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Published in: Journal of Materials Engineering and Performance 2/2022

23-09-2021

Enhancement in Anti-Corrosive Behavior of Ni-P Coatings by Incorporation of Carbon Nanotubes

Authors: Atul P. Meshram, M. K. Punith Kumar, Chandan Srivastava

Published in: Journal of Materials Engineering and Performance | Issue 2/2022

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Abstract

Ni-P-carbon nanotube (CNT) coatings were electrodeposited over mild steel using electrolyte bath containing different CNT concentrations (2.5, 5, 10, 15 mgl−1). Ni-P-CNT coatings exhibited improved corrosion resistance when compared to the pristine Ni-P coating. The corrosion behavior of the samples at different exposure times (1, 24, 48, 72 h) was analyzed using potentiodynamic polarization and electrochemical impedance spectroscopy techniques. After 1h immersion in the corrosive media, highest charge transfer resistance with lowest corrosion current density value was observed for the coating obtained from electrolyte with 5 mgl−1 CNT concentration when compared to other coatings. This coating showed the highest corrosion resistance primarily due to lesser morphological defects. The non-uniform distribution of agglomerated CNTs in Ni-P-CNT coatings from electrolytes with lower (0 and 2.5 mgl−1) and higher CNT concentration (10, 15 mg l−1) caused surface defects and degraded corrosion resistance. For higher exposure times, the coating produced from the electrolyte containing 10 mgl−1 CNT concentration exhibited the highest corrosion resistance property. It was shown that an optimization of CNT dispersion in the electroplating bath is required to achieve highest anti-corrosive property and this optimum requirement varies with the change in the exposure time of the coating to the corrosive media.

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Literature
19.
Metadata
Title
Enhancement in Anti-Corrosive Behavior of Ni-P Coatings by Incorporation of Carbon Nanotubes
Authors
Atul P. Meshram
M. K. Punith Kumar
Chandan Srivastava
Publication date
23-09-2021
Publisher
Springer US
Published in
Journal of Materials Engineering and Performance / Issue 2/2022
Print ISSN: 1059-9495
Electronic ISSN: 1544-1024
DOI
https://doi.org/10.1007/s11665-021-06260-8

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