Prepacked Magnesium anodes

The bare Magnesium anode is assembled with cable , sealed with epoxy resin and packaged in a cotton bag.

Backfill Mixture Composition:

Ground Hydrant Gypsum 75%

Powdered Bentonite 20%

Hydratate Sodium Sulphate 5%

The high cost of corrosion can be substantially reduced by installing a cathodic protection
system to transfer the corrosion from the structure being attacked to an anode system.
Corrosion takes place when an anode and cathode are electrically connected and are
surrounded by an electrically conductive electrolyte, such as moisture in the soil. When
these conditions occur, an electrical current will flow, and the anode will be consumed.

Because magnesium is one of the least noble elements, it makes a superior sacrificial
anode for the protection of underground steel pipelines and structures, and water heaters.
By connecting a magnesium anode to a structure of a different metal, electrical current is
generated that polarizes the structure, making the entire surface cathodic and protection
complete.

Magnesium Anodes have a more negative potential than Aluminum Anodes or Zinc Anodes and is more suitable for areas where the electrolyte (soil or water) resistivity is higher. Magnesium Anodes are generally used on vessels in fresh water environments and in water heaters / boilers. In some cases, the higher negative potential of magnesium can be a disadvantage. If the potential of the protected metal becomes too negative, hydrogen may be released from the cathode surface which may lead to acellerated corrosion