Development of electroless Ni-Zn-P/nano-TiO2 composite coatings and their properties |
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Authors: | S Ranganatha K Vathsala |
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Institution: | Department of Studies in Chemistry, School of Chemical Sciences, Kuvempu University, Shankaraghatta, Shimoga 577451, Karnataka, India |
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Abstract: | Ni-Zn-P-TiO2 composite coatings were successfully obtained on low carbon steel by electroless plating technique. Deposits were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy-dispersive analysis (EDS) studies. The hardness and microstructure of as plated and heat treated Ni-Zn-P and Ni-Zn-P-TiO2 composite coatings were analyzed. The change in microstructure and higher hardness was noticed for heat treated composite. The corrosion resistance behavior of as plated and heat treated Ni-Zn-P and Ni-Zn-P-TiO2 coatings was investigated by anodic polarization, Tafel plots and electrochemical impedance spectroscopic (EIS) studies in 3.5 wt% NaCl solution. The composite coating exhibited enhanced corrosion resistance property over Ni-Zn-P coating. |
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Keywords: | Electroless Ni-Zn-P-TiO2 Composites Metal matrix Coatings Corrosion Microstructure |
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