▎ 摘　　要

NOVELTY - Wear-resistant and corrosion-resistant polypropylene steel-plastic composite pipe, comprises a carbon steel pipe and a wear-resistant and corrosion-resistant polypropylene composite pipe compounded on the inner wall of carbon steel pipe. The wear-resistant and corrosion-resistant polypropylene composite pipe comprises 100 pts. wt. pipeline-grade polypropylene resin, 15-25 pts. wt. compatibilizer, 10-16 pts. wt. combined filler, 1-3 pts. wt. surface modifier, 0.5-3 pts. wt. dispersant, 0.2-1.2 pts. wt. antioxidant, 0.2-1.2 pts. wt. anti-ultraviolet agent. The combined filler is graphene particle, a crystallized ceramic particle, and modified molybdenum disilicide in a ratio of (10 to -20):(30-50):100. The modified molybdenum disilicide has a positive charge. USE - Used as wear-resistant corrosion-resistant polypropylene steel-plastic composite pipe. ADVANTAGE - The pipe has excellent wear resistance and corrosion resistance, which is convenient for industrial batch production and market promotion. The method is economical. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for the preparing wear-resistant and corrosion-resistant polypropylene steel-plastic composite pipe, comprising (a) preparing modified molybdenum disilicide, and simultaneously drying the pipeline grade polypropylene resin and compatibilizer, (b) mixing the accurately measured composite filler and the surface modifier uniformly for dry-grinding to obtain the surface-modified composite filler, (c) mixing the accurately measured and dried pipe-grade polypropylene resin, compatibilizer, surface modified composite filler, dispersant, antioxidant, and anti-ultraviolet agent uniformly, extruding and granulating to obtain wear- resistant and corrosion-resistant polypropylene master batch, (d) using the wear- resistant and corrosion-resistant polypropylene master batch to prepare a semi- finished wear-resistant and corrosion-resistant polypropylene composite pipe compounded on the inner wall of the carbon steel pipe, preparing the outer wall of the carbon steel pipe by using conventional polyolefin resin and compounding the outer pipe layer on the outer wall of the carbon steel pipe, placing the semi- finished wear-resistant and corrosion-resistant polypropylene composite pipe in an annular electric field, where the battery field direction of the annular electric field is perpendicular to the central axis of the semi-finished wear-resistant and corrosion-resistant polypropylene composite pipe, heating to Tg+20-Tg+30℃, continuously processing for 30-40 minutes, and cooling to room temperature, and (e) performing laser sintering treatment to make the semi-finished wear-resistant and corrosion-resistant polypropylene composite pipe form a compact passivation silicon dioxide layer inside.