Application of Cathodic Protection Current Density to Evaluation of the Effectiveness of Cathodic Protection

Pipeline cathodic protection parameters include the natural corrosion potential,cathodic protection potential and the protection current density.There parameters decide the effectiveness of cathodic protection.According to the related criterion,different current density values are corresponding to different coating levels.An analysis is made of the current density anomaly to determine the effectiveness of coating.The results show that cathodic protection current density in the evaluation of coating performance and effectiveness of cathodic protection is of great guiding significance.However,cathodic protection current density and evaluation of coating need to be improved for a further refinement.