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CORROSION PREVENTION MATERIALS & SOLUTIONS

Anodes

Australian Mining Product and Services supplies all types of sacrificial anodes – standard or customised

Galvanic Anode (Sacrificial Anode)

galvanic anode is the main component of a galvanic cathodic protection system used to protect buried or submerged metallic structures from corrosion. They are made from a metal alloy with a more “active” voltage (more negative reduction potential / more positive electrochemical potential) than the metal of the structure. The difference in potential between the two metals means that the galvanic anode corrodes so that the anode material is consumed in preference to the structure.

The loss (or sacrifice) of the anode material gives rise to the alternative name of sacrificial anode.

There are three main metals used as galvanic anodes, Magnesium, Aluminium and Zinc.

They are all available as blocks, rods, plates or extruded ribbon. Each material has advantages and disadvantages and is made for different purposes.

 

Application

Anodes for ICCP systems are available in a variety of shapes and sizes.

Common anodes are tubular and solid rod shapes or continuous ribbons of various materials. These include high silicon cast iron, graphite, mixed metal oxide, platinum and niobium coated wire and other materials

Dimensionally Stable Anodes (DSA)

Normally, Electrodes (Anodes) consist of a basic component, which is responsible for mechanical stability and uniform current distribution. As Titanium has all these characteristics, insoluble electrodes are manufactured with titanium as a basic component.

The excellent stability of mixed metal oxide-coated titanium anodes have been used for almost 30 years. Mixed Metal Oxide-coated titanium anodes are used in various environments such as seawater, brackish water, freshwater, carbon backfill, and concrete.

Many structure owners and corrosion control engineers use Mixed Metal Oxides and coated titanium anodes only specify the sizes without understanding the characteristics, limitations and evaluation method of the anodes. There are many different size and shapes are available, wire, ribbon, mesh, expanded mesh, rod, tubular, disc, probe etc.

Corrosion Protection Junction Box /Test Posts

Application

Cathodic protection junction boxes are designed to provide a termination point anode cables, cathode (structure) cables, structure sense cable, reference electrode cables before routing to a cathodic protection rectifiers.

These junction boxes generally made of metallic or non-metallic materials. Many cases these boxes are coated with powder coating as per their location of use.

Junction boxes for positive and negative current distribution and control , and for resistance bonding are available to meet exact client specifications. Suitable for onshore and marine environments in safe and hazardous areas.

When specifying a Cathodic Protection Junction Box assembly please clarify specific hardware and components required.

Type of Enclosure: Stainless Steel 316L & 304, Aluminium Explosion Proof, Painted Mild Steel Plastic GRP, Galvanized and Painted Cast Iron Custom Finishes, Please also specify IP, NEMA or Hazardous area classification requirement.

 

Explosion-Proof Junction Box

Internal Components: Resistors, Metering, Diodes, Shunts Monitoring, Labeling, Copper Links Terminals, unidirectional blocking diodes etc.

Mounting Options & Security: Support Frames, Security / Locking, Pole mount channel, Wall mount tabs or Customer Specified….

Non-Metallic Junction Box

Cathodic Protection Cables

Application

The quality of the cable is extremely important for the efficiency of cathodic protection system, specially the anode cables.

Commonly use cathodic protection cables are PVC/PVC, PE/PVC, EPR/CSP, XLPE/PVC, XLPE/PVC/SWA/PVC, PVDF/HMWPE/ PVC/ Nylon/ PVC. PE/ Nylon/ PE.

Cables used for cathodic protection systems must be highly corrosion resistant and capable of withstanding adverse environments to which they are exposed to on a consistent basis. High Molecular Weight Polyethylene (HMWPE) is suitable for most environments.

In saline environment, we recommend KYNAR/HMWPE or HALAR/HMWPE cables, which are dual extruded highly chlorine resistant power cables. Australian Mining Product and Services supplies all types of cables used in cathodic protection system. 

HMWPE Cable for Cathodic Protection: High Molecular Weight Polyethylene (HMW-PE).

Cathodic Protection Cables: 600 Volts, Single Conductor, Stranded Copper. Stranded copper conductor conforms to ASTM Specification B-8. Insulation is high molecular weight polyethylene conforming to ASTM D-1248, Type 1, Class A, Category 5, Grades E4 & E5. Tensile Strengths Jl, J3.

Available with high-density polyethylene (Types II, III, IV) Class B & C (all colours).

Application: A direct burial DC cable for use in cathodic protection applications such as anode lead wires, header cables, structure connections, test leads and more.

The product can also be used for submerged installations in water tanks, offshore structures and other similar applications.

The polyethylene insulation is durable, abrasion resistant and flexible but has temperature and chemical limitations.

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Halar/HMWPE Cable: Cathodic Protection Cables, Primary Halar Insulation, HMW (High Molecular Weight) Polyethylene Jacket.

Stranded bare copper conductor conforms to ASTM Specification B-8. An insulation of homogeneous wall of natural ECTFE fluoropolymer (Halar) shall be extruded over the conductor, jacket insulation is high molecular weight polyethylene conforming to ASTM-D-1248, Type 1, Class A, Category 5, Grades E4 and E5. Tensile Strengths Jl, J3.

Available with high-density polyethylene (Types II, III, IV) Class B and C (all colours).

Surface printed. Custom printing is available

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Applications

Kynar/HMWPE: Cathodic Protection Cables, Primary Kynar Insulation, HMW (High Molecular Weight) Polyethylene Jacket. Stranded bare copper conductor conforms to ASTM Specification B-8. A homogeneous wall of natural PVDF fluoropolymer (Kynar) shall be extruded over the conductor.

An Insulation of high molecular weight polyethylene conforming to ASTM-D-1248, Type 1, Class A, Category 5, Grades E4 and E5. Tensile Strengths Jl, J3. Available with high-density polyethylene (Types II, III, IV) Class B and C (all colors). Surface printed. Custom printing available.

Application: A direct earth burial, DC lead, cathodic protection cable for use in deep anode groundbed installations, designed to withstand corrosive gases.

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COMPARISON BETWEEN THE CABLE TYPES

Halar v PVDF

CP Cables can have several layers of coating on them. In addition to the HMWPE layer (which can be used alone for CPC), one of the most crucial layers is fluoropolymer insulation, which is often then covered with an HMWPE jacket. More often then not CP cables have two different types of fluoropolymers: ECTFE (Halar) and PVDF(Kynar) respectively

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