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.

Electrochemical Properties

Testing Items	Property	Testing Standard	Testing Result
Cable Copper Conductor	Dimension	ASTM B – 263	#6 AWG (Standard)
Cable Copper Conductor	Connection Resistance	ASTM B – 193	3.08 × 10-3 Ohm.m
MMO Wire	Dimension	ASTM B – 348	PASS
MMO Wire	Volume Resistivity	ASTM B – 193	9 – 11 mOhm.cm
Coke Breeze Backfill	Fixed Carbon	ASTM D – 172	98.5% Min.
Coke Breeze Backfill	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.	Conductor	MMO Wire Diameter	Sock Diameter	Reel Length	Current Output	Design Life
JA-MMO-FLA100	#6 AWG (HMWPE)	Φ0.06″ (Φ1.5mm)	Φ1.5″ (Φ38mm)	1000ft. (305m)	100mA/ft. (327mA/m)	25 yrs.
JA-MMO-FLA300	#6 AWG (HMWPE)	Φ0.12″ (Φ3.0mm)	Φ1.5″ (Φ38mm)	1000ft. (305m)	300mA/ft. (981mA/m)	25 yrs.

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

Main Technical Parameters

Substrate	Titanium
coating	Iridium Oxide (IrO2), Tantalum Oxide (Ta2O5)
backfill	Calcium Petroleum Coke
shape	Wire
application	Pipelines, Storage Tank
environment	Soil
Design Life	25 years

Testing

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.

Testing Details	Chemical Composition	Physical Properties & Appearance	Anode Performance
Testing Standard	ISO 9001:2015
Testing Standard	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	500ft. (152m)	Φ36″ × 30″ (Φ900 × 760mm)	473 lbs (215 kg)	540 lbs (245 kg)	24	48

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)