Corrosion and oxidation behaviors of CoAlTiWTa RHEA coating on Inconel 718 superalloy prepared by laser cladding

被引：4

作者：

Liu, Xiaolian ^{[1
]}

Zhong, Limin ^{[1
]}

Chen, Yanxia ^{[1
]}

Chai, Linjiang ^{[2
]}

Guo, Shengfeng ^{[1
]}

Guo, Ning ^{[1
]}

机构：

[1] Southwest Univ, Sch Mat & Energy, Chongqing 400715, Peoples R China

[2] Chongqing Univ Technol, Coll Mat Sci & Engn, Chongqing 400054, Peoples R China

来源：

CORROSION SCIENCE | 2024年 / 236卷

关键词：

CoAlTiWTa; Refractory high-entropy alloy; Pulsed laser cladding; Corrosion resistance; High-temperature oxidation; HIGH-ENTROPY ALLOYS; MECHANICAL-PROPERTIES; RESISTANCE; MICROSTRUCTURE; PROPERTY; KINETICS;

D O I：

10.1016/j.corsci.2024.112273

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

CoAlTiWTa refractory high-entropy alloy (RHEA) coating was prepared on Inconel 718 superalloy by pulsed laser cladding. Corrosion behavior in 3.5 wt% NaCl solution at room temperature and oxidation behavior at 600 degree celsius of the coating were systematically investigated. The electrochemical performance, surface morphology, and corrosion and oxidation products were carefully characterized. The results show that the RHEA coating has a higher corrosion potential, smaller corrosion current, higher resistance value, and a more obvious passivation effect. Duplex-layer oxide film composed of an internal Al2O3-TiO2 layer and an external Co oxide layer is formed on the RHEA coating, improving high-temperature oxidation resistance.

引用

页数：13

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