Permeability of coal tar enamel coating to cathodic protection current on pipelines

Yin, Ke; Yang, Yintang; Cheng, Y. Frank

doi:10.1016/j.conbuildmat.2018.10.123

Cited by 15 publications

(3 citation statements)

References 12 publications

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“…Research [15] shows that up to 85% of all external pipeline corrosion has been linked to dissolved CP shielding coatings. Non-shielding coatings allow CP current to pass through the ceramic layer and onto the steel substrate [16].…”

Section: Article Historymentioning

confidence: 99%

Evaluation of Cathodic Protection System for Pipelines at Brega Petroleum Marketing Company in Libya

Khalid,

Awath,

Fadiel

2024

adeletters

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Cathodic protection (CP) is the most effective method for protecting petroleum facilities against corrosion. As part of this protection, care should be taken to continuously evaluate the existing system in order to maintain the system in favorable conditions. The subject of the paper’s research is an oil plant for the transportation of oil derivatives located at the Brega company in Tobruk, Libya. In the present work, a case study on how to evaluate the CP system for an existing company for petroleum transportation is considered. The procedure was planned in three steps. The first step is a historical survey of the CP system from when the company started. The second was a diagnostic analysis study of the problem and how to fix it along the system. The third is the conclusions and recommendations regarding the measures for evaluating the CP system without stopping production.

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Section: Article Historymentioning

confidence: 99%

Evaluation of Cathodic Protection System for Pipelines at Brega Petroleum Marketing Company in Libya

Khalid,

Awath,

Fadiel

2024

adeletters

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“…Large portions of the pipelines installed in previous decades used coal tar enamel as a protective coating due to its several advantages, including a porous structure that allows cathodic current to flow through its matrix, preventing shielding effects. [16,17] However, due to its toxicity and carcinogenic potential, the usage of coal tar coatings is highly discouraged. [18] Nowadays, the new segments of pipe are coated in industrial plants which produce high-functioning coatings, such as fusion bonded epoxy (FBE), three-layer polyethylene (3LPE), and heat shrinkable sleeves, [16] which do not present the same permeability to cathodic current as coal tar.…”

Section: Introductionmentioning

confidence: 99%

Long‐term cathodic disbondment tests in three‐layer polyethylene coatings

Freitas

Brasil

Leoni

et al. 2023

Materials & Corrosion

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Cathodic protection allied to a polymeric coating is one of the most employed techniques to protect buried steel pipelines against corrosion. Nevertheless, cathodic disbondment, a phenomenon associated with such protection in highperformance coatings such as (three-layer polyethylene [3LPE]), still concerns the oil and gas segment regarding pipeline integrity. The present work was part of a Program of Integrity Management and studied in field-like conditions the influence of cathodic potential, type of soil and coating system on the coating disbondment of buried pipelines for 450 days. The coating systems herein studied simulated the patching between aged (coal tar) and new coatings (3LPE), a standard procedure during damaged pipeline repair. Results pointed out that the combination between aged (coal tar) and new coatings (3LPE) in a pipe segment reduced coating disbondment when compared to the systems where 3LPE was the sole type of coating. Moreover, it was shown that more cathodic potentials (<−1100 mV) and the aggressiveness of the industrial soil herein tested induced disbondment diameters as high as 15.5 mm.

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“…Coatings with excellent anti-corrosive and conductive properties can be prepared by combining superhydrophobicity and conductivity features, which can improve comprehensive performance and overcome the problems that plague traditional mine coatings in terms of both conductivity and corrosion protection [23].…”

Section: Introductionmentioning

confidence: 99%

Stable and Durable Conductive Superhydrophobic Coatings Prepared by Double-Layer Spray Coating Method

et al. 2021

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Herein, a low cost, durable, and stable conductive superhydrophobic composite coating (CSC coating) was fabricated on a Q345 steel surface by simple double-layer spray coating. The water contact angle (WCA) of the CSC coating was 160° and the sliding angle (SA) was 3°. In addition to its excellent conductivity (3.10 × 103 Ω), the fabricated composite coating had good durability and wear resistance. After 10 sand-washing cycles, the CSC coating surface still exhibited stable superhydrophobicity (149° WCA, 9.5° SA). At 200 g pressure, the surface of the optimized CSC coating still maintained fine superhydrophobicity (150° WCA, 9.2° SA) and conductivity (1.86 × 104 Ω) after 10 abrasion cycles. In addition, it also exhibited fine adhesion (0.307 MPa) between the composite coating and the substrate. This functional superhydrophobic surface can be applied in specialty fields with harsh conditions such as coal mining and petrochemical activities. This new coating may also expand the application fields of superhydrophobic surfaces and have broad practical application prospects.

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Permeability of coal tar enamel coating to cathodic protection current on pipelines

Cited by 15 publications

References 12 publications

Evaluation of Cathodic Protection System for Pipelines at Brega Petroleum Marketing Company in Libya

Evaluation of Cathodic Protection System for Pipelines at Brega Petroleum Marketing Company in Libya

Long‐term cathodic disbondment tests in three‐layer polyethylene coatings

Stable and Durable Conductive Superhydrophobic Coatings Prepared by Double-Layer Spray Coating Method

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