Page 1 - Magnesium Anodes

Magnesium Anodes

ISO 9001 Certified
ISO 17025 Accredited cert. #3612.01

Galvotec's experience, since 1984 producing sacrificial (galvanic) anodes assures that you will
receive, the highest quality anodes in the industry, that will effectively mitigate corrosion when used in
a properly designed and maintained cathodic protection system

Galvotec Magnesium Anodes are produced in a wide variety of shapes and sizes for use in brackish or
freshwater cathodic protection systems (Magnesium Anode may also be used in specific sea water
applications)

Chemical Composition of Magnesium Anode Alloys %

ASTM AZ 63 (H-1 Alloy) High-Potential Alloy
Element Grade "A" Grade "B" Grade "C"
Aluminum (Al) 5.3 - 6.7 5.3 - 6.7 5.0 - 7.0 0.01 max.
Zinc (Zn) 2.5 - 3.5 2.5 - 3.5 2.0 - 4.0 -
Manganese (Mn) 0.15 min. 0.15 min. 0.10 min. 0.50 - 1.3
Iron (Fe) 0.003 max. 0.003 max. 0.003 max. 0.03 max.
Nickel (Ni) 0.002 max. 0.003 max. 0.003 max. 0.001 max.
Copper (Cu) 0.02 max. 0.05 max. 0.10 max. 0.02 max.
Silicon (Si) 0.10 max. 0.30 max. 0.30 max. -
Other 0.30 max. 0.30 max. 0.30 max. 0.30 max.

Magnesium Remainder Remainder Remainder Remainder

Electrochemical Properties of Magnesium Anode Alloys

High-Potential
ASTM AZ-63 (H-1 Alloy) Alloy
Grade-A Grade-B Grade-C

*Closed Circuit -1.45 to -1.55v 1.50 to -1.75v
Potential

*Open Circuit -1.50 to -1.60v -1.70 to -1.78v
Potential

% Efficiency 50 to 54 > or = to 50
Current Capacity
(Amp-Hrs/lb) 500 to 540 > or = to 500
* vs. Copper/Copper Sulfate Reference Electrode

www.galvotec.com Page 1 of 7 rev 1 2016