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Hot corrosion studies of a salt‐coated Ni‐based superalloy under flowing wet air and sulfur vapor ambient
Materials and Corrosion ( IF 1.6 ) Pub Date : 2020-06-02 , DOI: 10.1002/maco.202011667
Hongfei Liu 1 , Shuting Chen 1 , Dennis C. C. Tan 1 , Coryl J. J. Lee 1 , Kui Yao 1
Affiliation  

Corrosion of a salt‐coated Ni‐superalloy has been studied at 900°C under a wet air and sulfur vapor ambient. The corrosion thickness, after an incubation of ~60 hr, linearly increases with the corrosion time t and the onset of surface spallation occurred at t ≈ 60 hr. The corroded layer consists of a corrosion front dominated by Cr3S4 scales and linear precipitate structures, an inner corrosion layer dominated by Ni3S2 and NiO, and an outer corrosion layer dominated by Al2O3 networks surrounding the Ni3S2 and/or NiO scale structures. The corrosion mechanism is discussed based on the coexistence of H2O, sulfur, and oxygen.

中文翻译:

流动的湿空气和硫蒸气环境​​下盐涂层镍基高温合金的热腐蚀研究

已经在湿空气和硫蒸气环境​​下于900°C下研究了盐涂层镍超合金的腐蚀。腐蚀厚度,〜60小时的孵育之后,用腐蚀时间线性增加和表面剥落的发作发生在 ≈60小时。腐蚀层由以Cr 3 S 4鳞片和线性沉淀结构为主的腐蚀前沿,由Ni 3 S 2和NiO为主的内腐蚀层,以及由围绕Ni 3 S的Al 2 O 3网络为主的外腐蚀层组成。2和/或NiO鳞片结构。基于H 2 O,硫和氧的共存来讨论腐蚀机理。
更新日期:2020-06-02
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