Sacrificial (Galvanic) Anodes
Cathodic protection can also be achieved by a more traditional way: through sacrificial (galvanic) anodes. This method entails connecting the protected metal structures with a more active metal or alloy.
When two metals are electrically connected to each other in an electrolyte (e.g. seawater), the more active metal (anode) supplies a current and dissolves (sacrifices) to effectively protect the other metal (structures).
Sacrificial anodes are cast with high-efficiency alloys and are characterized by being light-weight and having a high amperage output. They can function economically and efficiently without any maintenance during the operating period to control the corrosion. Furthermore, after installation, there are no labor costs involved and no electrical supply is required.
- Port installations
- Offshore engineering
- Underground structures
- Power plants, refineries and chemical plants
- Reinforced concrete structures and buildings’ piling foundations