Abstract
To simulate the interaction between different coating holidays on buried pipeline under alternating current (AC) interference, laboratory experiments were carried out using a specially designed circuit connecting two specimens of different sizes. The application of AC between two different specimens could induce DC current from the smaller specimen to the bigger one in the solution, which would increase the corrosion rate of the smaller specimen. The research showed that size difference between holidays on buried pipeline is an important factor in accelerating AC corrosion.
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