Electrochemical corrosion and high temperature hot corrosion behavior of NbTaTiV and CrNbTaTiV high entropy alloy

Yu Gao; Kai Chong; Chang Liu; Yingwen Cao; Dongting Wu; Yong Zou

Journal of Materials Research and Technology (Jan 2024)

Electrochemical corrosion and high temperature hot corrosion behavior of NbTaTiV and CrNbTaTiV high entropy alloy

Yu Gao,
Kai Chong,
Chang Liu,
Yingwen Cao,
Dongting Wu,
Yong Zou

Affiliations

Yu Gao: Shenzhen Research Institute of Shandong University, Shenzhen, 518063, China; Key Laboratory of Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan, Shandong, 250061, China
Kai Chong: Key Laboratory of Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan, Shandong, 250061, China
Chang Liu: Shanghai Key Laboratory of Advanced High-temperature Materials and Precision Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
Yingwen Cao: School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo, 315211, China
Dongting Wu: Key Laboratory of Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan, Shandong, 250061, China; Corresponding author.
Yong Zou: Shandong Engineering & Technology Research Center for Modern Welding, Shandong University, Jinan, Shandong, 250061, China; Corresponding author.

Journal volume & issue: Vol. 28
pp. 216 – 234

Abstract

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NbTaTiV and CrNbTaTiV were fabricated by arc melting and effect of Cr element on electrochemical and high temperature hot corrosion behavior were compared. Electrochemical corrosion investigations revealed that Laves phase at grain boundaries of CrNbTaTiV would underwent galvanic corrosion, resulting in a marginal reduction in corrosion resistance. The results of high temperature hot corrosion showed that within Na2SO4 + 25 wt% NaCl molten salt environment, the oxide film formed by Cr element effectively improved the surface stability, reduced the formation of unprotected loose corrosion products and the generation of low melting point chlorides with strong volatility, which improved the resistance of molten salt corrosion.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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