Galvanic Compatibility Chart
| MIL-STD 1250A (Reference) |
Gold
|
Graphite, Rhodium
|
Silver
|
Nickel, Monel
|
Copper, Bronze
|
Nickel silver
|
Stainless Steel
|
Brass
|
Chromium
|
Tin
|
Tin-lead solder
|
Lead
|
Iron, Steel
|
Aluminum
|
Cadmium
|
Galvanized Steel
|
Hot-dip-zinc plate
|
Zinc
|
Magnesium
|
|
| Volt | 0.15 | 0.05 | 0.00 | -0.15 | -0.20 | -0.20 | -0.20 | -0.30 | -0.45 | -0.50 | -0.50 | -0.55 | -0.70 | -0.75 | -0.80 | -1.05 | -1.05 | -1.10 | -1.60 | |
| Gold | 0.15 | |||||||||||||||||||
| Graphite, Rhodium | 0.05 | -0.10 | ||||||||||||||||||
| Silver | 0.00 | -0.15 | -0.05 | |||||||||||||||||
| Nickel, Monel | -0.15 | -0.30 | -0.20 | -0.15 | ||||||||||||||||
| Copper, Bronze | -0.20 | -0.35 | -0.25 | -0.20 | -0.05 | |||||||||||||||
| Nickel silver | -0.20 | -0.35 | -0.25 | -0.20 | -0.05 | 0.00 | ||||||||||||||
| Stainless Steel | -0.20 | -0.35 | -0.25 | -0.20 | -0.05 | 0.00 | 0.00 | |||||||||||||
| Brass | -0.30 | -0.45 | -0.35 | -0.30 | -0.15 | -0.10 | -0.10 | -0.10 | ||||||||||||
| Chromium | -0.45 | -0.60 | -0.50 | -0.45 | -0.30 | -0.25 | -0.25 | -0.25 | -0.15 | |||||||||||
| Tin | -0.50 | -0.65 | -0.55 | -0.50 | -0.35 | -0.30 | -0.30 | -0.30 | -0.20 | -0.05 | ||||||||||
| Tin-lead solder | -0.50 | -0.65 | -0.55 | -0.50 | -0.35 | -0.30 | -0.30 | -0.30 | -0.20 | -0.05 | 0.00 | |||||||||
| Lead | -0.55 | -0.70 | -0.60 | -0.55 | -0.40 | -0.35 | -0.35 | -0.35 | -0.25 | -0.10 | -0.05 | -0.05 | ||||||||
| Iron, Steel | -0.70 | -0.85 | -0.75 | -0.70 | -0.55 | -0.50 | -0.50 | -0.50 | -0.40 | -0.25 | -0.20 | -0.20 | -0.15 | |||||||
| Aluminum | -0.75 | -0.90 | -0.80 | -0.75 | -0.60 | -0.55 | -0.55 | -0.55 | -0.45 | -0.30 | -0.25 | -0.25 | -0.20 | -0.05 | ||||||
| Cadmium | -0.80 | -0.95 | -0.85 | -0.80 | -0.65 | -0.60 | -0.60 | -0.60 | -0.50 | -0.35 | -0.30 | -0.30 | -0.25 | -0.10 | -0.05 | |||||
| Galvanized steel | -1.05 | -1.20 | -1.10 | -1.05 | -0.90 | -0.85 | -0.85 | -0.85 | -0.75 | -0.60 | -0.55 | -0.55 | -0.50 | -0.35 | -0.30 | -0.25 | ||||
| Hot-dip-zinc plate | -1.05 | -1.20 | -1.10 | -1.05 | -0.90 | -0.85 | -0.85 | -0.85 | -0.75 | -0.60 | -0.55 | -0.55 | -0.50 | -0.35 | -0.30 | -0.25 | 0.00 | |||
| Zinc | -1.10 | -1.25 | -1.15 | -1.10 | -0.95 | -0.90 | -0.90 | -0.90 | -0.80 | -0.65 | -0.60 | -0.60 | -0.55 | -0.40 | -0.35 | -0.30 | -0.05 | -0.05 | ||
| Magnesium | -1.60 | -1.75 | -1.65 | -1.60 | -1.45 | -1.40 | -1.40 | -1.40 | -1.30 | -1.15 | -1.10 | -1.10 | -1.05 | -0.90 | -0.85 | -0.80 | -0.55 | -0.55 | -0.50 | |
Cathotic metals - least susceptible to corrosion (noble to less noble - vertical to horizontal)
Anodic metals - most susceptible to corrosion (less noble to noble - horizontal to vertical)
- GREEN - Metals in harsh or marine environments such as salt spray or salt water. Volt potential difference equal or less than 0.15V.
- BLUE - Metals in normal environments without temperature or humidity control, warehouse storage. Volt potential difference equal or less than 0.45V.
- YELLOW - Metals in controlled environments with temperature and humidity control. Volt potential difference equal or less than 0.95V.
- RED - Not recommended.