Known simply as “zincs” by most people, sacrificial anodes consist of a series of different alloys like magnesium, aluminium, and zinc—the latter being the most popular. Each metal is tailormade to adapt to a specific environment. For example, most fibreglass vessels operating in seawater use anodes devised from a zinc alloy.
All sacrificial anodes serve a single purpose: to prevent or curb corrosion of underwater metals like stainless-steel propeller shafts, rudderstocks, and bronze through-hull fittings. Each of these metals must be protected by a sacrificial anode at all times, through the vessels bonding system.
How Aluminium Anodes Work
For cathodic protection to take place, pieces of sacrificial anodes are amalgamated together electrically to the ship’s hull. The anodes are made of metals, which are more vigorous and more reactive than the material used to form a ship’s body and systems. Consequently, the anodes corrode together instead of the ship’s system and body–but ensure the ship is fully protected. Because of this enhanced protection, ship owners coined the anodes the term “Sacrificial Anodes.” The anodes are also used on dock gates, ballast, pipelines, ships and boat-hulls, wind turbine foundations and more.
Benefits of Aluminum Anodes
Aluminum anodes have an array of benefits. They’re very reliable, require no maintenance costs, and experience no risks of interference. The anodes also last long, and many of them are compatible with most CP systems found on subsea vessels. More importantly, ship owners find aluminium anodes very convenient and adaptable, for their ability to fit seamlessly into any marine and offshore environment with no hazard risk.
Aluminium Sacrificial Anodes can be used to protect metals that are either partially or fully submerged under seawater. Their ability and resilience to withstand any heavy corrosion make them a top safeguard priority for metals immersed in seawater, freshwater, and any other marine and offshore environs. Every boat owner should consider nothing else, other than safeguarding his or her marine vessels with aluminium sacrificial anodes to prevent and curb metal corrosion.