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Anticorrosion coating for buried pipeline and preparation method of anticorrosion coating

A technology for buried pipelines and anti-corrosion coatings, applied in anti-corrosion coatings, asphalt coatings, epoxy resin coatings, etc., can solve the problems of complex process, slow progress, asphalt contamination of soil, etc., and achieve the effect of excellent adhesion

Inactive Publication Date: 2014-12-17
JIANGSU MARINE VICTORY COATING
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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 slow, and the structure and humidity of the soil have a great influence on the flow of oxygen. , the main corrosion factors are soil conductivity, air permeability (porosity), salt content, bacteria in the soil, and stray current. At present, the anticorrosion of existing buried metals is mainly based on epoxy coal tar pitch. However, ordinary coal tar pitch also has the problem of bitumen polluting the soil

Method used

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  • Anticorrosion coating for buried pipeline and preparation method of anticorrosion coating
  • Anticorrosion coating for buried pipeline and preparation method of anticorrosion coating
  • Anticorrosion coating for buried pipeline and preparation method of anticorrosion coating

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Embodiment 1

[0037] This embodiment provides a method for preparing a coating for anticorrosion of buried pipelines, including the following specific steps:

[0038] Step 1: be 25% epoxy resin, 5% auxiliary agent, 5% 70# paraffin wax, 5% curing agent, 3% zinc phosphate, 2% strontium sulfate, 5% hexadecimal Sodium phosphate and 5% sodium pyrophosphate were mixed and stirred at a stirring speed of 250 rpm, and stirred for 35 minutes to obtain a uniform and transparent mixture;

[0039] Step 2: In the stirring state, add 10% by weight talcum powder to the mixture, adjust the rotation speed to 550 rpm, control the cylinder temperature to ≤45°C, and stir for 35 minutes;

[0040] Step 3: Add 35% by weight of modified asphalt liquid, adjust the rotation speed to 750 rpm, stir for 1 hour, check the viscosity≧90s, solid content≧70%, and obtain the finished product.

[0041] Effect of use: Make 5 test panels with the above formula, one of which is tested for mechanical properties, and the rest for ...

Embodiment 2

[0045] This embodiment provides a method for preparing a coating for anticorrosion of buried pipelines, including the following specific steps:

[0046] Step one: be 25% epoxy resin, 1% auxiliary agent, 5% 70# paraffin, 13% curing agent, 1% zinc phosphate, 2% strontium sulfate, 3% sodium hexametaphosphate by weight Mix and stir with 5% sodium pyrophosphate, the stirring speed is 350 rpm, and stir for 25 minutes to obtain a uniform and transparent mixture;

[0047] Step 2: In the stirring state, add 10% by weight talcum powder to the mixture, adjust the rotation speed to 650 rpm, control the cylinder temperature to ≤45°C, and stir for 25 minutes;

[0048] Step 3: Add 35% modified asphalt liquid in parts by weight, adjust the rotation speed to 850 rpm, stir for 1 hour, check the viscosity≧90s, solid content≧70%, and obtain the finished product. .

[0049] Effect of use: Make 5 test panels with the above formula, one of which is used for mechanical performance test, and the res...

Embodiment 3

[0053] This embodiment provides a method for preparing a coating for anticorrosion of buried pipelines, including the following specific steps:

[0054] Step one: be 27% epoxy resin, 1% auxiliary agent, 5% 70# paraffin, 5% curing agent, 3% zinc phosphate, 2% strontium sulfate, 4% sodium hexametaphosphate by weight Mix and stir with 8% sodium pyrophosphate, the stirring speed is 300 rpm, and stir for 30 minutes to obtain a uniform and transparent mixture;

[0055] Step 2: In the stirring state, add 10% by weight talcum powder to the mixture, adjust the rotation speed to 600 rpm, control the cylinder temperature to ≤45°C, and stir for 30 minutes;

[0056] Step 3: Add 35% modified asphalt liquid in parts by weight, adjust the rotation speed to 800 rpm, stir for 1 hour, check the viscosity≧90s, solid content≧70%, and obtain the finished product.

[0057] Effect of use: Make 5 test panels with the above formula, one of which is used for mechanical performance test, and the rest is u...

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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...

Claims

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Application Information

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IPC IPC(8): C09D195/00C09D163/00C09D5/08
Inventor 郑化陈廷生刘小林
Owner JIANGSU MARINE VICTORY COATING
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