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Tenacity coating for preventing steel bars from being corroded and coating method of tenacity coating

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

Active Publication Date: 2016-01-13
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
[0010] 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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  • Tenacity coating for preventing steel bars from being corroded and coating method of tenacity coating
  • Tenacity coating for preventing steel bars from being corroded and coating method of tenacity coating
  • Tenacity coating for preventing steel bars from being corroded and coating method of tenacity coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Pretreatment: Take a section of 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.

[0039] Preparation of paint: Pass the sericite powder through a 800 mesh sieve, and take 47 parts of the sieved sericite powder, 40 parts of borax, 1.5 parts of silicon carbide whiskers, 5.3 parts of magnesium oxide, 5 parts of nickel trioxide, 1.2 parts of wood The weight ratio of sericite powder to silicon carbide whisker is 30:1, add it to the mixing tank and mix with a stirring rod for 30 seconds, then place the mixing tank in the mixer for dry mixing for 3-5 minutes , Mix well to obtain Mixture A. After the dry mixing is completed, add 40 parts of water to the mixture A, where the weight ratio of the mixture A to the water is 2.5:1, stir it until it becomes a slurry, put it in the mixer for wet mixing for 5-7 minutes, and mix thoroughly The paint B is obtained, and the pai...

Embodiment 2

[0044] Pretreatment: the same as in Example 1.

[0045] Preparation of paint: Pass the lepidolite powder through a 800 mesh sieve, and take 52 parts of the sieved lepidolite powder, 35 parts of borax, 2.3 parts of silicon carbide whiskers, 7.7 parts of magnesium oxide, 2.5 parts of barium molybdate, and 0.5 parts of lignin Sodium sulfonate, wherein the weight ratio of lepidolite powder to silicon carbide whisker is 25:1, add it to the mixing tank and mix with a stirring rod for 30 seconds, and then place the mixing tank in the mixer for dry mixing 3- Mix well for 5 minutes to obtain Mixture A. After the dry mixing is completed, add 40 parts of water to the mixture A, where the weight ratio of the mixture A to the water is 2.5:1, stir it until it becomes a slurry, put it in the mixer for wet mixing for 5-7 minutes, and mix thoroughly The paint B is obtained, and the paint B is taken out and placed in a container for 10 minutes, and no delamination and no water layer on the surfac...

Embodiment 3

[0050] Pretreatment: the same as in Example 1.

[0051] Preparation of paint: Pass the sericite powder through a 900 mesh sieve, and take 52 parts of the sieved sericite powder, 35 parts of borax, 0.7 parts of silicon carbide whiskers, 3.5 parts of magnesium oxide, 1.4 parts of antimony trioxide, 1.6 parts of wood The weight ratio of sericite powder to silicon carbide whisker is 70:1, add it to the mixing tank and mix with a stirring rod for 30 seconds, then place the mixing tank in the mixer for dry mixing for 3-5 minutes , Mix well to obtain Mixture A. After the dry mixing is completed, add 40 parts of water to the mixture A, where the weight ratio of the mixture A to the water is 2.5:1, stir it until it becomes a slurry, put it in the mixer for wet mixing for 5-7 minutes, and mix thoroughly The paint B is obtained, and the paint B is taken out and placed in a container for 10 minutes, and no delamination and no water layer on the surface of the paint B are observed. Pour pai...

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Abstract

The invention discloses a tenacity coating for preventing steel bars from being corroded. The tenacity coating is prepared from 45-70 parts of mica powder, 25-50 parts of borax, 0.5-3 parts of silicon carbide whisker, 3-12 parts of magnesium oxide, 1.0-10 parts of adhesive agents and 0.25-1.8 parts of thickening agents. The invention further discloses a coating method of the tenacity coating. The coating method includes the following steps of 1, dry mixing, 2, wet mixing, 3, preprocessing, 4, coating, 5, drying, 6, sintering and 7, room-temperature cooling. The tenacity coating is simple in process, high in strength, good in dense performance, good in anticorrosion performance, high in tenacity and high in coating ductility, the silicon carbide whisker is introduced into the coating, so that in the breakage process of the anticorrosive coating, energy is absorbed through crack deflection, fiber breakage, fiber pull-out and the like, the tenacity of the coating is increased, and formation of cracking is delayed.

Description

Technical field [0001] The invention belongs to the field of metal materials used for concrete structures, and particularly relates to a tough coating used for steel anticorrosion and a coating method thereof. Background technique [0002] In the 21st century, my country has entered an era of great coastal economic development. It can be foreseen that a large number of seaports, bridges, tunnels, and offshore oil production platforms will use reinforced concrete structures in the future. The 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 in-depth research on steel corrosion and protection mechanism in reinforced concrete structures, steel coating technology has developed rapidl...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D5/08C09D7/12B05D7/14B05D3/00B05D3/02
Inventor 闫东明刘毅张洛栋高海波
Owner ZHEJIANG UNIV
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