AMPP Store - Products tagged with 'coating disbondment'

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51318-10544-Cathodic Protection, Coatings that Shield Cathodic Protection, Stress Corrosion Cracking and Corrosion Assessment in Aging Coated Pipe Lines and Buried Utility Structures

Product Number: 51318-10544-SG

Author: Mehrooz Zamanzadeh / George T. Bayer / Anil Kumar Chikkam

Publication Date: 2018

$20.00

Here we would like to elaborate on corrosion risk associated with coatings that shield cathodic protection.

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51318-10841-BARE FIELD JOINT FOR SUSBEA PIPELINES A POSSIBLE ALTERNATIVE ?

Product Number: 51318-10841-SG

Author: Gwenaëlle Benoit / Morgan Gouriou / Denis Melot / Jean Vittonato / Nicolas Larché

Publication Date: 2018

$20.00

An experiment to simulate bare field joint configuration under cathodic protection over a long term exposure in seawater on a 3LPE coated pipe section in renewed seawater and half-buried in mud. Results conclude that the bare field joint concept is feasible.

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51318-11023-Effect of Soil and Disbondment Configuration on CP Penetration into Coating Disbondment

Product Number: 51318-11023-SG

Author: Li Yan / Jean-Philippe Gravel / Muhammad Arafin

Publication Date: 2018

$20.00

Tests to investigate the effect of soil and disbondment configuration on CP penetration into coating disbondment. Experimental setup measured the pH and potential of pipeline steel under a disbonded coating without disturbing the environment inside.

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Application Of Direct Assessment Methods In Arid And “Sabkha” Environments

Product Number: 51321-16756-SG

Author: Naim Dakwar; D. L. van Oostendorp

Publication Date: 2021

$20.00

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Enhancing Cathodic Protection System Design and Operation Efficiency by Numerical Modeling

Product Number: MECC23-20032-SG

Author: Seonyeob Li; Ashwaq Al Jasmi; Sungwon Jung; Il Yoo; Omar El Sinnary; Kyeong-Wan Park

Publication Date: 2023

$20.00

Cathodic protection (CP) is a well-established technique that effectively prevents corrosion of metals by adjusting the equilibrium potential of metallic structures in an electronegative direction. As the applied current increases, it reduces the anodic dissolution rate, thus leading to a decrease in the corrosion rate. The effectiveness of CP can be confirmed by measuring the protection potential values along the structures, ensuring the uniformity of the applied current, and observing the resultant potential distribution in the field.

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Extending the Life of an Ageing Forty Two Years Old Offshore Wet Crude Pipeline

Product Number: 51322-17532-SG

Author: Faisal M. Al-Abbas, Qasim Saleem, Bander Al-Otaibi, Balasubramani Bakthavatchalu, Ebadul Haque

Publication Date: 2022

$20.00

The hydrocarbon exploration in the ocean and deep sea was started as early as early as the 1850s, when the first drilling was carried out in California, USA. Other early oil explorations activities were later recorded in Pakistan (1886), Peru (1869), India (1890) and Dutch East Indies (1893).1 In 1930s, the development of the Gulf of Mexico as an offshore area started with oil first being produced in 1938.1 The production from the North Sea brought more technical challenges to the offshore industry.

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Overview of latest advances in measuring and understanding cathodic protection current permeability by organic coatings

Product Number: 51320-14685-SG

Author: Facundo Varela, Mauricio Latino, Yongjun Tan, Maria Forsyth

Publication Date: 2020

$20.00

Shielding of cathodic protection (CP) by disbonded coatings is considered a “worst case scenario” for external corrosion in the pipeline industry. It has been hypothesized that if coatings were partially permeable to CP, the imbalance between cathodic and anodic reactions would induce a high pH environment under disbonded coatings and that would impede corrosion. However, direct experimental evidence of this process has been limited. Moreover, this line of reasoning is often inversed incorrectly assuming that the only reason for the presence of a high pH environment under disbonded coatings is their partial permeability to CP current.

The recent development of an electrochemical self-validating technique to measure the relatively small ionic currents that could permeate through defect free coatings has shed a new light on the topic. It has been found that most of the commercial pipeline coatings tested in unaged conditions present a CP shielding behavior. Accelerated hydrothermal ageing of fusion-bonded epoxy (FBE) coatings was performed to study the effect of water absorption. Ageing resulted in major plasticization, which increased the conduction of CP current through FBE coatings. However, FBE seems to be partially permeable to H+ and/or OH-, which reduces its ability to form and retain a high pH environment under disbonded coatings. In conjunction, these results thus indicate the extremely limited capability of commercial pipeline coatings to prevent corrosion in case of disbondment.

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Penetration of Cathodic Protection into Pipeline Coating Disbondment

Product Number: 51317--9146-SG

ISBN: 9146 2017 CP

Author: Li Yan

Publication Date: 2017

$20.00

An experimental setup was designed to investigate the cathodic protection (CP) penetration into coating disbondment. Embedded detection probes underneath the disbondment enabled pH and steel potential measurements without disturbing the environment inside the disbondment.

Products tagged with 'coating disbondment'

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