Exploring the influence of alloying elements (Zr, Si, and V) on the corrosion behavior of FeCoNiCr-based high entropy alloys in supercritical water environment

This is the authors' abstract. We don't add key points for this paper.

This study investigated the effect of alloying elements Zr, V, and Si on the corrosion behavior of FeCoNiCr-based high entropy alloys in supercritical water. Adding Zr decreased corrosion resistance owing to the formation of a thinner Cr 2 O 3 outer layer and a mixed Cr 2 O 3 and ZrO 2 inner layer. Adding Si formed a complex oxide film with a triple-layer structure with pores and cracks, accelerating corrosion. By contrast, adding V improved corrosion resistance because the formation of a compacted V 0.87 Cr 0.13 O 2.7 layer inhibited the diffusion of anions and cations. The corrosion mechanisms were also discussed.