First, the performance and use of new composite corrosion inhibitor HX-902 contains mainly salt, sulfonate copolymer, phosphine acids and other auxiliaries, can efficiently prevent calcium, magnesium, silicates, etc. sediment fouling, corrosion mitigation pipe heat transfer equipment, especially for the Yellow River water, surface water, high hardness, high alkalinity of the circulating water, cooling water systems. New composite corrosion inhibitor HX-902 inorganic phosphorus content is low, easy to control bacteria and algae slime generation. Second, the quality index Item Index chem (as PO43-) 6.0-10.0% phosphorous content (as PO33-) content% ≤ 0.40 PH (1% aqueous solution) ≤ 4.5 Solid content% ≥ 28.0 Density (20 ℃) g / cm 3 ≥ 1.12 azoles (in C6H4NHN) content% ≥ 0.80 Third, use the drug directly into the sump, the dosage is generally 40-60ppm (to supplement the water calculation). Fourth, packaging and storage of new composite corrosion inhibitor HX-902 plastic drum, 25kg / drum or 200kg / barrel, according to user needs; Store in a cool dry place, storage period of twelve months. Fifth, security new composite corrosion inhibitor HX-902 no significant stimulation of the skin, such as contact with skin, wash immediately with soap and water or water can.