The product is easy to dissolve in water, strong dissolution, high speed, obvious effect. Chemical cleaning for circulating water cooling system, suitable for steel, copper, copper alloy, stainless steel, etc.. Can quickly remove the rust and scale of calcium heat exchanging equipment, oil and other organic matter and the early part of the metal surface activation, is conducive to the film to get clean and in the active state all metal surfaces, can prevent the corrosion of the metal surface of the initial water.