Investigation of Corrosion and Morphological Behavior of Zn-SiC Nanocomposite Thin Films Produced by Pulse Current

Zn-SiC nanocomposite coatings were prepared from a sulfate bath solution by pulse electrochemical deposition. In this method, frequency and duty cycle parameters were investigated. Morphological and corrosion properties of these coatings were investigated by FE-SEM and potentiodynamic polarization in 1M NaCl solution. In case of frequency it was observed that by increasing its value from 10 to 100 Hz, the amount of codeposited nanoparticles firstly decreases and then increases in the coatings. By increasing duty cycle from 10 to 75%, the amount of codeposited nanoparticles firstly increases until 50% duty cycle and then decreases in the coatings. Also by increasing the maximum current density, a maximum amount of incorporated nanoparticles is observed. These changes are function of Ton and Toff in pulse current.