Effects of Cr and Ta additions on microstructure, corrosion-wear and electrochemical performances of laser cladded Fe90-Al2O3 coating in 3.5% NaCl solution. Issue 4 (31st May 2022)

• Record Type: Journal Article
• Authors: Yan, Hu; Dejun, Kong
• Is Part Of: Anti-corrosion methods and materials. Volume 69:Issue 4(2022)
• Page Start: 442
• Page End: 451
• Publication Date: 2022-05-31
• Subjects: Laser cladding (LC) -- Fe90-Al2O3 coating -- Cr element -- Ta element -- Coefficient of friction (COF) -- Corrosion-wear model; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1108/ACMM-01-2022-2589
• Languages: English
• ISSNs: 0003-5599

Abstract

Abstract : Purpose: This paper aims to investigate the effects of Cr and Ta additions on the friction performance and corrosion-wear mechanism of Fe90-Al2 O3 coating in 3.5% NaCl solution. Design/methodology/approach: Cr and Ta reinforced Fe90-Al2 O3 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-Al2 O3 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-Al2 O3, Fe90-Al2 O3 -10%Cr and Fe90-Al2 O3 -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 mm 3 s −1 N −1, respectively. The corrosion-wear resistance of Fe90-Al2 O3 -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-Al2 O3 coating was strengthened by the additions of Cr and Ta to improve its corrosion-wear resistance in 3.5% NaCl solution.