{"title":"Understanding the Corrosion Behavior of P92 Steel in CO2 Using In-Situ Monitoring Technology II: Mechanism of Oxide Scale Peeling","authors":"Tingshan Guo, Zhiyuan Liang, Qinxin Zhao","doi":"10.1007/s11085-024-10268-5","DOIUrl":null,"url":null,"abstract":"<div><p>The mechanism of oxide scale exfoliation from P92 steel during formation in CO<sub>2</sub> under over-temperature conditions at 650 ℃ was studied by the experiments, thermodynamics, and molecular dynamics. A duplex oxide scale with an inner FeCr<sub>2</sub>O<sub>4</sub> scale and an outer Fe<sub>3</sub>O<sub>4</sub> scale was formed on P92 steel, in which honeycomb pores were observed in Fe<sub>3</sub>O<sub>4</sub> oxides. The honeycomb pore size and CO gas generation rate on P92 steel showed maximum values after 80 min. The exfoliation of Fe<sub>3</sub>O<sub>4</sub> oxide scale was divided into two stages based on the deposition of carbon in the honeycomb pores.</p></div>","PeriodicalId":724,"journal":{"name":"Oxidation of Metals","volume":"101 1 supplement","pages":"169 - 183"},"PeriodicalIF":2.1000,"publicationDate":"2024-07-21","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/s11085-024-10268-5","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}
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Abstract
The mechanism of oxide scale exfoliation from P92 steel during formation in CO2 under over-temperature conditions at 650 ℃ was studied by the experiments, thermodynamics, and molecular dynamics. A duplex oxide scale with an inner FeCr2O4 scale and an outer Fe3O4 scale was formed on P92 steel, in which honeycomb pores were observed in Fe3O4 oxides. The honeycomb pore size and CO gas generation rate on P92 steel showed maximum values after 80 min. The exfoliation of Fe3O4 oxide scale was divided into two stages based on the deposition of carbon in the honeycomb pores.
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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