶解腐蚀过程中的微观结构演变","authors":"Chao Liu, Tielong Shen, Le Qi, Zhiwei Ma, Hailong Chang, Zhiguang Wang","doi":"10.1007/s11085-024-10309-z","DOIUrl":null,"url":null,"abstract":"<div><p>The microstructural evolution of T91 steel by pre-steam oxidation during liquid lead-bismuth eutectic (LBE) dissolution corrosion was investigated. A bi-layered pre-oxide film with Fe-rich outer layer and Cr-rich inner layer was formed on T91 steel, which was similar to the oxide film of T91 after oxidation corrosion in LBE. The pre-oxide film effectively protects the matrix from LBE corrosion at 620 °C. However, the composition and microstructure of the pre-oxide film changed dramatically. Unlike the original duplex structure, the pre-oxide film exposed to LBE undergoes a process of reduction of the outer layer and oxidative growth of the inner layer and changes into five layers, the loose and easily peeling outer Fe layer, the dense and intact inner layers successively consisting of Fe–Cr spinel layer, a transition layer of matrix and Cr-rich oxide, continuous Cr-rich oxide layer with tetragonal distorted spinel structure and amorphous SiO<sub>2</sub> layer. The evolution mechanism of the pre-oxide film during LBE dissolution corrosion is discussed.</p></div>","PeriodicalId":724,"journal":{"name":"Oxidation of Metals","volume":"101 1 supplement","pages":"267 - 282"},"PeriodicalIF":2.1000,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Microstructural Evolution of Pre-oxidized T91 Steel During LBE Dissolution Corrosion\",\"authors\":\"Chao Liu, Tielong Shen, Le Qi, Zhiwei Ma, Hailong Chang, Zhiguang Wang\",\"doi\":\"10.1007/s11085-024-10309-z\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The microstructural evolution of T91 steel by pre-steam oxidation during liquid lead-bismuth eutectic (LBE) dissolution corrosion was investigated. A bi-layered pre-oxide film with Fe-rich outer layer and Cr-rich inner layer was formed on T91 steel, which was similar to the oxide film of T91 after oxidation corrosion in LBE. The pre-oxide film effectively protects the matrix from LBE corrosion at 620 °C. However, the composition and microstructure of the pre-oxide film changed dramatically. Unlike the original duplex structure, the pre-oxide film exposed to LBE undergoes a process of reduction of the outer layer and oxidative growth of the inner layer and changes into five layers, the loose and easily peeling outer Fe layer, the dense and intact inner layers successively consisting of Fe–Cr spinel layer, a transition layer of matrix and Cr-rich oxide, continuous Cr-rich oxide layer with tetragonal distorted spinel structure and amorphous SiO<sub>2</sub> layer. The evolution mechanism of the pre-oxide film during LBE dissolution corrosion is discussed.</p></div>\",\"PeriodicalId\":724,\"journal\":{\"name\":\"Oxidation of Metals\",\"volume\":\"101 1 supplement\",\"pages\":\"267 - 282\"},\"PeriodicalIF\":2.1000,\"publicationDate\":\"2024-09-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Oxidation of Metals\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s11085-024-10309-z\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"METALLURGY & METALLURGICAL ENGINEERING\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Oxidation of Metals","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s11085-024-10309-z","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}
Microstructural Evolution of Pre-oxidized T91 Steel During LBE Dissolution Corrosion
The microstructural evolution of T91 steel by pre-steam oxidation during liquid lead-bismuth eutectic (LBE) dissolution corrosion was investigated. A bi-layered pre-oxide film with Fe-rich outer layer and Cr-rich inner layer was formed on T91 steel, which was similar to the oxide film of T91 after oxidation corrosion in LBE. The pre-oxide film effectively protects the matrix from LBE corrosion at 620 °C. However, the composition and microstructure of the pre-oxide film changed dramatically. Unlike the original duplex structure, the pre-oxide film exposed to LBE undergoes a process of reduction of the outer layer and oxidative growth of the inner layer and changes into five layers, the loose and easily peeling outer Fe layer, the dense and intact inner layers successively consisting of Fe–Cr spinel layer, a transition layer of matrix and Cr-rich oxide, continuous Cr-rich oxide layer with tetragonal distorted spinel structure and amorphous SiO2 layer. The evolution mechanism of the pre-oxide film during LBE dissolution corrosion is discussed.
期刊介绍：
Oxidation of Metals is the premier source for the rapid dissemination of current research on all aspects of the science of gas-solid reactions at temperatures greater than about 400˚C, with primary focus on the high-temperature corrosion of bulk and coated systems. This authoritative bi-monthly publishes original scientific papers on kinetics, mechanisms, studies of scales from structural and morphological viewpoints, transport properties in scales, phase-boundary reactions, and much more. Articles may discuss both theoretical and experimental work related to gas-solid reactions at the surface or near-surface of a material exposed to elevated temperatures, including reactions with oxygen, nitrogen, sulfur, carbon and halogens. In addition, Oxidation of Metals publishes the results of frontier research concerned with deposit-induced attack. Review papers and short technical notes are encouraged.
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