{"title":"铁在液态六氟化铀中80°C的腐蚀。第二部分：腐蚀机理","authors":"Mickaël Achour , Laure Martinelli , Sylvie Chatain , Fréderic Miserque , Laurent Jouffret , Marc Dubois , Pierre Bonnet , Ania Selmi , Bertrand Morel , Sylvie Delpech","doi":"10.1016/j.jfluchem.2024.110373","DOIUrl":null,"url":null,"abstract":"<div><div>Thanks to species identification and growth interface localization experiments, a mechanism of iron corrosion in liquid UF<sub>6</sub> at 80 °C was suggested. After an UF<sub>6</sub> dissociation step, resulting fluorine (HF, F<sup>-</sup> or F•) was adsorbed at the FeF<sub>2</sub> external interface and diffused into the iron fluoride layer via fluorine vacancy. FeF<sub>2</sub> grew thus at the FeF<sub>2</sub>/Fe interface. Two FeF<sub>2</sub> growth kinetics were observed depending on the presence or absence of NO<sub>x</sub>F impurities. Both corrosion rates were controlled by the cathodic reaction and presence of NO<sub>x</sub>F catalysed it.</div></div>","PeriodicalId":357,"journal":{"name":"Journal of Fluorine Chemistry","volume":"281 ","pages":"Article 110373"},"PeriodicalIF":1.9000,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Corrosion of iron in liquid uranium hexafluoride at 80 °C. Part II: Corrosion mechanism\",\"authors\":\"Mickaël Achour , Laure Martinelli , Sylvie Chatain , Fréderic Miserque , Laurent Jouffret , Marc Dubois , Pierre Bonnet , Ania Selmi , Bertrand Morel , Sylvie Delpech\",\"doi\":\"10.1016/j.jfluchem.2024.110373\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Thanks to species identification and growth interface localization experiments, a mechanism of iron corrosion in liquid UF<sub>6</sub> at 80 °C was suggested. After an UF<sub>6</sub> dissociation step, resulting fluorine (HF, F<sup>-</sup> or F•) was adsorbed at the FeF<sub>2</sub> external interface and diffused into the iron fluoride layer via fluorine vacancy. FeF<sub>2</sub> grew thus at the FeF<sub>2</sub>/Fe interface. Two FeF<sub>2</sub> growth kinetics were observed depending on the presence or absence of NO<sub>x</sub>F impurities. Both corrosion rates were controlled by the cathodic reaction and presence of NO<sub>x</sub>F catalysed it.</div></div>\",\"PeriodicalId\":357,\"journal\":{\"name\":\"Journal of Fluorine Chemistry\",\"volume\":\"281 \",\"pages\":\"Article 110373\"},\"PeriodicalIF\":1.9000,\"publicationDate\":\"2025-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Fluorine Chemistry\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0022113924001337\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, INORGANIC & NUCLEAR\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Fluorine Chemistry","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022113924001337","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
Corrosion of iron in liquid uranium hexafluoride at 80 °C. Part II: Corrosion mechanism
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 NOxF impurities. Both corrosion rates were controlled by the cathodic reaction and presence of NOxF catalysed it.
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.
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