| Nobilty Ranking | Metal or Alloy |
|---|---|
| ANODIC | |
| Actively Corrode | Magnesium anode alloy – high potential |
| Magnesium anode alloy – low potential | |
| Aluminium anode alloys | |
| Zinc anode alloys | |
| Aluminium alloys | |
| Cast iron | |
| Carbon steel (mild steel) | |
| Copper alloys (brass/bronze) | |
| Cupronickels | |
| Copper | |
| Nickel | |
| 316 stainless steel (active) | |
| Silver | |
| Titanium | |
| 304 stainless steel (active) | |
| Silver | |
| Titanium | |
| 304 stainless steel (passive) | |
| CATHODIC | |
| Noble Passive | 316 stainless steel (passive) |
| Platinum | |
| passive | |
| Gold | |
| Graphite |