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Development of electroless Ni–Zn–P/nano-TiO2 composite coatings and their properties

✍ Scribed by S. Ranganatha; T.V. Venkatesha; K. Vathsala

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
589 KB
Volume
256
Category
Article
ISSN
0169-4332

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✦ Synopsis

Ni-Zn-P-TiO 2 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-TiO 2 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-TiO 2 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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