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ProMag Magnesium Anodes for Cathodic Protection by Farwest Corrosion

ProMag Magnesium Anodes for Cathodic Protection by Farwest Corrosion
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Specialty Magnesium Anodes

Farwest Corrosion Control offers a complete line of specialty cast and extruded sacrificial magnesium anodes for a variety of uses. These anodes can be submerged in fresh, brackish or seawater environments. Many of the anodes are available with an optional Plastisol coating designed to be cut away from the anode, limiting surface area contact and current output.

Galvanic Efficiency

Anodes are produced to H-1 or AZ-63 specifications and have a current efficiency of approximately 55% in seawater with a current capacity of 550 amp/hour per pound. Open circuit potential of this alloy is nominally -1.55 volts with respect to a copper-copper sulfate reference electrode.

Chemical Composition (%)

Element

H - Grade B

Aluminum

5.3 - 6.7%

Manganese

0.15% min

Zinc

2.5 - 3.5%

Silicon

0.30% max

Copper

0.05% max

Nickel

0.003% max

Iron

0.003% max

Other

0.30% max

Magnesium

Remainder

Applications

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

  • 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
  • Traveling screens