CATHODIC PROTECTION CABLE

Cathodic Protection Cable is a specialized electrical cable used to prevent corrosion in metal structures that are underground or underwater, like pipelines and storage tanks. It's built with a copper conductor and highly durable, corrosion-resistant plastic insulation (HMWPE). This cable delivers direct current (DC) as part of a system that sacrifices an anode to protect the main metal object from rust and degradation. Read our Cathodic Protection Cable Buyers Guide.

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CATHODIC PROTECTION CABLE

Cathodic Protection Cable is a specialized electrical conductor designed specifically to prevent the corrosion of buried or submerged metallic structures, such as pipelines, storage tanks, and well casings. In these systems, the cable carries a low-voltage DC current to anodes, effectively turning the protected structure into a "cathode" to halt oxidation. Given the harsh environments of these applications, the cable features a unique dual-layer insulation system: a primary layer of Fluoropolymer (Halar/ECTFE) for extreme chemical and chlorine resistance, and an outer jacket of High-Molecular Weight Polyethylene (HMWPE) for superior moisture and abrasion protection. This combination ensures that the cable remains operational despite exposure to corrosive gases, brackish water, and acidic soils.

Installation Note: When installing cathodic protection cable, it is vital to avoid any nicks or scratches in the Halar insulation, as even a pinhole leak can allow corrosive gases to reach the copper conductor, leading to rapid failure (the "black wire" effect). When making splices or connections to anodes, always use specialized epoxy-filled splice kits or exothermic welding (Cadweld) to ensure the connection is 100% moisture-proof. Ensure the cable is laid with sufficient slack to account for soil shifting or thermal expansion/contraction in deep-well environments.

Key Features
  • Dual-Layer Protection: Combines a Halar primary insulation with a rugged HMWPE outer jacket to survive the most aggressive chemical environments.
  • Extreme Chemical Resistance: Specifically engineered to resist chlorine, hydrogen sulfide, and other corrosive gases found in deep-well and salt-water applications.
  • High-Purity Copper Conductor: Features soft-drawn stranded copper for maximum electrical efficiency in DC current delivery.
  • Superior Moisture Barrier: The HMWPE jacket provides a near-impenetrable barrier against water ingress and soil-based electrolysis.
  • Abrasion & Impact Resilience: Built to withstand the physical stress of being "pulled" into deep-well anodes or buried in rocky terrain.
  • Direct Burial Rated: Fully certified for long-term subterranean or underwater service without the need for conduit.
  • Industry Standards: Manufactured to meet or exceed ASTM D-1248 and NACE (National Association of Corrosion Engineers) specifications.
Common Applications
  • Pipeline Protection: Connecting sacrificial anodes or impressed current systems to oil, gas, and water pipelines to prevent rust.
  • Deep Well Anode Beds: Serving as the primary lead wire for deep vertical ground beds in municipal and industrial utility zones.
  • Storage Tank Bottoms: Protecting the exterior of underground fuel, chemical, and water storage tanks from soil-side corrosion.
  • Marine & Pier Structures: Preventing the degradation of steel pilings, docks, and offshore platform supports in saltwater.
  • Well Casing Protection: Used in the oil and gas industry to extend the life of steel well casings in corrosive geological formations.
  • Bridge & Infrastructure Support: Protecting reinforcing steel (rebar) in concrete bridges and highway supports from salt-induced corrosion.
  • Submerged Metallic Equipment: Providing a reliable DC path for cathodic systems protecting pumps, valves, and water intake screens.

Resources & Guides

Category_Buying Guide
What is Cathodic Protection Cable?
December 03, 2025
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