In a corrosive environment, after the plant is used for a period of time, rust and corrosion may appear on the roof surface (color steel plate, sandwich panel, etc.). As the corrosion intensifies, the color steel plate will corrode more and more severely until the rust wears out. Leaking water and having to replace the roof panels will not only increase the cost of manpower and material resources, but also cause shutdowns, delays in production, and greater losses.