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Polyaniline-modified cement-based antirust paint and preparation method and application thereof

An anti-rust coating and polyaniline technology, applied in cement coatings, anti-corrosion coatings, coatings, etc., can solve problems such as affecting the construction performance of coatings and restricting wide application, and achieve the improvement of electrochemical corrosion potential and grip strength. , Improve the effect of delayed liquidity

Inactive Publication Date: 2016-04-20
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, too thick paint slurry will affect the construction performance of the paint, which limits its wide application.

Method used

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  • Polyaniline-modified cement-based antirust paint and preparation method and application thereof
  • Polyaniline-modified cement-based antirust paint and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029]A polyaniline-modified cement-based antirust coating, based on cement quality, each component is composed of: 1kg (100wt%) of ordinary Portland cement of strength grade 52.5, polyaniline 10g (1wt%), RI Steel bar rust inhibitor 30g (3wt%), naphthalene series powder water reducer 5g (0.5wt%), sodium lignosulfonate 2g (0.2wt%), water 400g (40wt%). Prepare according to the preparation method described in the present invention, carry out the viscosity test and the viscosity test after 1h with Tu-4 cup viscometer. Then use a 25mm brush to coat the prepared anti-rust paint on the surface of the steel bar, put the short steel bar in 3.5wt% saline solution for anti-rust experiment after standing for 7 days, and then press the long steel bar with C50 concrete According to the industry standard of strength test (JTJ270-98 "Concrete Test Regulations for Water Transport Engineering"), molds were built, demoulded after 48 hours and cured in a curing room at 20°C and humidity 100% for ...

Embodiment 2

[0031] A polyaniline-modified cement-based antirust coating, raw materials are composed of: 1kg (100wt%) of ordinary portland cement of strength grade 52.5, 20g (2wt%) of polyaniline, 30g (3wt%) of RI steel bar rust inhibitor , 5g (0.5wt%) of naphthalene-based powder water reducer, 2g (0.2wt%) of sodium lignosulfonate, and 400g (40wt%) of water. Prepare according to the preparation method described in the present invention, carry out the viscosity test and the viscosity test after 1h with Tu-4 cup viscometer. Then use a 25mm brush to coat the prepared anti-rust paint on the surface of the steel bar, put the short steel bar in 3.5wt% saline solution for anti-rust experiment after standing for 7 days, and then press the long steel bar with C50 concrete According to the industry standard of strength test (JTJ270-98 "Concrete Test Regulations for Water Transport Engineering"), molds were built, demoulded after 48 hours and cured in a curing room at 20°C and humidity 100% for 28 da...

Embodiment 3

[0033] A polyaniline-modified cement-based antirust paint, raw materials are composed of: 1kg (100wt%) of ordinary portland cement of strength grade 52.5, polyaniline 30g (3wt%), RI steel bar rust inhibitor 30g (3wt%) , 5g (0.5wt%) of naphthalene-based powder water reducer, 2g (0.2wt%) of sodium lignosulfonate, and 400g (40wt%) of water. Prepare according to the preparation method described in the present invention, carry out the viscosity test and the viscosity test after 1h with Tu-4 cup viscometer. Then use a 25mm brush to coat the prepared anti-rust paint on the surface of the steel bar, put the short steel bar in 3.5wt% saline solution for anti-rust experiment after standing for 7 days, and then press the long steel bar with C50 concrete According to the industry standard of strength test (JTJ270-98 "Concrete Test Regulations for Water Transport Engineering"), molds were built, demoulded after 48 hours and cured in a curing room at 20°C and humidity 100% for 28 days, and ...

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Abstract

The invention discloses polyaniline-modified cement-based antirust paint for concrete steel bars and a preparation method and application of the antirust paint. The antirust paint is prepared from 100 wt% of cement, 0.5-3 wt% of polyaniline, 1-3 wt% of a rust inhibitor, 0-15 wt% of an ethylene-vinyl acetate copolymer, 0.5-1 wt% of a water reducing agent, 0-0.22 wt% of retarder and 35-55 wt% of water by taking the cement mass as a criterion. The properties of the cement-based antirust paint are improved by improving the characteristics such as the positive potential of the steel bar surface through the polyaniline. A steel bar coated with the antirust paint is not rusted after being soaked in a 3.5 wt% NaCl solution for 3 months, the bond stress is larger than the bond stress between concrete and a bare steel bar, and the longest working time reaches up to 2 hours.

Description

technical field [0001] The invention belongs to the field of antirust environment-friendly coatings for buildings and metals, and in particular relates to an antirust coating for concrete steel bars, a preparation method and engineering application thereof. Background technique [0002] In the construction of coastal and island reef projects, due to the long construction period of the project, there are multiple construction intervals, resulting in long-term exposure of most of the pre-arranged steel bars and under the influence of salt spray climate, the steel bars are severely corroded and affect the bearing capacity of the steel bars and reinforced concrete structures. durability. If the steel bars in the concrete are corroded, it will seriously affect the strength and durability of the concrete. The reason is that the steel bar corrosion has the following three hazards: 1. Reduce the bearing capacity of the structure and reduce the safety reserve; 2. Reduce the rigidity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/08C09D7/12C09D5/08
CPCC09D1/08C09D5/08C09D7/65
Inventor 焦宝祥柳嘉伟李延波赵景川贾诲金益楠
Owner YANCHENG INST OF TECH
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