Zinc Ribbon Anode

Zinc ribbon anodes are a thin, wire-like strip of zinc metal extruded around a centralized galvanized steel wire core. This steel wire core is firmly bonded to the zinc outer shell to ensure electrical path continuity.

Zinc, being the sacrificing element in zinc ribbon anodes, contributes to a very simple, cost-effective and maintenance-free corrosion control method for buried or immersed metals such as iron, steel, aluminum or copper.

Zinc ribbon anodes are ideal for remote applications, where impressed current cathodic protection systems or constant monitoring is not feasible. They are commonly used in passive cathodic protection of metallic structures in confined spaces or high resistivity locations, such as underground carrier pipes within sleeves, closely spaced pipe networks, pipelines in rocky and mountainous terrain, wells with limited space between inner and outer casings, interstitial spaces between old, corroded and new storage tank bottoms, or narrow spaces where the anode needs to be wound around the protected structure.



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Quality Substrate Material
Our zinc ribbon anode is made from special high grade (SHG) zinc ingots with 99.995% purity. It is produced according to ASTM-B418 type I and type II alloy standards. The high-purity composition ensures the anode material is more resistant to passive films. Type I is generally used in seawater or brackish water, while Type II is used in underground and fresh water applications.

Element ASTM – B418 Type I ASTM – B418 Type II
Aluminum (Al) 0.1~0.5% 0.005% max.
Lead (Pb) 0.006% max. 0.003% max.
Iron (Fe) 0.005% max. 0.0014% max.
Copper (Cu) 0.005% max. 0.002% max.
Cadmium (Cd) 0.025% ~ 0.07% 0.003% max.
Total Impurities 0.1% max. 0.1% max.
Zinc (Zn) Remainder Remainder

High Current Output
Due to continuous ribbon formation, zinc ribbon anode can provide even distribution of current density to the cathode. Its self-regulating current output will not cause nor magnify stray currents present. With more than 90% current efficiency, its performance meets the highest industry standards.

Technical Measurement ASTM – B418 Type I ASTM – B418 Type II
Open Circuit Potential (-V) 1.05 min. 1.10 min.
Close Circuit Potential (-V) 1.00 min. 1.05 min.
Current Capacity 354A.h/lbs (780A.h/kg) 335A.h/lbs (740A.h/kg)
Current Efficiency 95% 90%
Consumption Rate 24.8 lbs/A·y (11.2 kg/A.y) 26.2 lbs/A·y (11.9 kg/A.y)

Remarks: Open/close circuit potential is with respect to a Saturated Calomel Reference Electrode.

Low Temperature Tolerance
This zinc ribbon anode is designed to perform optimally in challenging cold weather(-22ºF/ -30ºC) environments, such as thawed zones in permafrost.

Broad Application Scope
Zinc ribbon anodes are used in a variety of applications, including:

  • Cathodic protection of underground long-distance coated pipelines with low current requirements, generally in soils of 2000 ohm-cm or less with prepared gypsum-clay backfill;
  • Cathodic protection of secondary exterior bottom on above-ground storage tanks;
  • Cathodic protection of oil storage tank interior bottom areas where salt water settles out;
  • A.C. mitigation on pipelines;
  • A.C. mitigation grounding mats.
  • Grounding steel tower footings of overhead power systems.

Strict Quality Control
Jennings Anodes manufactures zinc ribbon using an advanced automatic extruder allowing for a production capacity of 2,000,000 meters annually. By conforming to ISO 9001:2015 standards, our zinc ribbon anodes are manufactured, inspected, and tested in accordance with our stringent quality control procedures to ensure peak performance.

Customized Configurations
Our zinc ribbon anode comes in four standard sizes with excellent tensile strength and hardness. It can be easily cut to any length upon request.

Item No. Cross Section Core Diameter Length Unit Weight
JA-ZR-Super 1″ × 1-¼″ (25.4 × 31.75 mm) 0.185″ (4.70mm) 100ft. (30.5m) 2.4 lbs/ft. (3.57 kg/m)
JA-ZR-Plus 5/8″ × 7/8″ (15.88 × 22.22 mm) 0.135″ (3.43mm) 200ft. (61m) 1.2 lbs/ft. (1.785 kg/m)
JA-ZR-Standard 1/2″ × 9/16″ (12.7 × 14.28 mm) 0.13″ (3.30mm) 500ft. (152m) 0.6 lbs/ft. (0.893 kg/m)
JA-ZR-Small 11/32″ × 13/32″ (8.73 × 10.32 mm) 0.115″ (2.92mm) 1000ft. (305m) 0.25 lbs/ft. (0.372 kg/m)

Main Technical Parameters






Brackish Water, Fresh Water, Seawater, Soil


Pipelines, Storage Tank


We employ rigorous foundry internal testing standards to ensure the optimum lifespan and performance of our Anodes. Each anode is labelled with a unique serial number for quality tracking. Third party testing is conducted by customer’s special request at extra charge.

Technical Measurement Chemical Composition Electrochemical Performance Physical Properties
Testing Standard ASTM B418 NACE TM0190 Foundry ITP
Testing Content Chemical Analysis Circuit Potential / Current Capacity / Current Efficiency / Electrical Resistance Dimensions & Weight / Surface Finish / Steel Core
Equipments Optical Emission Spectrometer OBLF QSN 750 Electrochemical Analyzer EPI 200 Calibrated Digital Measuring Devices

Packaging Information

We have strict packing protocols to guarantee safe delivery of our products. Clear shipping marks and documentation make delivery acceptance straightforward and simple.

Item No. Coil Size Coil Length Net Weight Gross Weight Coil Qty (per 20ft. Container)
JA-ZR-Super 35.0″ × 18.0″ (880 × 460mm) 100ft. (30.5m) 240lbs (109kg) 278lbs (126kg) 48
JA-ZR-Plus 25.5″ × 16.0″ (650 × 410mm) 200ft. (61m) 240lbs (109kg) 273lbs (124kg) 96
JA-ZR-Standard 19.0″ × 14.0″ (480 × 360mm) 500ft. (152m) 300lbs (136kg) 326lbs (148kg) 96
JA-ZR-Small 19.0″ × 14.0″ (480 × 360mm) 1000ft. (305m) 250lbs (113.5kg) 278lbs (126kg) 96

Remarks: Custom packing is available upon request.

Shipping Documents:

  • Proforma invoice
  • Packing list
  • Testing reports (Chemical Composition, Electrochemical Properties Test, Certificate of Compliance)
  • Certificate of origin (upon request)

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