Title: Wear and corrosion properties of the Cr-Ta coating deposited by electrospark deposition on the CrNi3MoVA steel

Authors: Feng Gao; Jinpeng Yang; Guanglin Zhu; Minghuang Bi; Zijun Wang; Xiaoming Chen; Ce'an Guo; Jian Zhang

Addresses: School of Equipment Engineering, Shenyang Ligong University, Shenyang, China ' School of Equipment Engineering, Shenyang Ligong University, Shenyang, China ' School of Equipment Engineering, Shenyang Ligong University, Shenyang, China ' School of Equipment Engineering, Shenyang Ligong University, Shenyang, China ' School of Equipment Engineering, Shenyang Ligong University, Shenyang, China ' School of Equipment Engineering, Shenyang Ligong University, Shenyang, China ' School of Equipment Engineering, Shenyang Ligong University, Shenyang, China ' School of Equipment Engineering, Shenyang Ligong University, Shenyang, China

Abstract: A Cr-Ta coating with a thickness of approximately 30 μm was deposited on a CrNi3MoVA steel substrate using electrospark deposition, and its wear and corrosion properties were investigated. The dense Cr-Ta coating with fine grains is composed of Cr₂Ta and Fe-Cr solid solution and metallurgically bonded to the substrate. Compared to the CrNi3MoVA steel, the Cr-Ta coating exhibits higher hardness, lower friction coefficient and wear loss. The main wear mechanism of the CrNi3MoVA steel is adhesive wear while that of the Cr-Ta coating belongs to abrasive wear. Furthermore, in contrast to the CrNi3MoVA steel, the Cr-Ta coating has a corrosion current density reduced by one order of magnitude, a corrosion potential shifted by approximately 0.05 V in the positive direction, and an electrochemical impedance increased by six times. These results indicated that the Cr-Ta coating significantly enhances the wear and corrosion properties of the CrNi3MoVA steel.

Keywords: electrospark deposition; wear; corrosion; Cr-Ta coating.

DOI: 10.1504/IJSURFSE.2025.148147

International Journal of Surface Science and Engineering, 2025 Vol.19 No.3, pp.201 - 216

Received: 18 Sep 2024
Accepted: 27 Dec 2024
Published online: 27 Aug 2025 *

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