Role of solute clustering and grain orientation on electrochemical degradation of Sn-Bi coatings electrodeposited at different current densities

Singh, AP and Srivastava, C (2024) Role of solute clustering and grain orientation on electrochemical degradation of Sn-Bi coatings electrodeposited at different current densities. In: Electrochimica Acta, 477 .

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Abstract

The electrochemical Corrosion behaviour of Sn�14wt Bi coatings, electrodeposited at four different cathodic current densities (5, 12, 25, and 40 mA/cm2), were studied in aqueous 3.5 wt NaCl (0.6M) electrolyte and was correlated with the coating's micro-texture and solute Bi distribution in the β�Sn matrix. Lower energy (301) grain orientation, Sn�1.2at Bi solid solution, and SnO2 oxide passive layer yielded highest corrosion resistance (Rp = 17518 Ω·cm2) for coating electrodeposited at 25mA/cm2. Higher energy (110) grain orientation, Bi-enriched nanoclusters in β�Sn matrix, and unstable passive layer consisting of SnO and Sn(OH)2 oxides produced lowest corrosion resistance (Rp = 3911 Ω·cm2) for coating electrodeposited at 40 mA/cm2. © 2024 Elsevier Ltd

Item Type:	Journal Article
Publication:	Electrochimica Acta
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to Elsevier Ltd.
Keywords:	Binary alloys; Bismuth compounds; Corrosion resistance; Corrosion resistant coatings; Corrosive effects; Electrochemical corrosion; Electrodes; Electrolytes; Sodium chloride, Atom-probe tomography; Clusterings; Electrochemical corrosion behavior; Electrochemical degradation; Grain orientation; matrix; Passive layer; Sn-bi coating; Solute clustering; β-Sn, Textures
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	01 Mar 2024 06:37
Last Modified:	01 Mar 2024 06:37
URI:	https://eprints.iisc.ac.in/id/eprint/83910

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