How do canister anodes work in cathodic protection industry?

The MMO canister anode  is an anode form widely used in the field of cathodic protection, and its shell is usually made of metal materials such as galvanized iron sheet. According to the customer's use environment and needs, MMO tubular anodes or MMO wire anodes are installed in the barrel. The working principle is to use the anode material to undergo an oxidation reaction when in contact with the electrolyte, and transmit the anode current to the surface of the protected metal structure, thereby slowing down Or the process of preventing metals from being galvanically corroded.

When a cathodic protection system is operating, the cathode is potentially shifted to a more negative voltage, which creates a certain current flow to the anode material. At this time, an oxidation reaction occurs on the surface of the anode material to release electrons, and these electrons flow back to the metal structure through the battery potential difference that constitutes the metal structure, thereby producing a reaction to prevent corrosion that is opposite to the direction of cathodic protection. Therefore, the canister anode plays the role of cathodic protection.

Due to their compact shape, mmo canister anodes  can be easily attached to the surface of the protected object, making them a good compensation for latent deep defects, thereby increasing the efficiency and reliability of cathodic protection. In addition, the installation and maintenance of cylindrical anodes are relatively simple, and the economic benefits are relatively good, so they have been widely used.