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Effect of laser remelting on microstructure, salt spray corrosion and electrochemical performance of plasma sprayed CoCrFeNiMo HEA coating

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Abstract

A plasma sprayed CoCrFeNiMo high-entropy alloy coating on Ti6Al4V alloy was processed by laser remelting, and the salt spray corrosion and electrochemical performances of obtained coatings were evaluated using a salt spray tester and electrochemical workstation. The results show that the corrosion mechanisms of plasma sprayed and laser remelted coatings are pitting corrosion + crevice corrosion and pitting corrosion + uniform corrosion, respectively, and the charge transfer resistance of laser remelted coating is higher than that of plasma sprayed coating. Moreover, the corrosion resistance of plasma sprayed coating is increased by laser remelting, which is contributed to the formation of passive films.

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Authors and Affiliations

  1. School of Mechanical Engineering, Changzhou University, Changzhou, 213164, People’s Republic of China

    Liu Zhicheng & Kong Dejun

  2. Jiangsu Yuanfang Power Technology Co. Ltd, Changzhou, 212021, People’s Republic of China

    He Chuang

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  1. Liu Zhicheng
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  2. He Chuang
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  3. Kong Dejun
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LZ contributed to methodology and writing—original draft preparation. KD contributed to supervision, reviewing and editing.

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Correspondence to Kong Dejun.

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Zhicheng, L., Chuang, H. & Dejun, K. Effect of laser remelting on microstructure, salt spray corrosion and electrochemical performance of plasma sprayed CoCrFeNiMo HEA coating. J Mater Sci 58, 10484–10500 (2023). https://doi.org/10.1007/s10853-023-08638-6

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