MAGNETITE ANODES FOR IMPRESSED CURRENT CATHODIC PROTECTION SYSTEMS

MAGNETITE (Fe3O4 ) is a natural mineral with good conductivity and a high degree of oxidation that makes it resistant to corrosion even at high temperatures. When alloyed with small quantities of other minerals under controlled conditions, an anode with the optimal electrochemical properties and mechanical strength is produced.

Our magnetite anode is casted in hollow cylindrical forms to minimise weight and to facilitate cable to anode connections at the centre of the anode. This centre cable to anode connection allows for a uniform current dissipation at the anode surface.

The surface of the anode in the hollow centre is lined with a layer of lead of thickness and length to provide highly reliable current conduction between cable connector and anode.

The hollow annular space is filled with a dielectric compound after the cable connection is made and the ends of the anode are sealed with anode caps to prevent ingress of foreign matter.

• Operates at high current densities.
• Extremely low dissolution.
• Not susceptible to ripple in d.c. supply.
• No ceiling on d.c. voltage output.
• Light weight and easy to install, remove for inspection and reinstall.
• Centre cable to anode connection for even current distribution and consumption of anode surface.
• Independent series of examinations and selections of castings for the making of the anodes.
• The selection of anode caps and lead materials according to customers specifications and environmental conditions, is based on experience.
• Impregnable anode cap connections with corrosion resistant material and a special welding process.
• Special electrical resistance and potential tests to confirm uniform current dissipation without hot spots.
• Controlled sealing of anode hollow annular space with selected dielectric compound.

TYPE: MA-U

Diameter 60 mm Total lenght 720 mm Effective length 670 mm Total weight 6.0 kg Min. effective mass 4.7 kg Surface area 13.4 dm2 Max. current load 3.0 A Surrounding electrolyte: neutral soil and water without chlorine and sulfate content   Applications: shallow groundbeds, deep groundbeds

TYPE: MA-CS

Diameter 60 mm Total lenght 760 mm Effective length 710 mm Total weight 6.0 kg Min. effective mass 4.7 kg Surface area 13.4 dm2 Max. current load 6.0 A Surrounding electrolyte: chlorine and/or sulfate containing soil or stagnant water   Applications: shallow groundbeds, deep groundbeds

TYPE: MA-SEA

Diameter 60 mm Total lenght 760 mm Effective length 710 mm Total weight 6.0 kg Min. effective mass 4.7 kg Surface area 13.4 dm2 Max. current load 16.0 A Surrounding electrolyte: flowing seawater or brackish water   Applications: platforms, jetties, harbours

TYPE: MA-CHAIN

Diameter 60 mm Total lenght 740 mm Effective length 600 mm Total weight 6.2 kg Min. effective mass 4.7 kg Surface area 11.3 dm2 Max. current load (groundbeds) 6.0 A Max. current load (tanks) 16.0 A Surrounding electrolyte: chlorine containing soil or stagnant water   Applications: deep groundbeds open hole, deep groundbeds closed hole, water tanks

CANISTER FOR MA - U + MA - CS

COKE BACKFILL Minimum carbon content 90% Maximum moisture content 5% Maximum resistivity 1Ωm Density 700-950 kg/m3 Particle size (dia.) 20 mm max.

Standard canister Diameter (mm) Length (mm) Total weight (kg) CAN 10 160 1000 22 CAN 15 300 1500 85 CAN 20 300 2000 110