Effect on Morphology and Corrosion Behavior of AlCrFeCoNi High-Entropy Alloy Coatings Prepared by Electroless Process on Mild Steel Substrate

Mohan, M and Singh, S and Pandel, U and Kumar, K (2024) Effect on Morphology and Corrosion Behavior of AlCrFeCoNi High-Entropy Alloy Coatings Prepared by Electroless Process on Mild Steel Substrate. [Book Chapter]

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Abstract

The AlCrFeCoNi high entropy alloys (HEAs) coatings were prepared by electroless deposition process on mild steel (MS) substrates. Post annealing treatment at 600 °C for 30 min was carried out on coated HEA samples. The morphology, phase analysis, corrosion behavior, and surface oxide chemistry were observed for substrate, as coated HEA, and post-annealed samples. All the samples exhibited BCC phase formation with increasing BCC phase fraction. The HEA₂ (31.75 ± 2.6 μA/cm2) samples exhibited the lowest corrosion current density value (icorr) as compared to HEA₁ (75.2 ± 2.4 μA/cm2) and MS (135 ± 4.5 μA/cm2) which shows that HEA coatings can improvize the corrosion property of mild steel. Also, post annealing treatment of HEA coatings can enhance the corrosive resistant properties with uniform, globular, and homogeneous surface morphology. The formation of stable oxides Coox3+, Alox3+, and Crox3+ in HEA₂ led to more hydrophobic barrier protecting coatings as well as the substrate from corrosive media. © Electro Chemical Society of India 2024.

Item Type:	Book Chapter
Publication:	Springer Proceedings in Materials
Publisher:	Springer
Additional Information:	The copyright for this article belongs to publisher.
Keywords:	Aluminum coatings; Aluminum corrosion; Corrosion resistance; Corrosion resistant alloys; Corrosion resistant coatings; Corrosive effects; Electroless plating; Hard facing; High-entropy alloys; Low carbon steel; Steel corrosion, Alloy coatings; BCC phase; Corrosion behaviour; Electroless; Electroless deposition process; Electroless process; High entropy alloys; Mild steel substrates; Morphology behavior; Post annealing treatment, Annealing
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	15 Sep 2024 05:59
Last Modified:	17 Sep 2024 10:32
URI:	http://eprints.iisc.ac.in/id/eprint/86082

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