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A kind of tough coating for anticorrosion of steel bar and coating method thereof

A steel bar and coating technology, applied in applications, home appliances, and other home appliances, can solve the problems of weak bonding between epoxy resin and concrete, inability to adapt to steel bar corrosion, and doubling the cost of double-coating, etc., to achieve outstanding anti-corrosion Corrosion ability, strong durability, good compactness performance

Active Publication Date: 2017-09-05
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. overriding method becomes an urgent need

Method used

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  • A kind of tough coating for anticorrosion of steel bar and coating method thereof
  • A kind of tough coating for anticorrosion of steel bar and coating method thereof
  • A kind of tough coating for anticorrosion of steel bar and coating method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] 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.

[0040]Preparation of paint: pass orthoclase powder through a 800-mesh sieve, fluorspar through a 500-mesh sieve, take 46 parts of sieved orthoclase powder, 39 parts of borax, 5 parts of sieved fluorspar, 5 parts of clay, and 2.8 parts Cobalt trioxide, 1 part of propylene glycol methyl ether acetate (PMA) and 1.2 parts of methyl cellulose, wherein the weight ratio of borax and feldspar powder is 0.8:1, 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, and mix thoroughly to obtain mixture A. After dry mixing, add 50 parts of water to mixture A, wherein the weight ratio of mixture A to water is 2:1, stir it until it becomes a slurry, put it into a mixer for wet mixing for 5-7 minutes,...

Embodiment 2

[0045] Pretreatment: with embodiment 1.

[0046] Preparation of paint: pass sanitite powder through a 900-mesh sieve, fluorspar through a 625-mesh sieve, take 56 parts of sieved sanidine powder, 27 parts of borax, 7 parts of sieved fluorspar, 6 parts of clay, and 1.5 parts Manganese dioxide, 1.2 parts of PMA and 1.3 parts of sodium hydroxymethyl cellulose, wherein the weight ratio of borax to sanidine powder is 0.5:1, are added in the mixing tank and stirred for 30 seconds with a stirring bar, and then the mixing tank is placed Carry out dry mixing in a mixer for 3-5 minutes, and mix thoroughly to obtain mixture A. After dry mixing, add 50 parts of water to mixture A, wherein the weight ratio of mixture A to water is 2:1, 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 delam...

Embodiment 3

[0051] Pretreatment: with embodiment 1.

[0052] Preparation of paint: pass orthoclase powder through 800 mesh sieve, fluorspar through 800 mesh sieve, take 50.5 parts of sieved orthoclase powder, 25 parts of borax, 9.5 parts of sieved fluorspar, 5.5 parts of clay, 6.7 parts Cobalt trioxide, 1.6 parts of PMA and 1.2 parts of methylcellulose, wherein the weight ratio of borax and feldspar powder is 0.5:1, add in the mixing tank and stir for 30 seconds with a stirring bar, then place the mixing tank in the mixing tank Carry out dry mixing in a feeder for 3-5 minutes, and mix thoroughly to obtain mixture A. After dry mixing, add 40 parts of water to mixture A, wherein the weight ratio of mixture A to water is 2.5:1, 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 minutes. It was observed that the paint B had no delamination a...

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Abstract

The invention discloses a tenacity coating used for corrosion prevention of a reinforcing steel bar and a coating method thereof. The tenacity coating used for corrosion prevention of the reinforcing steel bar is prepared from the following raw material components: 45-70 parts of feldspar powder, 25-50 parts of borax, 5-15 parts of fluorite, 4-8 parts of clay, 1.0-10 parts of adherence promoters, 1-2 parts of a pore-forming agent and 1.0-1.5 parts of a thickening agent. The invention also discloses a coating method of the tenacity coating used for corrosion prevention of the reinforcing steel bar. The coating method of the tenacity coating used for corrosion prevention of the reinforcing steel bar comprises the following steps: 1) carrying out dry mixing; 2) carrying out wet mixing; 3) carrying out pretreatment; 4) coating; 5) baking; 6) sintering; and 7) cooling at normal temperature. The tenacity coating used for corrosion prevention of the reinforcing steel bar has outstanding corrosion resistance, extremely high tenacity and relatively high self-durability.

Description

technical field [0001] The invention belongs to the field of metal materials used in concrete structures, and in particular relates to a tough coating 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 reinforced concrete structur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/06C04B35/19
CPCC04B38/06C04B35/19C04B38/0087
Inventor 闫东明刘毅张洛栋高海波
Owner ZHEJIANG UNIV
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