Study on AC Stray Current Corrosion Law of Buried Steel Pipelines

Wang, Xin Hua; Yang, Guo Yong; Huang, Hai; Chen, Zhenhua; Wang, Li Mei

doi:10.4028/www.scientific.net/amm.263-266.448

Cited by 4 publications

(3 citation statements)

References 3 publications

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“…Stray currents, originating from mass transit systems and overhead electricity pylons and substations, can result in severe corrosion of underground assets (Flounders and Danilyak, 1995;Wang et al, 2013). Zhu et al (2011) have suggested that soils with a higher resistivity can counteract the issue of stray currents by limiting the soils' current carrying capacity.…”

Section: Engineering Sustainabilitymentioning

confidence: 98%

Soil impacts on UK infrastructure: current and future climate

Pritchard¹,

Hallett²,

Farewell³

2014

Proceedings of the Institution of Civil Engineers - Engineering

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2 3This paper undertakes a critical review of the literature concerning mechanisms and impacts of soil-related geohazards to UK infrastructure. The country is predicted to have drier, hotter summers and wetter, warmer winters that in turn will increase the magnitude and frequency of many soil-related geohazards -predominantly due to changes in soil moisture. Probabilistic assessment will be required given the inherent uncertainty in assessing chronic soil hazards. The aim of this paper is to recommend a national framework methodology to aid the management of future risks posed by soil geohazards to UK infrastructure. The framework will help to prioritise ground investigations in high-risk areas, help to design suitable mitigation measures and encapsulate expert knowledge to interpret risk.

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Section: Engineering Sustainabilitymentioning

confidence: 98%

Soil impacts on UK infrastructure: current and future climate

Pritchard¹,

Hallett²,

Farewell³

2014

Proceedings of the Institution of Civil Engineers - Engineering

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“…Focusing on the analysis of the corrosion mechanism of stray current on buried steel pipes, domestic and foreign researchers have done a lot of investigations and studies on the influence of factors such as AC-DC stray current density, pipeline defect area, and external environment on the corrosion of buried steel pipes. In addition, in the study on the corrosion mechanism of AC stray current, Scholars have proposed five typical hypothesis models through theoretical analysis, experimental verification, field detection and other methods [6][7]. However, due to the fact that AC corrosion process is prone to interference by various factors and the process is relatively complex, the cause and process of AC corrosion are different and cannot be unified [8][9].…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of stray current corrosion of buried steel pipeline under cathodic protection

Li,

Yang

et al. 2024

International Conference on Optoelectronic Information and Functional Materials (OIFM 2024)

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Stray current corrosion has become one of the important reasons for corrosion failure of buried steel pipelines. In this paper, based on Comsol Multiphysics software, the influence of stray current on the corrosion of buried steel pipes under cathodic protection was simulated and analyzed, and the influence of leakage voltage, soil conductivity, pipeline buried depth and other factors on the cathodic protection potential was analyzed. The simulation results show that under the action of -1V cathodic protection, when the leakage voltage exceeds 10V, the interference degree of stray current is very strong, and the cathodic protection is likely to fail. Under cathodic protection, soil average current density was positively correlated with soil conductivity under a certain leakage voltage. With the increase of burial depth, the positive shift of pipeground potential decreases and gradually returns to the cathodic protection potential level. Therefore, the buried range greater than 1.5m is determined within the allowable range of field technology and economy, and the combination of cathodic protection can better prevent stray current corrosion interference. The research in this paper has important guiding significance for further understanding of stray current corrosion mechanism of buried steel pipelines.

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“…In summary, AC voltage can interfere in the normal operation of cathodic protection system [9,[16][17][18][19][20][21], or cause polarity reversal in pipelines with the sacrificial anode, leading to the pipeline lack of effective protection. Therefore, it is very necessary to study the influence of AC stray current on the cathodic protection system.…”

Section: Introductionmentioning

confidence: 99%

Study on the Electrochemical Performance of Sacrificial Anode Interfered by Alternating Current Voltage

Chu

Shen

2018

International Journal of Corrosion

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The effect of alternating current (AC) voltage of 0V, 1V, 3V, and 5V on magnesium alloy sacrificial anode electrochemical properties was studied by open circuit potential (OCP) analysis, electrochemical impedance spectroscopy (EIS), and polarization curve measurements. The results demonstrate that the AC voltage has a great effect on the magnesium alloy sacrificial anode. The corrosion control is anode control in the first two days with no AC interference. The stray current accelerates the transmission and diffusion of oxygen, so the corrosion rate under AC interference is higher than that with no AC interference. And the corrosion control becomes cathodic control under AC interference. The corrosion rate of the sacrificial anode is faster and faster as the AC interference voltage increases in the range of 0~5V, while the corrosion inclination is weakened.

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Study on AC Stray Current Corrosion Law of Buried Steel Pipelines

Cited by 4 publications

References 3 publications

Soil impacts on UK infrastructure: current and future climate

Soil impacts on UK infrastructure: current and future climate

Numerical simulation of stray current corrosion of buried steel pipeline under cathodic protection

Study on the Electrochemical Performance of Sacrificial Anode Interfered by Alternating Current Voltage

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