AC-induced corrosion of underground pipelines

Tribollet, Bernard; Meyer, Michel

doi:10.1533/9780857099266.1.35

Cited by 15 publications

(6 citation statements)

References 24 publications

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“…Requirements need to be set across short distances (the extent of vacuum pipe modules) to limit stress on welding lips (a few mm of di erential motion per 15 m segment is the limit for Virgo), and across long distances to constrain the position of the optical axis. • Atmospheric corrosion is in uenced by average and peak humidity in the caverns and tunnels, the pH of ground and condensation water, and by the presence of chemical elements (in particular chloride if stainless steel will be used for the pipes) [43] • Microbiologically In uenced Corrosion [44] • AC-induced corrosion due to nearby high voltage electric power lines [45].…”

Section: Lifetimementioning

confidence: 99%

Site-selection criteria for the Einstein Telescope

Amann,

Bonsignorio,

Bulik

et al. 2020

Preprint

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e Einstein Telescope (ET) is a proposed next-generation, underground gravitational-wave (GW) detector based in Europe. It will provide about an order of magnitude sensitivity increase with respect to currently operating detectors, and furthermore, extend the observation band towards lower frequencies, i.e., down to about 3 Hz. One of the rst decisions that needs to be made is about the future ET site following an in-depth site characterization. Site evaluation and selection is a complicated process, which takes into account science, nancial, political, and socio-economic criteria. In this paper, we provide an overview of the site-selection criteria for ET, provide a formalism to evaluate the direct impact of environmental noise on ET sensitivity, and outline the necessary elements of a site-characterization campaign.

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Section: Lifetimementioning

confidence: 99%

Site-selection criteria for the Einstein Telescope

Amann,

Bonsignorio,

Bulik

et al. 2020

Preprint

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“…Due to the high population density and the lack of land resources in China, it is inevitable that high-voltage transmission lines or railway systems and oil and gas pipelines crossover or long-distance parallel "public corridors" will be erected [1,2]. Alternating current power generated by high-voltage transmission lines and railway systems is prone to AC corrosion of pipeline steel [3][4][5][6]. The presence of AC may break through the insulation of the pipeline to accelerate the corrosion and destruction of the pipeline, and threaten personal safety [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Study on the Influence of AC Stray Current on X80 Steel under Stripped Coating by Electrochemical Method

Cui

Shen

2019

International Journal of Corrosion

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The effect of AC stray current density on corrosion behavior of X80 steel with stripped coating defects was studied by electrochemical method. The experimental results showed that the open circuit potential of X80 steel was shifted negatively due to the existence of AC interference. The degree of negative shift increased with the increasing of AC stray current density. And the potential after the cut of AC interference was still more negative than before. That is, the corrosion interference continued after cutting the AC power. In the initial stage of the experiment, the corrosion current density with 30A/m2 AC stray current interference was about 1.4 times of that without AC interference, while the corrosion current density with 50A/m2 AC stray current interference was about two times of that without AC interference.

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“…The most concerning locations are where stray currents leave the pipeline because here the potential of the pipe would be shifted in the positive direction in the form of anodic transients. Such anodic transients could in some cases result in insufficient cathodic protection, or even cause the anodic polarisation of the pipeline [15,16]. In the cases where anodic transients lead to corrosion, the attack is usually localised [17,18].…”

Section: Introductionmentioning

confidence: 99%

Understanding the electrochemical processes at the interface of cathodically protected steel pipeline and soil during anodic transients

Zhang

Hinton

Varela

et al. 2018

Corrosion Engineering, Science and Technology

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The steel/soil interface on cathodically protected pipeline steel has been investigated using electrochemical polarisation measurements and electrochemical impedance spectroscopy, to add more insights into the electrochemical processes occurring at the interface. A critical electrode potential (CEP) was found that divides the steel corrosion reaction kinetics into two regions. When the electrode potential is below this critical value, the steel surface has a large impedance value, indicating much slower corrosion kinetics than when the electrode potential is more positive than the CEP value. This critical value is found to be related to pitting potential determined by potentiodynamic polarisation measurements. The CEP could be affected by the CP condition and environmental, including the CP potential and the soil moisture content. At a more negative CP potential, the CEP was found to be nobler; while at the same CP potential but in the soil with a higher moisture content, the CEP became more negative. The impact of the CP potential and soil moisture level on the CEP value is explained by local soil pH effects on steel passivity.

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AC-induced corrosion of underground pipelines

Cited by 15 publications

References 24 publications

Site-selection criteria for the Einstein Telescope

Site-selection criteria for the Einstein Telescope

Study on the Influence of AC Stray Current on X80 Steel under Stripped Coating by Electrochemical Method

Understanding the electrochemical processes at the interface of cathodically protected steel pipeline and soil during anodic transients

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