Development and optimization of Zn–Ni–TiO2 composite coating, assessment of its corrosion resistance and antimicrobial activity

Shet, Vinayaka B and Bhat, Ramesh S and Selvaraj, Raja and Guruprasad, . and kodgi, Amogh and Damodaran, Anurag and Savithri, Akshara (2021) Development and optimization of Zn–Ni–TiO2 composite coating, assessment of its corrosion resistance and antimicrobial activity. Applied Nanoscience, 11. pp. 2469-2477. ISSN 2190-5509

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Abstract

Zn–Ni–TiO2 composite coating was developed through response surface methodology. The current density and concentration of TiO2 were optimized to obtain a minimum corrosion rate. The optimized condition obtained from the central composite design achieved a minimum experimental corrosion rate of 0.122 mm/year as a response for the Zn–Ni–TiO2 composite coating with a current density of 2.91 A/dm2 and concentration of TiO2 4.9 g/L. The potentiodynamic polarization and electrochemical impedance spectroscopic method was used to measure the corrosion resistance. The antimicrobial activity of the composite coating was assessed. Growth of Gram-negative and -positive microbes was observed on the polished mild steel. However, the composite coating exhibited resistance to Gram-negative microorganisms. Surface characterization was carried out using scanning electron microscopy (SEM) along with energy-dispersive X-ray spectroscopy depicting the pres�ence of Zn, Ni, Ti, and O elements in the composite coating. Atomic force microscopy confrmed the surface roughness and heterogeneous distribution of crystal grain

Item Type: Article
Uncontrolled Keywords: Antimicrobial activity · Corrosion rate · Composite coating · Optimization · Zn–Ni–TiO2
Subjects: Engineering > MIT Manipal > Chemical
Depositing User: MIT Library
Date Deposited: 07 Jan 2022 05:09
Last Modified: 07 Jan 2022 05:09
URI: http://eprints.manipal.edu/id/eprint/157967

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