Corrosion Resistance of CoCrFeNiMn High Entropy Alloy Coating Prepared through Plasma Transfer Arc Claddings

High entropy alloy attracts great attention for its high thermal stability and corrosion resistance. A CoCrFeNiMn high-entropy alloy coating was deposited on grey cast iron through plasma transfer arc cladding. It formed fine acicular martensite near the grey cast iron, with columnar grains perpendi...

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Autores principales:	Pei-Hu Gao, Rui-Tao Fu, Bai-Yang Chen, Sheng-Cong Zeng, Bo Zhang, Zhong Yang, Yong-Chun Guo, Min-Xian Liang, Jian-Ping Li, Yong-Qing Lu, Lu Jia, Dan Zhao
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	high-entropy alloy coating plasma cladding microstructure corrosion Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/3e06b5a718d24cfc93e7e4f55e21cfd4
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spelling	oai:doaj.org-article:3e06b5a718d24cfc93e7e4f55e21cfd42021-11-25T18:22:35ZCorrosion Resistance of CoCrFeNiMn High Entropy Alloy Coating Prepared through Plasma Transfer Arc Claddings10.3390/met111118762075-4701https://doaj.org/article/3e06b5a718d24cfc93e7e4f55e21cfd42021-11-01T00:00:00Zhttps://www.mdpi.com/2075-4701/11/11/1876https://doaj.org/toc/2075-4701High entropy alloy attracts great attention for its high thermal stability and corrosion resistance. A CoCrFeNiMn high-entropy alloy coating was deposited on grey cast iron through plasma transfer arc cladding. It formed fine acicular martensite near the grey cast iron, with columnar grains perpendicular to the interface between the grey cast iron substrate and the cladding layer as well as dendrite in the middle part of the coatings. Simple FCC solid solutions present in the coatings which were similar to the powder’s structure. The coating had a microhardness of 300 ± 21.5 HV<sub>0.2</sub> when the cladding current was 80 A for the solid solution strengthening. The HEA coating had the highest corrosion potential of −0.253 V when the plasma current was 60 A, which was much higher than the grey cast iron’s corrosion potential of −0.708 V. Meanwhile, the coating had a much lower corrosion current density of 9.075 × 10<sup>−7</sup> mA/cm<sup>2</sup> than the grey cast iron’s 2.4825 × 10<sup>−6</sup> mA/cm<sup>2</sup>, which reflected that the CoCrFeNiMn HEA coating had much better corrosion resistance and lower corrosion rate than the grey cast iron for single FCC solid solution phase and a relatively higher concentration of Cr in the grain boundaries than in the grains and this could lead to corrosion protection effects.Pei-Hu GaoRui-Tao FuBai-Yang ChenSheng-Cong ZengBo ZhangZhong YangYong-Chun GuoMin-Xian LiangJian-Ping LiYong-Qing LuLu JiaDan ZhaoMDPI AGarticlehigh-entropy alloy coatingplasma claddingmicrostructurecorrosionMining engineering. MetallurgyTN1-997ENMetals, Vol 11, Iss 1876, p 1876 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	high-entropy alloy coating plasma cladding microstructure corrosion Mining engineering. Metallurgy TN1-997
spellingShingle	high-entropy alloy coating plasma cladding microstructure corrosion Mining engineering. Metallurgy TN1-997 Pei-Hu Gao Rui-Tao Fu Bai-Yang Chen Sheng-Cong Zeng Bo Zhang Zhong Yang Yong-Chun Guo Min-Xian Liang Jian-Ping Li Yong-Qing Lu Lu Jia Dan Zhao Corrosion Resistance of CoCrFeNiMn High Entropy Alloy Coating Prepared through Plasma Transfer Arc Claddings
description	High entropy alloy attracts great attention for its high thermal stability and corrosion resistance. A CoCrFeNiMn high-entropy alloy coating was deposited on grey cast iron through plasma transfer arc cladding. It formed fine acicular martensite near the grey cast iron, with columnar grains perpendicular to the interface between the grey cast iron substrate and the cladding layer as well as dendrite in the middle part of the coatings. Simple FCC solid solutions present in the coatings which were similar to the powder’s structure. The coating had a microhardness of 300 ± 21.5 HV<sub>0.2</sub> when the cladding current was 80 A for the solid solution strengthening. The HEA coating had the highest corrosion potential of −0.253 V when the plasma current was 60 A, which was much higher than the grey cast iron’s corrosion potential of −0.708 V. Meanwhile, the coating had a much lower corrosion current density of 9.075 × 10<sup>−7</sup> mA/cm<sup>2</sup> than the grey cast iron’s 2.4825 × 10<sup>−6</sup> mA/cm<sup>2</sup>, which reflected that the CoCrFeNiMn HEA coating had much better corrosion resistance and lower corrosion rate than the grey cast iron for single FCC solid solution phase and a relatively higher concentration of Cr in the grain boundaries than in the grains and this could lead to corrosion protection effects.
format	article
author	Pei-Hu Gao Rui-Tao Fu Bai-Yang Chen Sheng-Cong Zeng Bo Zhang Zhong Yang Yong-Chun Guo Min-Xian Liang Jian-Ping Li Yong-Qing Lu Lu Jia Dan Zhao
author_facet	Pei-Hu Gao Rui-Tao Fu Bai-Yang Chen Sheng-Cong Zeng Bo Zhang Zhong Yang Yong-Chun Guo Min-Xian Liang Jian-Ping Li Yong-Qing Lu Lu Jia Dan Zhao
author_sort	Pei-Hu Gao
title	Corrosion Resistance of CoCrFeNiMn High Entropy Alloy Coating Prepared through Plasma Transfer Arc Claddings
title_short	Corrosion Resistance of CoCrFeNiMn High Entropy Alloy Coating Prepared through Plasma Transfer Arc Claddings
title_full	Corrosion Resistance of CoCrFeNiMn High Entropy Alloy Coating Prepared through Plasma Transfer Arc Claddings
title_fullStr	Corrosion Resistance of CoCrFeNiMn High Entropy Alloy Coating Prepared through Plasma Transfer Arc Claddings
title_full_unstemmed	Corrosion Resistance of CoCrFeNiMn High Entropy Alloy Coating Prepared through Plasma Transfer Arc Claddings
title_sort	corrosion resistance of cocrfenimn high entropy alloy coating prepared through plasma transfer arc claddings
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/3e06b5a718d24cfc93e7e4f55e21cfd4
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Corrosion Resistance of CoCrFeNiMn High Entropy Alloy Coating Prepared through Plasma Transfer Arc Claddings

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