Anticorrosion coating for buried pipeline and preparation method of anticorrosion coating

Abstract

The invention discloses an anticorrosion coating for a buried pipeline. The anticorrosion coating is prepared from the following components in percentage by weight: 25-40 percent of epoxy resin, 35-45 percent of modified liquid asphalt, 5-10 percent of a flame retardant, 10 percent of talc, 1-5 percent of an auxiliary, 5-15 percent of a curing agent, 1-3 percent of zinc phosphate, 2-4 percent of strontium phosphate, 3-5 percent of sodium hexametaphosphate and 5-8 percent of sodium pyrophosphate. The invention also discloses a preparation method of the anticorrosion coating for the buried pipeline. The anticorrosion coating can be constructed by adopting a spraying process, a brushing coating process and a roll coating process and has the advantages of excellent gumminess, chemical corrosion, abrasion and permeability resistance, fast dry and flame retardancy. With the application of the anticorrosion coating, the original functions can be greatly strengthened, unnecessary anticorrosion materials are prevented from being applied again, the comprehensive cost of the anticorrosion engineering is lowered, and the use is convenient.

Description

technical field

[0001] The invention belongs to the field of chemical coatings, and relates to an anti-corrosion coating, in particular to an anti-corrosion coating for buried pipelines and a preparation method thereof. Background technique

[0002] With the gradual deepening of the country's modern construction, underground metal structures have increased rapidly, such as gas pipelines for west-to-east gas transmission, oil pipelines for north-to-south oil transfer, cables, underground water pipes and sewage pipes, etc. Due to the corrosion of soil, oil, gas, and water seepage are caused, resulting in losses or accidents. Therefore, it is of great significance to study soil corrosion. Soil corrosion is the corrosion of metals in soil. Soil is a special solid electrolyte with capillary porosity. The cathodic process of soil corrosion is mainly oxygen depolarization. Since oxygen reaches the cathode through the solid microporous electrolyte, the process is complicated and s...

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