Surfactants Effect on Zn–Si3N4 Coating, Electrochemical Properties, and Their Corrosion Behaviors
2013
Mohankumar, Praveenkumar C. | Venkatesha, Venkatarangaiah T.
The effect of sodium dodecyl sulfate (SDS) and cetyl trimethyl ammonium bromide (CTAB) on electrodeposited Zn-Si₃N₄ composite coating, on a mild steel substrate, was examined. The cathodic polarization and cyclic voltammetric techniques were adopted to understand the role of surfactants. The structure and morphology of the coatings were studied by X-ray diffraction, scanning electron microscopy, and energy dispersive X-ray analysis. The influence of Si₃N₄ and surfactants on the preferred orientation of Zn was examined on X-ray diffraction data. The nucleation mechanism of Zn and the Zn+Si₃N₄ composite in the presence of SDS and CTAB was examined. The corrosion resistance properties of Zn and Zn–Si₃N₄ coatings were measured.
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