الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Corrosion is one of the most common problems in industry, which causes a lot of production losses. This problem mainly appears in heat exchangers, cooling water system and oil transfer. Cathodic protection system depends on several factors, the most important factors are driving potential, anode and cathode geometry, spacing between anode and cathode and the conductivity of the aqueous environment which is favorable toward good distribution of current.This work used cathodic protection (sacrificial anode )to protect from corrosion.A metal which is anode is sacrified to protect the meant metal to be protected (cathode). An apparatus was designed and built to create the galvanic cell using zinc rings as anode and copper rod as cathode and the electrolyte is saline water. Different parameters were studied flow rate, temperature,NaCl concentration , Zn rings spacing and Zn rings width. The results showed that the rate of corrosion increases with increasing flow rate, when the temperature of the corrosion media increases the rate of corrosion of the sacrificial anode will increase. Increasing the salinity of the artificial saline water will increase the rate of corrosion. Rate of corrosion will increase while increasing the spacing between the anodes, if increased further the rate of corrosion will start to decrease. As the width for the anode increases the rate of corrosion decreases.