Effects of Cr and Ta additions on microstructure, corrosion-wear and electrochemical performances of laser cladded Fe90-Al₂O₃ coating in 3.5% NaCl solution

Abstract

Purpose

This paper aims to investigate the effects of Cr and Ta additions on the friction performance and corrosion-wear mechanism of Fe90-Al₂O₃ coating in 3.5% NaCl solution.

Design/methodology/approach

Cr and Ta reinforced Fe90-Al₂O₃ coatings were prepared on Q235 steel by laser cladding. The effects of Cr and Ta addition on the coefficient of friction (COF) and wear rate of Fe90-Al₂O₃ coating were investigated using a friction tester, and the wear model was established to discuss its corrosion-wear mechanism.

Findings

The average COFs of Fe90-Al₂O₃, Fe90-Al₂O₃-10%Cr and Fe90-Al₂O₃-10%Ta coatings in 3.5% NaCl solution are 0.57, 0.42 and 0.75, respectively, and the corresponding wear rates are 9.42 × 10⁻⁷, 5.31 × 10⁻⁷ and 7.02 × 10⁻⁷ mm³ s⁻¹ N⁻¹, respectively. The corrosion-wear resistance of Fe90-Al₂O₃-10%Cr coating is the best among the three kinds of coatings, in which the additions of Cr and Ta play a role in solid solution strengthening.

Originality/value

The Fe90-Al₂O₃ coating was strengthened by the additions of Cr and Ta to improve its corrosion-wear resistance in 3.5% NaCl solution.

Citation

Yan, H. and Dejun, K. (2022), "Effects of Cr and Ta additions on microstructure, corrosion-wear and electrochemical performances of laser cladded Fe90-Al₂O₃ coating in 3.5% NaCl solution", Anti-Corrosion Methods and Materials, Vol. 69 No. 4, pp. 442-451. https://doi.org/10.1108/ACMM-01-2022-2589