Evolution of Texture, Grain Boundary Constitution, Strain, and Corrosion Behavior of Electrodeposited Ni–P Coatings as a Function of Deposition Current Density

Meshram, AP and Gupta, A and Srivastava, C (2022) Evolution of Texture, Grain Boundary Constitution, Strain, and Corrosion Behavior of Electrodeposited Ni–P Coatings as a Function of Deposition Current Density. In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 53 (4). pp. 1430-1439.

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Abstract

Ni–P coatings with low P content (P wt pct < 1.0) were fabricated at different applied current densities of electrodeposition ranging from 5 to 80 mA cm−2. Electrochemical analysis revealed that the Ni–P coating deposited at 60 mA cm−2 exhibited the highest corrosion resistance, while the coating deposited at 5 mA cm−2 exhibited the lowest corrosion resistance. The corrosion analysis results were correlated with the electron backscatter diffraction analysis. Low surface free energy (100) texture, low average grain size, and a high fraction of Σ3 low-energy grain boundaries contributed to the superior corrosion resistance of the 60 mA cm−2 coating. A higher corrosion rate in the case of 5 mA cm−2 coating was primarily due to higher energy surface texture and larger grain size distribution.

Item Type:	Journal Article
Publication:	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Publisher:	Springer
Additional Information:	The copyright for this article belongs to the Springer.
Keywords:	Corrosion rate; Corrosion resistant coatings; Corrosive effects; Electrochemical corrosion; Electrodeposition; Electrodes; Free energy; Grain boundaries; Grain size and shape; Textures, Applied current; Corrosion analysis; Corrosion behaviour; Deposition current density; Electrochemical analysis; Electron backscatter diffraction analysis; Grain-boundaries; Ni-P coating; P contents; Strain behaviors, Corrosion resistance
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	24 Jun 2022 12:07
Last Modified:	24 Jun 2022 12:07
URI:	https://eprints.iisc.ac.in/id/eprint/73716

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