Steel pipeline anticorrosive material and preparation method of steel pipeline anticorrosive material

Abstract

The invention discloses a steel pipeline anticorrosive material and a preparation method of the steel pipeline anticorrosive material. The steel pipeline anticorrosive material comprises the following ingredients in proportion by weight: 44 to 54 parts of polypropylene, 3 to 12 parts of high-density polyethylene powder, 0.3 to 2.4 parts of anti-aging agents, 0.06 to 1.2 parts of antioxidant, 0.06 to 1.2 parts of lubricating agents, 0.06 to 0.6 parts of degradation inhibitors and 0.06 to 0.6 parts of initiators, wherein all ingredients are uniformly mixed in a highly mixed pot and are then extruded out through a reactive double-screw-rod extruding machine with the length-diameter ratio being 52:1, the extruded ingredients are subjected to strip pulling, air cooling and grain cutting, the temperature is set to be 180 DEG C to 220 DEG C, and the rotation speed of screw rods is set to be 180 to 400 turns per minute. Compared with the anticorrosive material in the market, the steel pipeline anticorrosive material has the advantages that the processing applicability is wide, high Vicat, high hardness and good low-temperature toughness are realized, and long service life at high temperature and requirements on the anticorrosive material when passing through specific districts such as water, sand and stone soil and oceans are met.

Description

technical field [0001] The invention relates to an anticorrosion material, in particular to an anticorrosion material for oil and gas field pipelines and a preparation method of the material. Background technique [0002] At present, my country's oil and gas field pipeline anticorrosion mainly adopts three-layer structure polyethylene anticorrosion, but it is used in high temperature medium pipeline anticorrosion, pipeline anticorrosion near pressurization stations, pipeline anticorrosion underground, high surface temperature, and desert areas with long sunshine hours The pipeline anti-corrosion is not satisfied by the current three-layer structure polyethylene anti-corrosion. Polypropylene has a long service life at high temperature. It can run naked at 80°C for 30 years and can withstand a high temperature of 100°C, while polyethylene softens when it exceeds 80°C and loses its use value; polypropylene has a high Vicat The softening point is above -145°C, and the surface sc...

AI Technical Summary

Problems solved by technology

[0003] Patent CN101717544 proposes a black polypropylene anticorrosion material. The patent uses polypropylene with a large molecular weight and general polypropylene as the base material to ensure the mechanical properties of the product, especially the black polypropylene anticorrosion material with high Vicat and high hardness. The patent has the following defects: the base material of the patented product is hard to find, the general high molecular weight polypropylene is not easy to purchase in the market, and the diversity of the second patented product is not enough. At present, the coated products are black and white, and the white color is more common with 3PE. The difference between black products; third, because all polypropylene is used as the base material, the low-temperature toughness of the products is not good, and there is insufficient use in places with large temperature differences between day and night