Nanocrystalline Composite Smart Coating Deposition for Corrosion Self-Healing of Mild Steel

Abstract:

This work examine the potential of ZrB₂ in the presence of Ni-P-Zn sulphate rich bath coating on mild steel under change in time from 10-25 min. The coating pH of 5, current density of 1 A/cm², and stirring rate of 250 rpm was considered in the fabrication process. The microstructure evolution and properties of the deposited coating was analysed using a scanning electron microscope enhanced with energy dispersive spectroscopy (SEM/EDS). All deposited composite coating was investigated in 0.5 M H₂SO₄ and 3.5% NaCl with the help of linear polarization and open circuit potential. From the result, a solid crystal formation containing zirconium boride was seen from the SEM study. At 25 min a remarkable dispersed and even thin film was noticeable at the interface. From all indication, coating produced with Ni-P-Zn-10ZrB₂ at 25 min provides a passive response against corrosion damage. Keywords: Electrodeposition, interface, nanocrystalline, structure, coating

• Periodical: International Journal of Engineering Research in Africa (Volume 55)
• Pages: 132-140
• DOI: https://doi.org/10.4028/www.scientific.net/JERA.55.132
• Online since: August 2021
• Authors: Ojo S. I. Fayomi, Sunday Olayinka Oyedepo, Desmond E. Ighravwe, Daniel O. Aikhuele
• Keywords: Coating, Electrodeposition, Interface, Nanocrystalline, Structure

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