Lightweight aluminum anode for long-life offshore CP.
Aluminum anodes provide the highest capacity per kilogram of any sacrificial anode, making them the first choice for seawater and mud environments with low resistivity. They are commonly extruded as bracelet or plate shapes for subsea pipelines.
Compared with magnesium anode and zinc anode, aluminum alloys deliver more amp-hours per kilogram and a lighter weight profile, which reduces handling cost on large offshore projects.
| Parameter | Typical Value |
|---|---|
| Capacity | 2500 to 2800 A.h/kg |
| Driving potential | -1.10 V vs CSE |
| Typical alloy | Al Zn In |
| Density | 2.7 g/cm3 |
For very large cathodic protection networks, aluminum anodes are often complemented by an MMO anode or an ICCP system to extend design life and stabilize output.
