Stainless steel ventilation grille

The utility model discloses a stainless steel ventilation grille which comprises a frame, the surface of the frame is coated with a corrosion-resistant layer, the surface of the corrosion-resistant layer is coated with an anti-rust layer, the anti-rust layer comprises an epoxy zinc-rich primer layer, an epoxy iron red primer layer and a red lead anti-rust paint layer, and thread grooves are formed in the periphery of the surface of the frame. And a mounting bolt corrosion-resistant layer is arranged in an inner cavity of the thread groove and comprises a chlorosulfonated polyethylene coating layer, an aluminum triphosphate coating layer and a fluorocarbon coating layer. Through the arrangement of the chlorosulfonated polyethylene coating layer, the aluminum triphosphate coating layer and the fluorocarbon coating layer, the corrosion-resistant function is achieved, the frame is prevented from being corroded by the external environment in the using process, the service life of the frame is greatly prolonged, an