Anticorrosive coating material for reinforcing steel bars and coating method therefor

A technology for anti-corrosion coatings and steel bars, applied in anti-corrosion coatings, coatings and other directions, can solve the problems of weak adhesion between epoxy resin and concrete, inability to adapt to steel anti-corrosion, double the cost of double coatings, etc. Maintain good mechanical properties and densification performance

Active Publication Date: 2015-12-09
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there are still the following problems: 1. The adhesion between the epoxy resin of the outer layer and the concrete is still weak; 2. In order to ensure the bonding of the double-coating interface, sophisticated technical equipment support is required; 3. The double-coating is used Double the cost, poor economy
But its essence is a binder, which can be us

Method used

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  • Anticorrosive coating material for reinforcing steel bars and coating method therefor
  • Anticorrosive coating material for reinforcing steel bars and coating method therefor
  • Anticorrosive coating material for reinforcing steel bars and coating method therefor

Examples

Experimental program
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Example Embodiment

[0031] Example 1

[0032] Pretreatment: Take a section of HRB335, HRB400 or HPB300 grade steel bar, use frosted paper to remove rust, then rinse the surface with 5% dilute sulfuric acid to remove rust, then rinse it with water and dry it for later use.

[0033] Preparation of paint: pass the glass powder through a 300-mesh sieve, take 42 parts of sieved glass powder, 3.9 parts of clay, 23.2 parts of borax, 3.2 parts of zirconium dioxide, 0.7 parts of cobalt oxide, 0.8 parts of nickel monoxide, 3.5 parts Fluorspar and 0.4 parts of sodium carbonate are added to the mixing tank and mixed with a stirring rod for 30 seconds, and then the mixing tank is placed in the mixing machine for dry mixing for 3-5 minutes, and mixed thoroughly to obtain a mixture A. After the dry mixing is completed, add 22.3 parts of water to the mixture A, where the mass ratio of the mixture A to the water is 2.5:1, stir it until it becomes a slurry, put it into the mixer for wet mixing for 5-7 minutes, and mix ...

Example Embodiment

[0038] Example 2

[0039] Pretreatment: Take a section of HRB335, HRB400 or HPB300 grade steel bar, use frosted paper to remove rust, then rinse the surface with 5% dilute sulfuric acid to remove rust, then rinse it with water and dry it for later use.

[0040] Preparation of paint: pass the glass powder through a 300-mesh sieve, take 38.8 parts of the sieved glass powder, 3.9 parts of clay, 26.4 parts of borax, 3.1 parts of zirconium dioxide, 0.7 parts of cobalt oxide, 0.8 parts of nickel monoxide, and 2.2 parts Fluorspar, 1.3 parts of barium oxide, 0.3 parts of sodium lignosulfonate, add them to the mixing tank and mix with a stir bar for 30 seconds, then place the mixing tank in the mixer for dry mixing for 3-5 minutes, and mix thoroughly A mixture A is obtained. After the dry mixing is completed, add 22.5 parts of water to the mixture A, where the mass ratio of the mixture A to the water is 2.5:1, stir it until it becomes a slurry, put it into the mixer for wet mixing for 5-7 ...

Example Embodiment

[0044] Example 3

[0045] Pretreatment: Take a section of HRB335, HRB400 or HPB300 grade steel bar, use frosted paper to remove rust, then rinse the surface with 5% dilute sulfuric acid to remove rust, then rinse it with water and dry it for later use.

[0046] Preparation of paint: pass the glass powder through a 300-mesh sieve, take 43 parts of sieved glass powder, 3.8 parts of clay, 23.3 parts of borax, 2.3 parts of zirconium dioxide, 2.4 parts of tin oxide, 0.7 parts of cobalt oxide, 0.8 parts of one Nickel oxide, 0.8 parts of antimony trioxide, 1.1 parts of molybdenum trioxide, 0.3 parts of sodium tripolyphosphate are added to the mixing tank and mixed with a stirring rod for 30 seconds, and then the mixing tank is placed in the mixer for dry mixing Mix well for 3-5 minutes to obtain Mixture A. After the dry mixing is completed, add 21.5 parts of water to the mixture A, where the mass ratio of the mixture A to the water is 3:1, stir it until it becomes a slurry, put it into t...

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Abstract

The invention discloses an anticorrosive coating material for reinforcing steel bars. The anticorrosive coating material contains the following ingredients in parts by weight: 31-43 parts of glass powder, 1.3-4.1 parts of clay, 23-35 parts of borax, 2.7-7.4 parts of opacifier, 1.3-3.5 parts of adhesion agent and 0.2-2.4 parts of electrolyte, wherein the glass powder is sieved with a sieve with the pore size of 300-500 meshes. A coating method for the anticorrosive coating material for the reinforcing steel bars is further disclosed and comprises the following steps: (1) carrying out dry mixing; (2) carrying out wet mixing; (3) carrying out pretreatment; (4) carrying out coating; (5) carrying out baking; (6) carrying out sintering; and (7) carrying out normal-temperature cooling. The anticorrosive coating material is high in strength, good in compactness and good in corrosion resistance and has a strong bonding force with concrete, and meanwhile, the mechanical properties of the reinforcing steel bars are maintained.

Description

technical field [0001] The invention belongs to the field of metal materials used in concrete structures, and in particular relates to a reinforcement anticorrosion paint and a coating method thereof. Background technique [0002] Entering the 21st century, my country has entered the era of great coastal economic development. It is foreseeable that a large number of seaport terminals, cross-sea bridges, tunnels, offshore oil production platforms, etc. will use reinforced concrete structures in the future. Corrosion of steel bars in concrete structures has become a major factor affecting the durability of reinforced concrete. Therefore, using new materials and new technologies to solve the problem of steel corrosion is one of the most urgent tasks faced by scientific and technological workers in the field of civil engineering. [0003] With the continuous deepening of the research on the corrosion and protection mechanism of steel bars in reinforced concrete structures, the ...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D5/08C09D7/12
Inventor 闫东明刘毅张洛栋高海波
Owner ZHEJIANG UNIV
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