Study of Effect and Protection for Corrosion on Buried Pipeline by AC Interference

Abstract:

Small-scale experiments were conducted to evaluate the corrosion on buried pipeline by AC interference. The results showed that stray current, pH and conductivity are significantly influenced the pipeline corrosion rate according to the response surface methodology (RSM) . The corrosion rate of buried pipeline greatly increased with the increase of stray current. The corrosion rate of most specimens first decreased and then increased slightly with the rise of pH. The corrosion rate of most specimens first decreased and then increased with the rise of conductivity in acid soils, but contrary in neutral and alkaline soils. Most of the specimen surface was covered with different sizes of reddish-brown bumps corrosion products in the acidic solution and reddish-brown, black corrosion products in the alkaline solution, but the specimen surface was smooth in the neutral solution. Because of economic and environmental factors, the AC interference is not always achievable. Therefore, comprehensive approaches should be taken for AC interference protection.

• Periodical: Advanced Materials Research (Volumes 557-559)
• Pages: 1756-1763
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.557-559.1756
• Online since: July 2012
• Authors: Li Jing Zhang, Yi Wei Pan, Gang Tao, Yi Min Wang, Yuan Li
• Keywords: AC Interference, Buried Pipeline, Corrosion, Protection Measures

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