MMO Linear Anode

MMO linear anodes, also known as flexible anodes, are an ideal product for use when a low-current, evenly distributed cathodic protection system is needed. The core of the anode is composed of high-grade, titanium wire with a Ir–Ta mixed metal oxide catalyst coating. The titanium wire is prepackaged in a porous, non-woven fabric “sock” that contains high conductivity calcined petroleum coke breeze —— enhancing the anodes abrasion and damage resistance.

The power cable attached is #6 AWG stranded copper with either high molecular weight polyethylene (HMWPE) insulation or a dual insulation of Kynar/HMWPE. This cable has the capacity to maintain the required current over considerable distance without incurring substantial longitudinal voltage drop.

The MMO linear anode has the advantage of easy installation and handling as well being cost efficient. Typical uses for this anode include the impressed current cathodic protection of in-plant piping, buried oil (gas) pipelines, petrochemical container, tank bottoms and other underground structures.

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Key Features

Quality Substrate Material

Oue linear anode is comprised of Gr1 or Gr2 titanium wire (ASTM B348) with IrO2/Ta2O5 based MMO catalyst coating. Unique sintering coating technology allows for long product life.

Evenly Backfill Filling

High performance calcined petroleum coke breeze is tightly pre-packaged and evenly distributed all around the anode, serving as the active matrix in which the electrochemical reactions take place.

Protective Braid Fabric Jacket

MMO linear anode is prepackaged within porous, woven acid-resistant synthetic sleeve. This tough sleeve is sewn together using a poly two or four-thread double interlocking stitch, which prevents the seam from separating during installation, or when stored in high temperature conditions.

Reel Packing for Easy Transportation

The sock diameter is approximately 1.5 inches and is installed directly, from the factory provided reel, into the trench. Wooden or steel reels are supplied as required.

Reliable Connection

The MMO titanium wire is connected to the power cable in parallel via a heavy-duty crimp to ensure low resistance. The connection joint is then sealed in a splice kit with epoxy resin to prevent water intrusion.

MMO Linear Anode Sock Line Drawing

Electrochemical Properties

Testing Items Property Testing Standard Testing Result
Cable Copper Conductor Dimension ASTM B – 263 #6 AWG (Standard)
Connection Resistance ASTM B – 193 3.08 × 10-3 Ohm.m
MMO Wire Dimension ASTM B – 348 PASS
Volume Resistivity ASTM B – 193 9 – 11 mOhm.cm
Coke Breeze Backfill Fixed Carbon ASTM D – 172 98.5% Min.
Resistivity G.L.C.-C-12A, 10 bar (145psi) @23℃ (73℉) 0.1 Ohm.cm
Cable Joint Resistivity ASTM B – 193 1.0 mOhm Max.
Fabric Jacket Weight 80g/m² Min. 80g/m²
Bursting Strength ISO 3303 500N Min.
Abrasion Resistance ASTM D – 4157 100 Cycles to Failure
Fluid Resistance 6 months Immersion Test PASS
Chlorine Resistance 6 months Immersion Test PASS
UV Resistance ASTM G-53: 8 hours @60℃ (140℉) 4 hours @50℃ (122℉) 55% Tear Strength Loss

Specifications

Item No. MMO Wire Diameter Cable Conductor Sock Diameter Length Current Output Design Life
JA-MMO-FLA100-S Φ0.06″ (Φ1.5 mm) #6 AWG (HMWPE) Φ1.5″ (Φ38mm) 500 ft. (152 m) 100mA/ft. (327mA/m) 25 yrs.
JA-MMO-FLA100-M Φ0.06″ (Φ1.5 mm) #6 AWG (HMWPE) Φ1.5″ (Φ38mm) 1000 ft. (305 m) 100mA/ft. (327mA/m) 25 yrs.
JA-MMO-FLA100-L Φ0.06″ (Φ1.5 mm) #6 AWG (HMWPE) Φ1.5″ (Φ38mm) 1500 ft. (457 m) 100mA/ft. (327mA/m) 25 yrs.
JA-MMO-FLA300-S Φ0.12″ (Φ3.0mm) #6 AWG (HMWPE) Φ1.5″ (Φ38mm) 500 ft. (152 m) 300mA/ft. (981mA/m) 25 yrs.
JA-MMO-FLA300-M Φ0.12″ (Φ3.0mm) #6 AWG (HMWPE) Φ1.5″ (Φ38mm) 1000 ft. (305 m) 300mA/ft. (981mA/m) 25 yrs.
JA-MMO-FLA300-L Φ0.12″ (Φ3.0mm) #6 AWG (HMWPE) Φ1.5″ (Φ38mm) 1500 ft. (457 m) 300mA/ft. (981mA/m) 25 yrs.

Remarks: Customized lengths and current output variations are available at request.

Main Technical Parameters

Substrate

Coating

,

Backfill

Calcium Petroleum Coke
Shape

Application

,

Environment

Design Life

Testing

We employ rigorous 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.

Testing Details Chemical Composition Physical Properties & Appearance Anode Performance
Testing Standard ISO 9001:2015
ASTM E120 Foundry ITP & customer specification NACE TM0108 / ASTM D3359
Testing Content Chemical Analysis of MMO Substrate Weight / Dimensions / Physical Appearance / Cable Specification & Length / Anode Header / Cable Length Structure and Thickness of MMO Catalyst Coating / Anode Current Density / Anode Life
Equipment & Devices Third Party / Sub-contractor Calibrated Digital Measuring Devices JCM-6000 Plus Scanning Electron Microscope / DWW-K-100 Galvanostat / VCC101A Multimeter / Calomel Reference Electrode

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. Anode Length ( per reel) Reel Dimensions (Dia. x D) Weight Reel Qty
N.W. G.W. 20ft. Container 40ft. Container
JA-MMO-FLA100-S 500ft. (152m) Φ36″ × 32″ (Φ914×812 mm) 473 lbs (215 kg) 540 lbs (245 kg) 24 48
JA-MMO-FLA100-M 1000 ft. (305 m) Φ42″ × 40″ (Φ1067×1016 mm) 947 lbs (430 kg) 1036 lbs (470 kg) / /
JA-MMO-FLA100-L 1500 ft. (457 m) Φ46″ × 41″ (Φ1168×1041 mm) 1421 lbs (645 kg) 1543 lbs (700 kg) / /
JA-MMO-FLA300-S 500ft. (152m) Φ36″ × 32″ (Φ914×812 mm) 473 lbs (215 kg) 540 lbs (245 kg) 24 48
JA-MMO-FLA300-M 1000 ft. (305 m) Φ42″ × 40″ (Φ1067×1016 mm) 947 lbs (430 kg) 1036 lbs (470 kg) / /
JA-MMO-FLA300-L 1500 ft. (457 m) Φ46″ × 41″ (Φ1168×1041 mm) 1421 lbs (645 kg) 1543 lbs (700 kg) / /

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)

MMO Linear Anode Datasheet

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