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Advanced Subsea Corrosion Protection via Modulated Impressed Current Cathodic Protection a Prototype Demonstration and Comparative Evaluation

Picture for Advanced Subsea Corrosion Protection via Modulated Impressed Current Cathodic Protection a Prototype Demonstration and Comparative Evaluation
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This study introduces a modulated Impressed Current Cathodic Protection (ICCP) system, specifically designed for Oil & Gas subsea production structures. Unlike traditional Sacrificial Anode Cathodic Protection (SACP) systems, which provide a constant output, the prototype operates on a closed-loop feedback system to dynamically control cathodic potentials within a specified voltage range. This allows for adjustments to varying environmental conditions, such as seawater temperature and microbial activity. The paper outlines the design, development, and testing of this innovative ICCP system and offers a comparative evaluation with existing SACP methods. In doing so, it addresses some of the limitations of current SACP systems, including issues like hydrogen embrittlement and premature anode depletion. The goal is to demonstrate the enhanced effectiveness and sustainability of the proposed ICCP system in subsea corrosion protection. Future work aims to integrate a patented predictive modeling feedback mechanism to further optimize the system's adaptability.
Product Number: 51324-20812-SG
Author: Herman Amaya; Behrang Fahimi; Ali Shirani; David Holberry; Nils Olav Digre
Publication Date: 2024
$40.00
$40.00
$40.00
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Picture for Assessing Coating Breakdown Factors of Silicone Rubber Thermal Insulation for Enhanced Cathodic Protection in Subsea Equipment Operations
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Assessing Coating Breakdown Factors of Silicone Rubber Thermal Insulation for Enhanced Cathodic Protection in Subsea Equipment Operations

Product Number: 51324-20350-SG
Author: Herman E Amaya; Behrang Fahimi; John Bogard
Publication Date: 2024
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This study seeks to redefine coating breakdown factors for thermal insulation coatings, whose unique electrical insulation properties have been previously overlooked in DNV RP B401, resulting in potential miscalculations in anode requirements for cathodic protection systems.1 By comparing the insulation's performance with standards like DNV RP B401 and ISO 15589-2, and through testing and analysis, this study presents refined breakdown factors and insights into optimized anode placement in subsea structures like trees and manifolds.
Picture for A Fracture Mechanics Approach To Characterizing Hydrogen Embrittlement Of Fasteners
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A Fracture Mechanics Approach To Characterizing Hydrogen Embrittlement Of Fasteners

Product Number: 51321-16798-SG
Author: Herman E. Amaya, Behrang Fahimi, Ramgopal Thodla
Publication Date: 2021
$20.00

Materials properties that are used in specific oil and gas environments are de-rated due to the risks associated with hydrogen embrittlement cracking. In oil production environments the concern is for the onset of stress corrosion cracking (SCC), while in seawater environments the concern is for Hydrogen Induced Stress Cracking (HISC). Both are hydrogen embrittlement phenomena with the distinction being the source of hydrogen for each. In SSC the source of hydrogen is from the presence of H2S in the oil production fluids, and in HISC the source of hydrogen is from the dissociation of water from the cathodic protection system. This paper is focused on the latter phenomena and aims to characterize the susceptibility of carbon alloy steels as applied in fastener applications, in a seawater environment under cathodic protection.
Picture for The Effect Of Interactions Between Cathodic Protection Potential And Stress Concentration On Hydrogen Embrittlement Of Precipitation-Hardened Nickel Alloys
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The Effect Of Interactions Between Cathodic Protection Potential And Stress Concentration On Hydrogen Embrittlement Of Precipitation-Hardened Nickel Alloys

Product Number: 51321-16663-SG
Author: Imran Bhamji; Kasra Sotoudeh; Menno Hoekstra; Herman Amaya; Bryan Fahimi
Publication Date: 2021
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