Investigation the effect of ICCP and SACP on carbon steelcorrosion in salt solution at different parameters

Abstract

Cathodic protection has wide applications in various structures and is an effective electrochemical technique for mitigating or preventing corrosion of metal structures. To apply this technique, open circuit voltage (ocp) was measured under all conditions. The experiments consisted of samples of carbon steel immersed in solutions of NaCl concentrations (0.5, 1.5, 3) g/L at (20 and 30) ° C, different pH values (4-7-10) and different potentials (-). Application of 700, -900, -1000, -1200 mv in forced current cathodic protection (ICCP). The anodic cathodic protection (SACP) (AL alloy) was also implemented with the same parameters. The density of the protective current increases with increasing temperature and concentration due to the increase in the mobility of ions in the solution, as the conductivity of the solution increases and with the decrease in the pH. The experimental results showed that increasing the DC current leads to an increase in the cathodic protection current. Therefore, the ICCP method is more effective than the SACP method, the higher the DC power supply.