Hot corrosion behaviour of nickel-cobalt-based alloys in a lithium molten salt
2019; Elsevier BV; Volume: 151; Linguagem: Inglês
10.1016/j.corsci.2019.01.041
ISSN1879-0496
AutoresSoohaeng Cho, Suk-Cheol Kwon, Dae Young Kim, Woo-Seok Choi, Yong-Soo Kim, Jong‐Hyeon Lee,
Tópico(s)Aluminum Alloy Microstructure Properties
ResumoIn this study, hot corrosion behaviours of Haynes 282 (H282), Nimonic 90 (N90), and Haynes HR160 (HR160) in LiCl-Li2O molten salt were investigated at 650 °C under argon atmosphere. The corrosion rate was in the order of H282 < N90 < HR160, depending on the morphology and structure of the scale. H282 showed a localised corrosion behaviour, while N90 showed a uniform corrosion behaviour. For HR-160, intergranular corrosion was observed. The high Cr content caused intergranular corrosion in the corrosion layer. Thus, excess Cr has a deleterious effect on the corrosion kinetics during hot corrosion in LiCl-Li2O molten salt.
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