Thermally sprayed multi-principal element Cr40Co40Ni20 coatings - Oxidation upon coatings' build-up and electrochemical corrosion

被引：10

作者：

Koga, G. Y. ^{[1
,2
,7
]}

Nascimento, A. R. C. ^{[3
]}

Ettouil, F. B. ^{[3
]}

Rodrigues, L. C. M. ^{[1
,4
]}

Zepon, G. ^{[1
]}

Bolfarini, C. ^{[1
]}

Kiminami, C. S. ^{[1
]}

Botta, W. J. ^{[1
]}

Schulz, R. ^{[5
]}

Silva, A. Costa e ^{[6
]}

Moreau, C. ^{[3
]}

Coury, F. G. ^{[1
]}

机构：

[1] Univ Fed Sao Carlos, Dept Mat Sci & Engn, Rod Washington Luis, BR-13565905 Sao Carlos, SP, Brazil

[2] Univ Fed Sao Carlos, Ctr Characterizat & Dev Mat CCDM, Rod Washington Luis, BR-13565905 Sao Carlos, SP, Brazil

[3] Concordia Univ, Dept Mech Ind & Aerosp Engn, 1455 Maisonneuve Blvd W, Montreal, PQ H3G 1M8, Canada

[4] Univ Fed Sao Carlos, Grad Program Mat Sci & Engn, Rod Washington Luis, BR-13565905 Sao Carlos, SP, Brazil

[5] Hydroquebec Res Inst, 1800 Boul Lionel Boulet, Varennes, PQ J3X 1S1, Canada

[6] EEIMVR UFF, Volta Redonda, RJ, Brazil

[7] Univ Fed Sao Carlos, Dept Mat Sci & Engn, Rod Washington Luis, BR-13565905 Sao Carlos, SP, Brazil

来源：

SURFACE & COATINGS TECHNOLOGY | 2023年 / 454卷

基金：

巴西圣保罗研究基金会;

关键词：

High entropy alloys; Compositionally complex alloys; HVAF; HVOF; Oxidation; Eletrochemical corrosion; HIGH-ENTROPY ALLOY; IMPEDANCE SPECTROSCOPY; MEASUREMENT MODELS; BEHAVIOR;

D O I：

10.1016/j.surfcoat.2022.129154

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Thermally sprayed Cr40Co40Ni20 coatings were produced by high-velocity oxygen fuel (HVOF) and high-velocity air fuel (HVAF). The phases formed upon coatings' build-up were sensitive to oxidation at high temperatures, leading to the formation of various oxygen-rich compounds such as chromia and spinel. Chromia tended to be formed at the inner layer, in contact with the metal, and the spinel forming the outer layer. HVAF coatings suffered much less oxidation compared to the HVOF coatings. The pronounced Cr-depletion at the metallic and oxygen compounds caused by formation of spinel and oxide upon deposition of coatings created regions sus-ceptible to readily corrode in chloride-rich electrolyte.

引用

页数：16

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