Tunnel fans need to work in an open environment for a long time, and are eroded by rain or other factors, resulting in rust. Although a small amount of rust will not affect the operation of the fan, it may affect the dynamic balance of the fan, increase the vibration of the fan, and affect the air intake efficiency. Use phosphoric acid or hydrochloric acid to remove rust. Phosphate is not only cheap, but also works well in removing rust. Soak the tunnel fan impeller in phosphoric acid, which turns the iron oxide into iron phosphate, which turns it into a black coating, and let it sit overnight to air dry. After the surface is dry, scrape off the iron phosphate.

In addition, we can also use vinegar or baking soda to remove rust, if not vinegar, we need to soak the tunnel fan blades for a long time, and baking soda needs to be mixed with water to form a paste, slightly thicker than toothpaste , After mixing, peel off the corrosion with an abrasive.

The above are several methods on how to derust the tunnel fan blades. In addition to the above methods, we can also use spray painting, chrome plating and other methods to prevent secondary rust. Only regular maintenance and overhaul of the tunnel fan can ensure the long-term use of the equipment. If you have other questions or puzzles about the tunnel fan, we welcome your call for consultation and look forward to cooperating with you.