Abstract
The study analyzes alternating current interference by potentiostatic and galvanostatic measurements on coated pipeline steels in simulated soil solutions. The polarization potential and protection current density of pipe samples of various grades is measured. The effect of alternating current on each pipe grade at various polarisation potentials and protection current densities are measured. Different pipe grades' relative performance is measured to determine the pipe grades exhibiting better alternating current corrosion performance under cathodic protection. The experimental study uniquely compares alternating current corrosion performance of different pipeline steel grades, which helps the pipeline operators carefully select the API grades of pipes for long-term trouble-free operation.
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