https://scholars.lib.ntu.edu.tw/handle/123456789/635582
標題: | Understanding the passive behaviour of low-chromium high-strength Hybrid steel in corrosive environments | 作者: | Örnek, Cem Payam, Beste Gloskovskii, Andrei Kazmanlı, Kürşat Mohamed, Nourhan Derin, Bora Ürgen, Mustafa Chou, Chin En HUNG-WEI YEN Avcı, Burçak Ooi, Steve |
公開日期: | 1-十二月-2023 | 卷: | 7 | 期: | 1 | 來源出版物: | npj Materials Degradation | 摘要: | We investigated the unique passive behaviour of Hybrid steel in de-aerated sulfuric acid and aqueous sodium chloride solutions through corrosion tests, surface analysis, and thermochemical modelling. Electrochemical measurements confirmed that Hybrid steel possesses stainless steel characteristics, including passivity, breakdown, and pitting, akin to low-alloyed stainless steel. Synchrotron hard X-ray photoelectron spectroscopy revealed a dynamically protective nanoscale passive film composed of Fe, Cr, Ni, and Al oxides, contributing to its stainless nature. The presence of Al and Ni enhances Cr’s role in forming a spontaneously passive and protective surface, resulting in exceptional corrosion resistance in acidic and chloride-containing solutions. Hybrid steel’s surface oxides remain robust even beyond the Cr(III)-to-Cr(VI) redox potential, distinguishing it from other stainless steels. This work demonstrates the potential for designing sustainable stainless steel with high-strength properties without requiring the conventional Cr threshold concentration of 10.5 per cent. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/635582 | ISSN: | 2397-2106 | DOI: | 10.1038/s41529-023-00392-z |
顯示於: | 材料科學與工程學系 |
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