Investigation of Surface Oxide Layer Structure to Improve Durability of Stainless Steels Under Humidified Hydrogen

Autor:	Shunsuke Taniguchi, Yuko Inoue, Chie Uryu, Hung Cuong Pham, Jyh-Tyng Chou, Kazunari Sasaki
Rok vydání:	2023
Předmět:	General Medicine
Zdroj:	ECS Transactions. 111:1623-1628
ISSN:	1938-6737 1938-5862
DOI:	10.1149/11106.1623ecst
Popis:	Durability of low cost stainless steels, selected from the materials widely used in other applications, was investigated under humidified hydrogen of SOFC anode condition. JIS SUS430J1L exhibited higher resistance for water oxidation. The feature came mainly from the thin Cr-rich oxide layer covering the alloy uniformly with little defects or segregations. Under humidified H2 at 700oC, Mn migrated outward and the morphology changed. Durability of the alloy seems to depend on the inner side of the surface oxide layer. Although the Cr-rich oxide layer blocked outward diffusion of metal ions, the layer could not block inward diffusion of oxygen ion completely. Improvement of the durability is possible by controlling the thickness of the surface oxide layer by the pre-heat-treatment.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3defdc5935b6b59367e278bec32bf39a https://doi.org/10.1149/11106.1623ecst Zobrazit plný text záznamu