Sacrificial anodes, also known as galvanic anodes, are highly active metals used to protect less active metal surfaces from corrosion. This method is a form of cathodic protection, where the sacrificial anode corrodes instead of the protected metal, hence the term "sacrificial".
These anodes are typically made from metals like zinc, magnesium, or aluminium, which have a more negative electrochemical potential than the metal they protect. When attached to reinforcement, the sacrificial anode undergoes oxidation and corrodes over time. This process prevents the protected reinforcement from corroding, as the anode provides a preferential site for the electrochemical reactions.
Sacrificial anodes are widely used in concrete repairs particularly in areas of high chlorides.
Overall, sacrificial anodes play a crucial role in extending the lifespan of structures by preventing corrosion, making them an essential component in various applications.
If you have any specific questions or need more details, feel free to ask!
© 2025 EPR Contracts Limited