AC corrosion. Part 2: Parameters influencing corrosion rate

Abstract Pipelines and AC power transmission lines frequently share corridors leading to AC interference corrosion problems, as documented by pipeline failures that have occurred in the USA, Canada and Europe, even when cathodic protection is applied. In order to investigate these phenomena, weight loss tests on carbon steel samples were performed in soil-simulating conditions (aerated and de-aerated sulphate solutions) at various AC current densities from 10 to about 900 A/m 2 . Tests on freely corroding samples showed that the corrosion rate increased as AC current density increased; the effect of AC on corrosion rate was also detected at current densities lower than 30 A/m 2 . The results obtained are analyzed and discussed together with polarization test results, which were presented in a previous paper by Goidanich et al. (submitted for publication) [1] .

[1]  S. Lalvani,et al.  A revised model for predicting corrosion of materials induced by alternating voltages , 1996 .

[2]  D. Schiffrin,et al.  Mechanism of enhancement of the corrosion of steel by alternating currents and electrocatalytic properties of cycled steel surfaces , 1990 .

[3]  D. Chin,et al.  Corrosion by Alternating Current: A Study of the Anodic Polarization of Mild Steel in Na2SO4 Solution , 1979 .

[4]  S. Lalvani,et al.  A theoretical approach for predicting AC-induced corrosion , 1994 .

[5]  Burton McCollum,et al.  The influence of frequency of alternating or infrequently reversed current on electrolytic corrosion , 1916, Proceedings of the American Institute of Electrical Engineers.

[6]  T. Tan,et al.  Effect of Alternating Voltage on the Pitting of Aluminum in Nitrate, Sulfate, and Chloride Solutions , 1989 .

[7]  Harry R. Hanson,et al.  AC Corrosion on a Pipeline Located in a HVAC Utility Corridor , 2004 .

[8]  李幼升,et al.  Ph , 1989 .

[9]  L. Lazzari,et al.  AC corrosion - Part 1: Effects on overpotentials of anodic and cathodic processes , 2010 .

[10]  U. Bertocci.  ac induced corrosion. The effect of an alternating voltage on electrodes under charge-transfer control , 1979 .

[11]  D. Chin,et al.  Corrosion by Alternating Current: Polarization of Mild Steel in Neutral Electrolytes , 1983 .

[12]  D. Jones,et al.  Effect of Alternating Current on Corrosion of Low Alloy and Carbon Steels , 1978 .

[13]  Roger Floyd.  Testing and Mitigation of AC Corrosion on 8 Line: A Field Study , 2004 .

[14]  Erwan Collet,et al.  Corrosion due to AC influence of very high voltage power lines on polyethylene‐coated steel pipelines: evaluation of risks – preventive measures , 2001 .

[15]  I. Ragault.  AC Corrosion Induced by V.H.V. Electrical Lines on Polyethylene Coated Steel Gas Pipelines , 1998 .

[16]  S. Venkatachalam,et al.  Influence of frequency of alternating current on the electrochemical dissolution of mild steel and nickel , 1980 .

[17]  S. Pookote,et al.  EFFECT OF ALTERNATING CURRENT ON THE UNDERGROUND CORROSION OF STEELS , 1978 .