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Corrosion - Aircraft

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Galvanic Series in Seawater

A galvanic series has been drawn up for metals and alloys in seawater, which shows their relative nobility. The series is based on corrosion potential measurements in seawater. The relative position of the materials can change in other environments. The further apart the materials are in this series, the higher the risk of galvanic corrosion.

Most cathodic, noble, or resistant to corrosion to most anodic or easy to corrode
Most Resistant → →	→ → → →	→ → → →	→ → Easy to Corrode
Platinum Gold Graphite Titanium Silver Chlorimet 3 Hastelloy C	18-8 Mo stainless steel (passive) 18-8 stainless steel (passive) Chromium steel >11 % Cr (passive) Inconel (passive) Nickel (passive) Silver solder Monel Bronzes Copper Brasses	Chlorimet 2 Hastelloy B Inconel (active) Nickel (active) Tin Lead Lead-tin solders 18-8 Mo stainless steel (active) 18-8 stainless steel (active) Ni-resist Chromium steel >11 % Cr (active)	Cast iron Steel or iron 2024 aluminum Cadmium Commercially pure aluminium Zinc Magnesium and its alloys

See also:
- Galvanic compatibility
- Galvanic corrosion
- Prevention of galvanic corrosion by design
- Potential of metals in soils
- Stagnant seawater (Handbook)
- Stagnant seawater (MIL-STD-889)
- Flowing seawater