الفهرس 
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Abstract
The effect of plating conditions, such as current density and the rotation of specimen on the corrosion resistance of pure Zn coats was studied. Metallic additives such as Co.Cr and Mo were added to Zn electrolyte solution in order to improve the corrosion resistance of electrodeposited Zn coats.
The corrosion rates were measured by weight loss technique through atomic absorption spectrophotometer and electrochemical measurements.
The results indicate that minimum corrosion rates were obtained at current density 2OO mA/cm and rotational speed 50O rpm.
The optimum concentrations required to minimize corrosion rates at 2OO mA/cm and 5OO rpm were 8.0 g/1 for Co*2, O. 2 g/1 for Cr* and 0. O2 g/1 for Mo . The order of improvement was Mo > Co > Cr. The electrodeposi ted coat obtained from Zn electrolyte containing all the metallic additives gives a minimum corrosion rate and equals 16.1 and 7.2 mpy for static and rotated specimens, respectively.
The deposit morphology of Zn coats were examined by scanning electron microscope and the results were in agreement with the corrosion rate measurements determined by both weight loss and electrochemical techniques.
A simplified energy study for the process was given and indicated that the total power consumption at 2OO mA/cm and 3.0