Effect of Y₂O₃ mass fraction on electrochemical corrosion performances of laser cladded CrNi coatings in 3.5% NaCl solution

Abstract

Purpose

The purpose of this study is to investigate the effect of Y₂O₃ mass fraction on the electrochemical corrosion performance of CrNi coating, which provided a foundation for the performance optimization of CrNi coatings.

Design/methodology/approach

CrNi coatings with the different Y₂O₃ mass fractions were fabricated on AISI H13 steel by laser cladding, and the effect of Y₂O₃ mass fraction on the electrochemical performance of CrNi coating in 3.5% NaCl solution was investigated using an electrochemical workstation.

Findings

The electrochemical corrosion performance of CrNi coating enhances with the increase of Y₂O₃ mass fraction, and the CrNi–15%Y₂O₃ coating has the largest polarization resistance and the lowest corrosion current density, which displays the best electrochemical performance among the CrNi–5%Y₂O₃, –10%Y₂O₃ and –15%Y₂O₃ coatings. The protective films are formed with the increase of Y₂O₃ mass fraction, which inhibits the occurrence of electrochemical corrosion.

Originality/value

The Y₂O₃ was first added to the CrNi coating to improve its electrochemical corrosion performance, and the influence of Y₂O₃ on the corrosion resistance of the CrNi coating was discussed by the corrosion model.

Citation

Wei, L. and Dejun, K. (2022), "Effect of Y₂O₃ mass fraction on electrochemical corrosion performances of laser cladded CrNi coatings in 3.5% NaCl solution", Anti-Corrosion Methods and Materials, Vol. 69 No. 2, pp. 171-176. https://doi.org/10.1108/ACMM-11-2021-2568