Corrosion of iron in liquid uranium hexafluoride at 80 °C. Part II: Corrosion mechanism

IF 1.7 4区化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR

Journal of Fluorine Chemistry Pub Date : 2025-01-01 DOI:10.1016/j.jfluchem.2024.110373

Mickaël Achour , Laure Martinelli , Sylvie Chatain , Fréderic Miserque , Laurent Jouffret , Marc Dubois , Pierre Bonnet , Ania Selmi , Bertrand Morel , Sylvie Delpech

引用次数: 0

Abstract

Thanks to species identification and growth interface localization experiments, a mechanism of iron corrosion in liquid UF₆ at 80 °C was suggested. After an UF₆ dissociation step, resulting fluorine (HF, F^- or F•) was adsorbed at the FeF₂ external interface and diffused into the iron fluoride layer via fluorine vacancy. FeF₂ grew thus at the FeF₂/Fe interface. Two FeF₂ growth kinetics were observed depending on the presence or absence of NO_xF impurities. Both corrosion rates were controlled by the cathodic reaction and presence of NO_xF catalysed it.

Abstract Image

查看原文本刊更多论文

铁在液态六氟化铀中80°C的腐蚀。第二部分：腐蚀机理

通过物种鉴定和生长界面定位实验，提出了铁在80℃液态UF6中的腐蚀机理。经过一个UF6解离步骤后，生成的氟（HF、F-或F•）被吸附在FeF2外界面上，并通过氟空位扩散到氟化铁层中。FeF2在FeF2/Fe界面生长。观察到两种FeF2生长动力学取决于noxx杂质的存在或不存在。两种腐蚀速率均受阴极反应和nox催化反应的控制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of Fluorine Chemistry 化学-无机化学与核化学

CiteScore

3.80

自引率

10.50%

发文量

审稿时长

33 days

期刊介绍： The Journal of Fluorine Chemistry contains reviews, original papers and short communications. The journal covers all aspects of pure and applied research on the chemistry as well as on the applications of fluorine, and of compounds or materials where fluorine exercises significant effects. This can include all chemistry research areas (inorganic, organic, organometallic, macromolecular and physical chemistry) but also includes papers on biological/biochemical related aspects of Fluorine chemistry as well as medicinal, agrochemical and pharmacological research. The Journal of Fluorine Chemistry also publishes environmental and industrial papers dealing with aspects of Fluorine chemistry on energy and material sciences. Preparative and physico-chemical investigations as well as theoretical, structural and mechanistic aspects are covered. The Journal, however, does not accept work of purely routine nature. For reviews and special issues on particular topics of fluorine chemistry or from selected symposia, please contact the Regional Editors for further details.