A kind of solvent-free railway screw spike with rust anti-corrosion coating and preparation method thereof

Abstract

The invention belongs to the technical field of coatings and particularly relates to a solvent-free railway screw spike antirust corrosion-resistant coating and a preparation method thereof. The preparation method includes following steps: (1) successively feeding raw materials into a high-speed dispersing machine for dispersion, wherein the raw materials includes, by mass, 100 parts of epoxy resin, 30-40 parts of glycidyl ether, 0.5-1 part of polyaniline and 1-2 parts of gas-phase white carbon black; (2) successively adding 300-400 parts by mass of aluminium tripolyphosphate, 0.1-1 part by mass of diphenyl guanidine chromate and 3-5 parts by mass of nano calcium carbonate into the dispersed raw materials and performing dispersion continuously to obtain an A component raw mixture; (3) grinding the A component raw mixture on a sand mill and discharging an obtained material; and (4) heating 100 parts by mass of a modified aromatic amine and adding 4-6 parts by mass of salicylic acid, maintaining the temperature and mixing and stirring the mixture for one hour to obtain a B component raw mixture; and (5) mixing the grinded A component raw mixture and the obtained B component raw material mixture with stirring uniformly to obtain a finished product of the coating.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a solvent-free railway spiral spike with rust anticorrosion coating and a preparation method thereof. Background technique [0002] Calcium hydroxide is mostly used as the thickener in the existing antirust grease for rail spikes, and No. 46 mechanical oil is used as the base oil. The newly developed anti-rust grease uses lithium hydroxide as thickener to improve high temperature resistance, uses No. 24 cylinder oil as base oil to enhance adhesion, uses graphite as lubricant, and adds barium petroleum sulfonate to enhance anti-rust ability. [0003] But existing anti-corrosion grease or anti-corrosion paint still can't avoid the following defects: [0004] 1. At present, anti-rust grease is used for the anti-corrosion of railway spiral spikes. The anti-rust effect of this oil is poor and the service life is short. Generally, serious corrosion will occur in three to...

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Problems solved by technology

[0003] But existing anti-corrosion grease or anti-corrosion paint still can't avoid the following defects:

[0004] 1. At present, the anti-corrosion of railway spiral spikes uses anti-rust grease, which has poor anti-rust effect and short service life. Generally, serious corrosion will occur in three to seven days of salt spray test of grease, and the corrosion degree of steel sheet can reach level 5.

The grease can only be applied manually, with high labor intensity and low production efficiency

[0005] 2. When traditional coatings are painted on steel surfaces, they require thorough rust removal, and even require the metal luster to be completely exposed. The labor intensity of rust removal is high, the production efficiency is low, the construction cost is high, and rust dust seriously endangers human health. Less production and maintenance projects are limited to working conditions and it is difficult to carry out thorough derusting, especially for large-scale equipment projects, such as ships, bridges, offshore oil production facilities, heavy machinery, railway spiral spikes, etc.

[0006] 3. Traditional coatings contain thinners or solvents, which are flammable, explosive, toxic, and harmful to the environment and workers' health.

[0007] 4. Traditional coatings have a single anti-rust function

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