Title: The effect of powder-pack aluminising on the corrosion performance of FeCoGx low entropy alloys

Authors: Mehmet Küçükilhan; Ersan Mertgenç; Fatih Çolak

Addresses: Department of Nanoscience and Nanotechnology, Institute of Science, Afyon Kocatepe University, Afyonkarahisar, Turkey ' Department of Railway Systems, Afyon Vocational High School, Afyon Kocatepe University, Afyonkarahisar, Turkey ' Department of Mechanical and Metal Technologies, Vocational School of Technical Sciences, Usak University, Uşak, Turkey

Abstract: Non-reinforced, 3% and 5% nano graphene reinforced FeCo alloy was produced by powder metallurgy and TIG melting methods, and the coating was made using the pack aluminising method. Scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD) and microhardness measurements were used in characterisation processes. Co₇Fe₃Al₁₀, Co₂Al₅, FeCoAl, FeAl, Fe₂Al₅, and Al₂O₃ phases were detected on the coated sample surfaces. The coating layer thicknesses were obtained between 86 μm and 132 μm with the aluminium. With the coating, it was determined that the surface hardness of the samples increased by more than two times. Better corrosion resistance results were obtained in production with TIG melting compared to powder metallurgy of FeCo alloy. The best corrosion resistance in the FeCoGx alloy, which is coated with pack aluminising, has been determined in production with TIG melting, which has the highest graphene reinforcement (5%) and the highest coating layer thickness.

Keywords: FeCo alloy; graphene; low entropy alloy; pack aluminising; corrosion.

DOI: 10.1504/IJSURFSE.2024.141505

International Journal of Surface Science and Engineering, 2024 Vol.18 No.3, pp.229 - 244

Received: 21 Sep 2023
Accepted: 09 Dec 2023
Published online: 18 Sep 2024 *

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