Effect of heat treatment on the microstructure, LBE corrosion resistance, and bonding strength of the FeCrAl-based coatings

IF 1.6 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials and Corrosion-werkstoffe Und Korrosion Pub Date : 2024-07-21 DOI:10.1002/maco.202414331

Wei Zhang, Mingyang Zhou, Huifang Yue, Danmin Peng, Xi Qiu, Jijun Yang

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Abstract

The bonding strength and LBE corrosion resistance of the Fe15Cr11Al2Si, Fe15Cr11Al0.5Y, and Fe15Cr11Al2Si0.5Y coatings heat-treated at 500–650°C for 500 h were investigated. The results showed that the as-deposited Fe15Cr11Al0.5Y coating has the strongest bonding strength with the F/M steel cladding tube compared with the Fe15Cr11Al2Si and Fe15Cr11Al2Si0.5Y coatings. Heat treatment deteriorates the bonding performance of the coatings, and obvious enrichment of Cr and Al elements appeared. The consumed Al element inside the heat-treated coatings promotes the formation of Fe₃O₄ on the surface of the coatings after the corrosion test. The Y element can inhibit the enrichment of elements and the formation of Fe₃O₄. The bonding strength of the heat-treated coatings can be improved after the corrosion test. The underlying mechanism of the evolution of microstructure and properties of the coatings after heat treatment and corrosion test was discussed.

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热处理对铁铬铝基涂层的微观结构、抗 LBE 腐蚀性和结合强度的影响

研究了在 500-650°C 下热处理 500 h 的 Fe15Cr11Al2Si、Fe15Cr11Al0.5Y 和 Fe15Cr11Al2Si0.5Y 涂层的结合强度和抗 LBE 腐蚀性能。结果表明，与 Fe15Cr11Al2Si 和 Fe15Cr11Al2Si0.5Y 涂层相比，原敷设的 Fe15Cr11Al0.5Y 涂层与 F/M 包覆钢管的结合强度最强。热处理会恶化涂层的结合性能，出现明显的铬和铝元素富集。热处理涂层内部消耗的铝元素促进了腐蚀试验后涂层表面 Fe3O4 的形成。Y 元素可以抑制元素的富集和 Fe3O4 的形成。腐蚀试验后，热处理涂层的结合强度可以得到改善。讨论了热处理和腐蚀试验后涂层微观结构和性能演变的内在机理。

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来源期刊

Materials and Corrosion-werkstoffe Und Korrosion 工程技术-材料科学：综合

CiteScore

3.70

自引率

11.10%

发文量

199

审稿时长

1.4 months

期刊介绍： Materials and Corrosion is the leading European journal in its field, providing rapid and comprehensive coverage of the subject and specifically highlighting the increasing importance of corrosion research and prevention. Several sections exclusive to Materials and Corrosion bring you closer to the current events in the field of corrosion research and add to the impact this journal can make on your work.

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