Rebar corrosion resistant coating and coating method therefor

A technology for anti-corrosion coatings and steel bars, which is applied in the direction of anti-corrosion coatings, coatings, and devices for coating liquid on the surface. It can solve the problem of weak adhesion between epoxy resin and concrete, inability to adapt to steel bar anti-corrosion, and double-coating costs. and other problems, to achieve the effect of good bonding performance, strong durability, and good compactness

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
[0009] In summary, the existing anti-corrosion coating technology for steel bars can no longer adapt to the anti-corrosion of steel bars in concrete structures in high-corrosion environments. Therefore, an anti-corrosion coating with low cost, better durability, better anti-corrosion performance and high ductility is sought Layer and its coating method become an urgent need

Method used

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  • Rebar corrosion resistant coating and coating method therefor
  • Rebar corrosion resistant coating and coating method therefor
  • Rebar corrosion resistant coating and coating method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Pretreatment: Take a section of steel bar, use abrasive paper to remove rust, then rinse the surface with 5% dilute sulfuric acid to remove rust, then rinse it with clean water, and dry it for later use.

[0041] Preparation of paint: pass glass powder and clay through 300 mesh sieve respectively, take 54 parts of sieved glass powder and 5 parts of sieved clay, 33 parts of borax, 1.0 part of basalt fiber, 1.0 part of zirconium dioxide, 3.6 parts Fluorspar, 0.9 part of cobalt monoxide, 1.0 part of nickel monoxide and 0.5 part of sodium carbonate are added to the mixing tank and mixed with a stirring rod, and then the mixing tank is placed in the mixer for dry mixing until the mixing The color is uniform, and the mixture is mixed thoroughly to obtain the mixture A. After dry mixing, add to mixture A, wherein the mass ratio of mixture A to water is 2.5:1, stir it until it becomes a slurry, put it into a mixer for 5-7 minutes, and mix thoroughly to obtain coating B , Take ...

Embodiment 2

[0047] Pretreatment: Take a section of steel bar, use abrasive paper to remove rust, then rinse the surface with 5% dilute sulfuric acid to remove rust, then rinse it with clean water, and dry it for later use.

[0048] Preparation of paint: pass glass powder and clay through 400 mesh sieve respectively, take 54 parts of sieved glass powder and 3.8 parts of sieved clay, 32 parts of borax, 1.5 parts of silicon carbide fiber, 1.0 part of zirconium dioxide, 0.7 1 part of cobalt monoxide, 0.8 part of nickel monoxide, 4.5 parts of fluorspar, and 1.7 parts of sodium dihydrogen phosphate are added to the mixing tank and stirred with a stirring bar, and then the mixing tank is placed in a mixer for dry mixing. Mix well until the mixture is uniform in color to obtain mixture A. After dry mixing, add to mixture A, wherein the mass ratio of mixture A to water is 2.5:1, stir it until it becomes a slurry, put it into a mixer for 5-7 minutes, and mix thoroughly to obtain coating B , Take o...

Embodiment 3

[0053] Pretreatment: Take a piece of HRB400 Φ12 steel bar, use sandpaper to remove rust, then rinse the surface with 5% dilute sulfuric acid to remove rust, then rinse with clean water, and dry for later use.

[0054] Preparation of paint: pass glass powder and clay through 300 mesh sieve respectively, take 54 parts of sieved glass powder and 4.6 parts of sieved clay, 29 parts of borax, 2.5 parts of polycrystalline mullite fiber, 3.0 parts of carbon dioxide Zirconium, 0.9 parts of cobalt monoxide, 1.0 parts of nickel monoxide, 2.0 parts of tin oxide, 2.5 parts of molybdenum trioxide, 0.5 parts of sodium hexametaphosphate, add to the mixing tank and stir with a stirring bar, and then put the mixing tank Perform dry mixing in a mixer until the color of the mixture is uniform, and mix thoroughly to obtain mixture A. After dry mixing, add to mixture A, wherein the mass ratio of mixture A to water is 2.7:1, stir it until it becomes a slurry, put it into a mixer for 5-7 minutes, and...

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Abstract

The invention discloses a rebar corrosion resistant coating, and raw material comprises the following components: 45-70 parts of glass powder, 2-8 parts of clay, 26-50 parts of borax, 0.5-3 parts of fiber, 5-15 parts of opacifier, 1-10 parts of adherence agent and 0.25-2.8 parts of electrolyte. The invention further discloses a rebar corrosion resistant coating coating method, comprising the following step of: 1) dry mixing; 2) wet mixing; 3) pre-treating; 4) coating; 5) drying; 6) sintering; and 7) cooling at room temperature. The rebar corrosion resistant coating is high in ductility, high in adhesion performance, high in compactness and excellent in corrosion resistance, the fiber is introduced into the coating so that the corrosion resistant coating, during the breaking process, absorbs energy through mechanisms such as crack deflection, fiber breakage and fiber and removal, so that the coating toughness is improved, the cracking formation is delayed, and the mechanical property of the rebar can be maintained at the same time.

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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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D5/08B05D7/24B05D7/14B05D3/12B05D3/02
Inventor 闫东明刘毅张洛栋高海波
Owner ZHEJIANG UNIV
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