Magnesium anode 21x165 3/4" 22174

Corrosion protection for tanks – magnesium anodes

A magnesium anode is a key element in protecting tanks, especially those with enamel coating, against the harmful effects of corrosion. Made of a magnesium alloy, this anode works on the principle of cathodic protection. In practice, this means that if damage occurs to the enamel coating, the magnesium anode corrodes instead of the steel tank. This extends the life of the device and ensures its reliable operation.

The 21x165 anode with a ¾” thread is dedicated to a wide range of popular boiler and tank models, including OW-E5/10/15/15.1, OW-E 30.1+/50.1+, OW-E 40.5 VIKING E 30 and VIKING SMART 60. Its versatility makes it a solution for both professional installers and end-users looking for reliable protection of their equipment.

How does a magnesium anode work?

The principle of operation of a magnesium anode is based on the difference in electrochemical potentials between the tank material (steel) and the anode (magnesium). Magnesium is an electrochemically more active metal than steel, which means it corrodes more easily. When micro-defects occur in the enamel coating, the anode becomes a place of preferential corrosion – instead of steel, it dissolves. This process generates a protective current that protects the surface of the tank from further damage. It should be remembered that the magnesium anode wears out over time and requires periodic replacement – the more intensively the tank is used, the faster this process occurs.

Key features and benefits

• Effective cathodic protection: Prevents tank corrosion by preferentially dissolving the magnesium anode.
• Compatibility: Designed for a wide range of boilers and tanks with a ¾” thread.
• Simple installation: Replacing the anode is relatively easy and does not require specialized tools – simply unscrew the old anode and screw in a new one.
• Extended lifespan: By protecting the tank from corrosion, the magnesium anode significantly extends its life and ensures trouble-free operation for a long time.
• Prevention of costly repairs: Regular anode replacement avoids serious damage to the tank caused by corrosion, which translates into financial savings in the long run.
• Physiologically non-aggressive alloy: The magnesium alloy used is safe for health and does not negatively affect the quality of water in the tank.