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Effects of alloying elements (Mo and W) on corrosion behavior of Ni-based alloys in NaCl-KCl-MgCl 2 molten salt

Corrosion Science, ISSN: 0010-938X, Vol: 237, Page: 112313
2024
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Article Description

The effects of elements (Mo and W) on the corrosion behavior of some Ni-based alloys (GH3535 and GH3539) with a low Cr content (6–7 wt%) in a NaCl-KCl-MgCl 2 molten salt under Ar gas at 800°C were investigated by an immersion test combining with the microstructure analyses. GH3539 alloy suffered more severe corrosion attack than GH3535. The precipitates caused by the alloying elements affects the outward diffusion of Cr. W is more sensitive to corrosion than Mo in the chloride salt, resulting in the worse corrosion resistance of GH3539 compared to GH3535. The interactions among the elements also affect the corrosion.

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