Zinc Ribbon Anode

Zinc Ribbon Anodes are extruded sacrificial anodes designed for cathodic protection of underground steel pipelines, storage tank bottoms, and cased crossings. Manufactured from high-purity zinc conforming to ASTM B418 Type II or MIL-A-18001K, these anodes provide reliable electrochemical protection in soils with resistivities under 2,000 ohm-cm.

Each ribbon features a continuously embedded, galvanized steel core wire that ensures low electrical resistance and structural integrity during installation. Supplied in continuous coils, zinc ribbon anodes allow for uniform current distribution over long stretches of buried infrastructure compared to discrete point anodes.

Extruded Uniformity: Continuous extrusion process ensures homogeneous cross-section, stable electrical performance, and predictable current output over the design life.

Continuous Steel Core: A central galvanized structural steel wire runs the entire length, providing mechanical strength during uncoiling and low-resistance electrical continuity for welding or pin-brazing.

Low Closed-Circuit Potential: Maintains a steady driving voltage (-1.1 V vs. Cu/CuSO₄ reference electrode) in typical soil environments, preventing hydrogen embrittlement on high-strength steel structures.

Self-Regulating Output: Naturally adjusts current output based on the polarization state of the protected structure, minimizing self-corrosion during idle periods.

Standard Cross-Section Profiles & Weights

• Regular Size (1/2" × 1"): Nominal weight 0.48 lbs/ft (0.71 kg/m), primary use in standard pipeline installations.
• Large Size (5/8" × 1-1/4"): Nominal weight 0.85 lbs/ft (1.26 kg/m), primary use in high-current density or lower soil resistivity environments.
• Mini Size (3/8" × 5/8"): Nominal weight 0.22 lbs/ft (0.33 kg/m), primary use in close-spaced AC mitigation or tight spatial clearances.

Packaging Configuration

• Standard wooden reels or steel-strapped coils.
• Coil lengths: 500 ft (152 m) or 1,000 ft (305 m) per spool. Custom coil sizing available upon request.

Underground Pipeline Protection: Installed alongside bare or poorly coated steel pipelines to mitigate soil corrosion and AC/DC interference.

Storage Tank Bottoms: Laid in a grid pattern beneath above-ground storage tanks (ASTs) to protect the exterior bottom plate.

Cased Road Crossings: Placed inside steel casings to protect carrier pipes from metallic contact and localized corrosion.

AC Mitigation: Used for grounding and discharging alternating current induced on pipelines running parallel to high-voltage power lines.

Dimensional Adjustment: Non-standard cross-section dimensions and core wire gauges available for specialized pipeline engineering designs.

Marking & Packaging: Customized reel lengths, embossed footage markers on the zinc body, and export-grade palletization designed for ocean freight.

Accessory Bundling: Pre-attached thermite weld caps, copper lead wires, or backfill mixes packaged with the shipment.

Manufacturing is governed by ISO 9001 certified protocols, ensuring full traceability from raw metal ingot to finished coil.

Raw Material Verification: Every incoming batch of Special High Grade (SHG) zinc (99.99% purity) undergoes Spectrographic Analysis (OES) to verify impurity levels before melting.

In-Process Dimensional Inspection: Laser micrometers monitor extrusion width and height continuously in-line to maintain tolerances within ± 0.5 mm.

Destructive & Bond Testing: Regular tensile and peel tests verify that the interface between the zinc body and the steel core wire withstands mechanical bending without core separation.

Documentation: Each shipment includes a Mill Test Certificate (MTC) detailing chemical composition and physical properties by heat number.

Protection from Kinking: Coils are secured on heavy-duty wooden drums or banded securely with corrugated interleaving to prevent surface gouging and mechanical deformation during transit.

Moisture Defense: Wrapped in anti-corrosion VCI (Volatile Corrosion Inhibitor) film to prevent white rust (zinc oxide formation) during long maritime transport.

Logistics Support: Packed in compliance with ISPM 15 heat-treated wood packaging regulations for seamless customs clearance into North American and European ports.

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