▎ 摘　　要

NOVELTY - Method for inhibiting electrochemical corrosion of ductile iron water supply pipelines involves mixing prepared modified graphene oxide material with silane, and carrying an electrochemical deposition method to obtain an electrochemical corrosion resistant film layer having a nano thickness of 80-90 nm, where the prepared modified graphene oxide material is prepared by (a) adding graphite powder to flask, adding sulfuric acid and phosphoric acid, stirring, adding potassium permanganate, heating, dripping hydrogen peroxide, and (b) centrifuging the obtained reactant, washing and drying the precipitated material, mixing dried graphene oxide with lauramide, hexadecylamine, stearic acid and acetone, heating, filtering, and drying. USE - The method is useful for inhibiting electrochemical corrosion of ductile iron water supply pipelines. ADVANTAGE - The method improves service life of water supply pipe of nodular cast iron material, enhances corrosion resistance of iron material, and solves the technical problem of the easy corrosion of the water supply pipe represented by the nodular cast iron material. DETAILED DESCRIPTION - Method for inhibiting electrochemical corrosion of ductile iron water supply pipelines involves mixing prepared modified graphene oxide material with silane, and carrying an electrochemical deposition method to obtain an electrochemical corrosion resistant film layer having a nano thickness of 80-90 nm, where the prepared modified graphene oxide material is prepared by (a) adding 3.4-3.6 g graphite powder to a flask, adding 45-50 ml sulfuric acid with a molar concentration of 1.5-2 mol/l and 5-7 ml phosphoric acid with a molar concentration of 0.75-0.8 mol/l to the flask under stirring for 20-30 minutes, adding 16-20 g potassium permanganate, continuing stirring for 30-40 minutes, heating in a water bath at 50-53 degrees C, heat preserving and sealing for reacting for 8-10 hours, cooling to room temperature by adding 300-320 ml ice water, dripping hydrogen peroxide until the color of the system turns bright yellow, and (b) centrifuging the obtained reactant in a centrifuge, washing the resulted precipitate in a beaker with hydrochloric acid for 2-3 times, washing it with absolute ethanol 2-3 times and finally with deionized water to neutrality, drying the precipitated material in a ventilated drying oven at 90-100 degrees C for 10-12 hours, adding the dried graphene oxide in a 4-necked flask with 0.23-0.26 g lauramide, 0.35-0.39 g hexadecylamine, 0.8-0.9 g stearic acid and 16-20 g acetone, heating at 55-56 degrees C under stirring for 1-2 hours, cooling to 25-30 degrees C, pumping under reduced pressure after filtering, and drying the resulted product in an oven at 70-80 degrees C for 15-20 hours.