AC Induced Corrosion of Underground Steel Pipelines under Cathodic Protection: III. Theoretical Approach with Electrolyte Resistance and Double Layer Capacitance for Mixed Corrosion Kinetics

Ibrahim, Ibrahim; Meyer, Michel; Takenouti, H.; Tribollet, Bernard

doi:10.21577/0103-5053.20160330

Cited by 5 publications

(5 citation statements)

References 5 publications

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“…The results of AC corrosion research in the laboratory and field have shown that AC corrosion mainly depends on AC interference and cathodic protection level. [ 30–32 ] Feature subsets ( J AC , J DC ), ( J DC , J AC / J DC ), and ( J AC , E IR‐free ) consider the effects of AC interference and cathodic protection comprehensively. As shown in Figures 3 and 4, the AC corrosion rate model established by feature subsets ( J AC , J DC ), ( J DC , J AC / J DC ), and ( J AC , E IR‐free ) has better prediction performance than others.…”

Section: Discussionmentioning

confidence: 99%

Machine learning approach to AC corrosion assessment under cathodic protection

Long

et al. 2022

Materials & Corrosion

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Data mining was introduced and 178 sets of alternating current (AC) corrosion data were collected from published data and our research group. The AC current density (J AC ), direct current (DC), current density (J DC ), the ratio of AC/DC current density (J AC /J DC ), and cathodic protection potential (IR-free potential, E IR-free ) were defined as the input feature and the priority of feature subset was ranked as (J AC , J DC ) > (J DC , J AC /J DC ) > (J AC , E IR-free ) >J AC > (J AC / J DC , E IR-free ) > J AC /J DC . Then, based on the different feature subsets, the AC corrosion rate model was established by the random forest algorithm, and the generalization ability of the model was verified on the test data respectively.Finally, the mapping relationship between AC, DC parameters, and corrosion rates was presented and the limiting values of (J AC , J DC ) and (J DC , J AC /J DC ) were given.

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Section: Discussionmentioning

confidence: 99%

Machine learning approach to AC corrosion assessment under cathodic protection

Long

et al. 2022

Materials & Corrosion

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“…Note that the corrosion rates obtained by Tafel in the previous studies were under AC interference without considering cathodic protection. [51][52][53] Therefore, it is worth studying corrosion rate by electrochemical testing for the cases under CP with AC interference.…”

Section: Electrochemical Testmentioning

confidence: 99%

AC corrosion of steel pipeline under cathodic protection: A state‐of‐the‐art review

Farahani,

Su,

Chen

et al. 2023

Materials & Corrosion

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By the advancement of the oil, electricity, and transportation industries, an increasing number of oil and gas pipelines were buried alongside high‐voltage alternating current (AC) transmission lines and electrified railways. This resulted in a growing issue of AC interference in buried pipelines. Previous studies have shown that the presence of AC interference can result in severe corrosion damage to metallic structures, even when cathodic protection (CP) is available. This paper provides a state‐of‐the‐art review on AC corrosion of cathodically protected pipeline steel. Specifically, attention is paid to research areas including influencing factors in AC corrosion for pipelines under CP, existing AC protection criteria, corrosion risk assessment based on probability of failure, numerical simulation in AC corrosion, and mitigation of AC corrosion. Each area of research is reviewed in detail and the corresponding technical gaps and future research opportunities are identified and discussed.

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“…Thus, below the equilibrium potential, the applied cathodic current makes electrons available to the metal; therefore, no anodic electrochemical reactions can take place. Consequently, if no oxidation reaction takes place, such as iron ion production, this can occur Recently, Ibrahim et al [73][74][75] proposed a theoretical approach (Part 1, 2, 3) to evaluate the effect of double layer capacitance and electrolyte resistance on corrosion current density and potential shift. The authors stated that corrosion rate enhancement is due to the faradaic rectification as a consequence of the nonlinear current-potential relationship [73].…”

Section: Breakdown Of the Passive Film And High-ph Corrosionmentioning

confidence: 99%

AC Corrosion of Carbon Steel under Cathodic Protection Condition: Assessment, Criteria and Mechanism. A Review

2020

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Cathodic protection (CP), in combination with an insulating coating, is a preventative system to control corrosion of buried carbon steel pipes. The corrosion protection of coating defects is achieved by means of a cathodic polarization below the protection potential, namely −0.85 V vs. CSE (CSE, copper-copper sulfate reference electrode) for carbon steel in aerated soil. The presence of alternating current (AC) interference, induced by high-voltage power lines (HVPL) or AC-electrified railways, may represent a corrosion threat for coated carbon steel structures, although the potential protection criterion is matched. Nowadays, the protection criteria in the presence of AC, as well as AC corrosion mechanisms in CP condition, are still controversial and discussed. This paper deals with a narrative literature review, which includes selected journal articles, conference proceedings and grey literature, on the assessment, acceptable criteria and corrosion mechanism of carbon steel structures in CP condition with AC interference. The study shows that the assessment of AC corrosion likelihood should be based on the measurement of AC and DC (direct current) related parameters, namely AC voltage, AC and DC densities and potential measurements. Threshold values of the mentioned parameters are discussed. Overprotection (EIR-free < −1.2 V vs. CSE) is the most dangerous condition in the presence of AC: the combination of strong alkalization close to the coating defect due to the high CP current density and the action of AC interference provokes localized corrosion of carbon steel.

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AC Induced Corrosion of Underground Steel Pipelines under Cathodic Protection: III. Theoretical Approach with Electrolyte Resistance and Double Layer Capacitance for Mixed Corrosion Kinetics

Cited by 5 publications

References 5 publications

Machine learning approach to AC corrosion assessment under cathodic protection

Machine learning approach to AC corrosion assessment under cathodic protection

AC corrosion of steel pipeline under cathodic protection: A state‐of‐the‐art review

AC Corrosion of Carbon Steel under Cathodic Protection Condition: Assessment, Criteria and Mechanism. A Review

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