Evaluation of the Hydrogen Barrier Properties of Chromium Oxide Films Deposited on SUS304 Austenitic Stainless Steels
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Le résumé fourni par la source
Abstract Austenitic stainless steels including type SUS304 of the Japanese Industrial Standard (JIS), which is similar to ASME Type 304 SS, are candidate materials for the various facilities of high-pressure gaseous hydrogen, such as a hydrogen station containers and piping. To prevent the hydrogen penetration into SUS304, we developed the passivation films mainly composed of chromium oxide and investigated the hydrogen barrier properties using the gas permeability test and the slow strain rate tensile (SSRT) test. The passivation films with a maximum thickness of 300 nm was formed on the surface of hot-rolled SUS304 (Ni equivalent 22.4) by a series of wet processing steps such as electro-polishing, chemical oxidation, cathode precipitation of chromium and passivation immersion. Cross-sectional views of TEM observation suggested that the film was amorphous like structure including many independent voids with a size of 10 to 20 nm. The hydrogen gas permeability test was performed in a hydrogen gas pressure of 400 kPa at 573 K, 673 K, and 773 K. The estimated hydrogen transmittance of SUS304 substrate with passivation coating was 2.8 × 10−13 mol / (m · s · Pa) at 773 K, while that without passivation coating was 2.2 × 10−11 mol / (m · s · Pa) at 773 K. SSRT test was performed in 110 MPa hydrogen and nitrogen gas atmosphere at room temperature, and strain rate was 4.17 × 10−5 s−1. The fracture surface of the specimen without passivation coating showed brittle like and relative reduction rate (RRA) was 0.61. On the other hand, the fracture surface of the specimen with passivation coating showed typical ductile like dimple structure and RRA was 0.88. As the passivation films did not peel, adhesion between passivation film and SUS304 surface seems to be well. From these considerations, we anticipate the developed passivation film can inhibit hydrogen embrittlement of SUS304.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Evaluation of the Hydrogen Barrier Properties of Chromium Oxide Films Deposited on SUS304 Austenitic Stainless Steels
- Date Crossref
- 17/07/2022
- Éditeur
- American Society of Mechanical Engineers
- Type
- proceedings-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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National Institute of Advanced Industrial Science and Technology pays non établi dans la noticeOrganisme public
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Tottori Institute of Industrial Technology pays non établi dans la noticeStructure de recherche
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Hiroshima University pays non établi dans la noticeUniversité ou école supérieure
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Higashihiroshima Medical Center pays non établi dans la noticeÉtablissement de santé
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Asahimekki Co. Ltd. pays non établi dans la noticeEntreprise
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ESep Co. Ltd. pays non établi dans la noticeEntreprise
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Yokohama Research and Engineering Office pays non établi dans la noticeInstitution
National Institute of Advanced Industrial Science and Technology, Tottori Institute of Industrial Technology et Hiroshima University, avec 4 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.