Galvotec's magnesium anodes are produced in a variety of shapes and sizes for use in seawater, brackish water, and fresh water cathodic protection systems.

Composition:


Galvotec's magnesium anodes conform in composition to the requirements of U.S. Government Specification MIL-A-21412A (Ships). This 6% aluminum, 3% zinc alloy (AZ-63) usually provides the best combination of economy and operating characteristics in seawater or brackish water.

Galvanic Efficiency:

The current efficiency of Galvotec's magnesium anodes is nominally 55% in seawater and the current capacity is about 550 amp-hr/lb. The open circuit potential of the magnesium alloy used is nominally -1.55 volts to a copper/copper sulfate half cell in seawater; the driving voltage to galvanized steel is about 0.70 volts, providing a relatively high current output per anode. Both hull and condenser anodes are available with a plastisol (polyvinyl chloride) coating which serves as an excellent current barrier shield.

Applications:

Magnesium anodes are effective and economical corrosion fighters that for over 25 years have been protecting a variety of steel structures in salt, brackish and fresh water, including:

Hulls of ships, barges, tugs and boats
Ballast tanks of ore carriers and similar vessels
Bulkheads
Water storage tanks
Piers and pilings
Pipelines
Heat exchangers
Travelling screens