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Stray currentStray current interference poses a significant challenge in both cathodic protectionCathodic protection (CP) systems and electrowinningElectrowinning (EW) plants, impacting safetySafety, infrastructure longevity, and operational efficacy. In CP systems, stray currentsStray current—unintended currentsCurrent from nearby railways, pipelines, or DC-powered systems—can deviate from their intended paths, creating localized anodic and cathodic sites on protected structures such as pipelines or reinforced concrete. This unintended electrochemical activity accelerates corrosionCorrosion, leading to structural degradationDegradation, increased maintenance costs, and heightened safetySafety risks. Stray currentStray current shielding methods such as sacrificial anodesAnode, grounding systems, and insulating barriers are crucial to counter these effects. These measures help divert stray currentsStray current from protected assets, particularly in urban environments with multiple DC sources, ensuring CP systems’ integrity and extending critical infrastructure's lifespan. In electrowinningElectrowinning plants, stray currentsStray current primarily arise from electrolyteElectrolyte leaks, sulfated insulatorsInsulator, or conductive structural components near cell lines. These currentsCurrent can lead to galvanic corrosionCorrosion of metallic infrastructure, increasing the risk of localized corrosionCorrosion and shock hazardsShock hazard for personnel. Stray currentsStray current also pose a unique threat in the high-moisture environments typical of EW operationsOperation, where conductive pathways are prevalent, amplifying the risk of electric shock. Effective management practices, including adherence to IEEE Standard 463 and implementing floating ground configurationsConfiguration, are essential to isolate EW cells and reduce shock hazardsShock hazard. Facilities risk compromising safetySafety and asset longevity without regular, stray currentStray current audits and proper isolation practices. Therefore, consistent monitoring and mitigating stray currentsStray current in CP and EW systems are vital to protect personnel, maintain structural integrity, and adhere to industry standards.

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Managing Stray Current in Cathodic Protection and Electrowinning Plants: Safety and Infrastructure Integrity

  • 会议论文

  • 发表日期：

    2025年

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  • Francis Dakubo

摘要

Stray currentStray current interference poses a significant challenge in both cathodic protectionCathodic protection (CP) systems and electrowinningElectrowinning (EW) plants, impacting safetySafety, infrastructure longevity, and operational efficacy. In CP systems, stray currentsStray current—unintended currentsCurrent from nearby railways, pipelines, or DC-powered systems—can deviate from their intended paths, creating localized anodic and cathodic sites on protected structures such as pipelines or reinforced concrete. This unintended electrochemical activity accelerates corrosionCorrosion, leading to structural degradationDegradation, increased maintenance costs, and heightened safetySafety risks. Stray currentStray current shielding methods such as sacrificial anodesAnode, grounding systems, and insulating barriers are crucial to counter these effects. These measures help divert stray currentsStray current from protected assets, particularly in urban environments with multiple DC sources, ensuring CP systems’ integrity and extending critical infrastructure's lifespan. In electrowinningElectrowinning plants, stray currentsStray current primarily arise from electrolyteElectrolyte leaks, sulfated insulatorsInsulator, or conductive structural components near cell lines. These currentsCurrent can lead to galvanic corrosionCorrosion of metallic infrastructure, increasing the risk of localized corrosionCorrosion and shock hazardsShock hazard for personnel. Stray currentsStray current also pose a unique threat in the high-moisture environments typical of EW operationsOperation, where conductive pathways are prevalent, amplifying the risk of electric shock. Effective management practices, including adherence to IEEE Standard 463 and implementing floating ground configurationsConfiguration, are essential to isolate EW cells and reduce shock hazardsShock hazard. Facilities risk compromising safetySafety and asset longevity without regular, stray currentStray current audits and proper isolation practices. Therefore, consistent monitoring and mitigating stray currentsStray current in CP and EW systems are vital to protect personnel, maintain structural integrity, and adhere to industry standards.