# 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)

1. GREEN - Metals in harsh or marine environments such as salt spray or salt water. Volt potential difference equal or less than 0.15V.
2. BLUE - Metals in normal environments without temperature or humidity control, warehouse storage. Volt potential difference equal or less than 0.45V.
3. YELLOW - Metals in controlled environments with temperature and humidity control. Volt potential difference equal or less than 0.95V.
4. RED - Not recommended.