A kind of tough paint and its coating method for steel bar anticorrosion

A coating and steel bar technology, applied in anti-corrosion coatings, coatings, devices for coating liquid on surfaces, etc. problem, to achieve the effect of strong durability, high toughness, and good densification performance

Active Publication Date: 2017-04-05
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. 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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  • A kind of tough paint and its coating method for steel bar anticorrosion
  • A kind of tough paint and its coating method for steel bar anticorrosion
  • A kind of tough paint and its coating method for steel bar anticorrosion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 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.

[0039] Preparation of paint: pass sericite powder through 800 mesh sieve, take 47 parts of 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 Element, wherein the weight ratio of sericite powder and silicon carbide whiskers is 30:1, add in the mixing tank and mix with a stirring bar for 30 seconds, then place the mixing tank in the mixer for 3-5 minutes of dry mixing , mixed well 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 tak...

Embodiment 2

[0044] Pretreatment: with embodiment 1.

[0045] Preparation of paint: Pass the phytomica powder through a 800-mesh sieve, take 52 parts of the sieved phosphomica 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 phosphomica powder and silicon carbide whiskers is 25:1, add in the mixing tank and mix with a stirring bar for 30 seconds, then place the mixing tank in a mixer for dry mixing 3- Mix well to obtain Mixture A for 5 minutes. 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 and no water layer on the sur...

Embodiment 3

[0050] Pretreatment: with embodiment 1.

[0051] Preparation of paint: Pass sericite powder through a 900-mesh sieve, take 52 parts of sieved sericite powder, 35 parts of borax, 0.7 part of silicon carbide whiskers, 3.5 parts of magnesium oxide, 1.4 parts of antimony trioxide, 1.6 parts of wood element, wherein the weight ratio of sericite powder and silicon carbide whiskers is 70:1, add to the mixing tank and mix with a stirring bar for 30 seconds, then place the mixing tank in a mixer for dry mixing for 3-5 minutes , mixed well 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 and no water layer on the surface. Pour Paint B into a ...

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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 in particular relates to a tough paint 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 reinforced concrete stru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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