Applied Chemical Engineering

PRODUCTION OF Zn-Ti ALLOY ELECTRODEPOSITION FOR BIOMEDICAL APPLICATIONS

Ramesh S. Bhat

Department of Chemistry, NMAM Institute of Technology, NITTE (Deemed to be University)

Keywords: Zn-Ti coating, corrosion, electrodeposition, roughness, SEM.

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Abstract

Acidic sulphate bath having ZnSO₄, TiSO₄ and sulphamic acid, was optimized for the deposition of bright Zn-Ti coating on mild steel. Bath constituents and operating parameters were optimized by trial-and-error method, for highest performance of the deposit against corrosion. The effect of current density, on deposit characters, such as corrosion rate, thickness, and hardness were discussed. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) methods were used to evaluate the corrosion properties of the deposit. The composition of deposits was determined by energy dispersive x-ray (EDX) analysis. Surface topography of the deposited film was analyzed by scanning electron microscopy (SEM). Surface roughness was measured by atomic force microscopy (AFM). A new and low-priced sulphate bath, for bright Zn-Ti coatings on mild steel has been proposed, and the results indicate better corrosion resistance properties, and these coatings can be used for biomedical applications.

 

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