Galvanic Series: magnesium
Galvanic (electrochemical) series for metals and alloys in flowing seawater at ambient temperature (10–30°C). Electrode potential ranges in volts vs SCE (saturated calomel electrode), galvanic group assignments, nobility rankings, anodic index values, and compatibility thresholds for 49 materials. Covers magnesium alloys, zinc, aluminum alloys, carbon steel, cast iron, stainless steels, copper alloys, brasses, bronzes, nickel alloys, titanium, and noble metals. Used for galvanic corrosion compatibility design and sacrificial anode selection.
| material category | material name | anodic index V (V) | galvanic group | nobility rank | notes | potential max V SCE (V) | potential min V SCE (V) | potential typical V SCE (V) |
|---|---|---|---|---|---|---|---|---|
| magnesium | Magnesium alloy AZ31B | 1.85 | 1 | 1 | Most anodic; extremely active in seawater; sacrificial anode material | -1.58 | -1.6 | -1.59 |
| magnesium | Magnesium alloy AZ91D | 1.85 | 1 | 2 | Cast Mg alloy; highly anodic; used as sacrificial anode | -1.58 | -1.62 | -1.6 |
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