Small-aperture inorganic coating layer used for steel bar anticorrosion, and coating method thereof

An inorganic coating and small pore size technology, applied in the field of metal materials, can solve the problems of weak adhesion between epoxy resin and concrete, double the cost of double coating, and increase the brittleness of the coating, and achieve outstanding corrosion resistance. Effects of improved corrosion performance and reduced pore size

Active Publication Date: 2016-08-03
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 used for the repair of concrete damage, but there is a problem that the phosphate binder is easy to crack when it is under tension.
[0008] Organic materials are used to coat steel bars for anti-corrosion protection. Since the main components are organic substances, the coating will age over time in the seaside environment exposed to wind, water, and sun; inorganic materials are used to coat steel bars for anti-corrosion protection, and the coating is from The composition overcomes the shortcomings of organic coatings aging over time, but the brittleness of the coating is greatly increased, which limits its application in construction steel bars

Method used

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  • Small-aperture inorganic coating layer used for steel bar anticorrosion, and coating method thereof
  • Small-aperture inorganic coating layer used for steel bar anticorrosion, and coating method thereof
  • Small-aperture inorganic coating layer used for steel bar anticorrosion, and coating method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 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.

[0033] Preparation of paint: pass glass powder through a 400-mesh sieve, take 50 parts of sieved glass powder, 35 parts of borax, 10 parts of trimanganese tetraoxide, 4 parts of nano-alumina and 1 part of sodium oxalate, wherein borax and glass The weight ratio of the powder is 0.7:1, put into the mixing tank and mix with a stirring bar for 30 seconds, then put the mixing tank in the mixer for 3-5 minutes of dry mixing, and mix thoroughly to obtain the mixture A. After dry mixing, add 20 parts of water to mixture A, wherein the mass ratio of mixture A to water is 5:1, stir it until it becomes a slurry, put it into a mixer for wet mixing for 5-7 minutes, and mix thoroughly The paint B was obtained, and the paint B was taken out and placed in a container to stand for 10...

Embodiment 2

[0038] Pretreatment: with embodiment 1.

[0039]Preparation of paint: Pass glass powder through a 500-mesh sieve, take 45 parts of sieved glass powder, 32 parts of borax, 9 parts of nano-alumina, 11 parts of trimanganese tetraoxide and 3 parts of ammonium oxalate, of which borax and glass The weight ratio of the powder is 0.72:1, put into the mixing tank and mix with a stirring bar for 30 seconds, then put the mixing tank in the mixer for 3-5 minutes of dry mixing, and mix thoroughly to obtain the mixture A. After dry mixing, add 25 parts of water to mixture A, wherein the mass ratio of mixture A to water is 4:1, stir it until it becomes a slurry, put it into a mixer for wet mixing for 5-7 minutes, and mix thoroughly The paint B was obtained, and the paint B was taken out and placed in a container to stand for 10 minutes. It was observed that the paint B had no delamination and no water layer on the surface. Pour Paint B into a storage tank and set aside.

[0040] Coating: w...

Embodiment 3

[0044] Pretreatment: with embodiment 1.

[0045] Preparation of paint: pass glass powder through a 300-mesh sieve, take 55 parts of sieved glass powder, 36 parts of borax, 5 parts of trimanganese tetraoxide, 2 parts of nano-alumina, 1 part of sodium oxalate and 1 part of ammonium oxalate , wherein the weight ratio of borax to glass powder is 0.65:1, add in the mixing tank and stir with a stirring bar for 30 seconds, then place the mixing tank in a mixer for dry mixing for 3-5 minutes, fully mix to obtain Mixture A. After dry mixing, add 17 parts of water to mixture A, wherein the mass ratio of mixture A to water is 6:1, stir it until it becomes a slurry, put it into a mixer for wet mixing for 5-7 minutes, and mix thoroughly The paint B was obtained, and the paint B was taken out and placed in a container to stand for 10 minutes. It was observed that the paint B had no delamination and no water layer on the surface. Pour Paint B into a storage tank and set aside.

[0046] Co...

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PUM

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Abstract

The invention discloses a small-aperture inorganic coating layer used for steel bar anticorrosion. Raw materials of the coating layer comprise 40-60 parts of glass powder, 30-50 parts of a flux, 4-15 parts of trimanganese tetroxide, 1-10 parts of nano-alumina and 1-5 parts of a ceramic water reducer. The invention also discloses a coating method of the small-aperture inorganic coating layer used for steel bar anticorrosion. The method comprises the steps of 1) dry mixing; 2) wet mixing; 3) preprocessing; 4) coating; 5) baking; 6) sintering; and 7) normal temperature cooling. The inorganic coating layer has the advantages of simple technology, high strength, small apertures, good compactness, good anticorrosion performance and high toughness.

Description

technical field [0001] The invention belongs to the field of metal materials used for concrete structures, and in particular relates to a small-aperture inorganic coating used for steel bar anticorrosion 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 rei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C8/14
CPCC03C8/14
Inventor 闫东明刘毅张洛栋高海波
Owner ZHEJIANG UNIV
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