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Organic composite reinforced concrete rust inhibitor and preparation method thereof

A reinforced concrete, composite technology, applied in the field of building materials, to achieve excellent rust resistance, improve resistance to chloride ion penetration, and ensure the effect of effective concentration

Active Publication Date: 2012-05-02
CCCC WUHAN HARBOR ENG DESIGN & RES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of organic compound type reinforced concrete rust inhibitor and preparation method thereof, to make up for the defective of existing organic steel bar rust inhibitor

Method used

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  • Organic composite reinforced concrete rust inhibitor and preparation method thereof
  • Organic composite reinforced concrete rust inhibitor and preparation method thereof
  • Organic composite reinforced concrete rust inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 180 grams of ethanolamine, 300 grams of benzoic acid, and 320 grams of water (the molar mass ratio is 1.2:1:7.2), add them into a glass container, heat to 50° C., stir and react for 2 hours to obtain a carboxylic acid alcohol amine salt solution.

[0025] Weigh 500 grams of carboxylic acid alcohol amine salt solution, 65 grams of sodium monofluorophosphate, 4 grams of sodium dodecylbenzenesulfonate and 3 grams of polyether defoamer and dissolve them in 428 grams of water, stir evenly, and obtain an organic composite steel bar Concrete rust inhibitor 1.

Embodiment 2

[0027] Weigh 230 grams of N,N-dimethylethanolamine, 240 grams of benzoic acid, and 313 grams of water (the molar mass ratio is 1.3:1:8.8), add them into a glass container, heat to 60° C., and stir for 2 hours to obtain Carboxylic acid alcohol amine salt solution.

[0028] Weigh 500 grams of carboxylic acid alcohol amine salt solution, 60 grams of sodium monofluorophosphate, 3 grams of sodium dodecylbenzenesulfonate and 2 grams of polyether defoamer and dissolve them in 435 grams of water, stir evenly, and obtain an organic composite steel bar Concrete rust inhibitor 2.

Embodiment 3

[0030] Weigh 220 grams of N,N-dimethylethanolamine, 120 grams of benzoic acid, 130 grams of salicylic acid, and 320 grams of water (the molar mass ratio is 2.5:1:1:18.1), add them to a glass container, and heat to 60°C , Stirred and reacted for 2.5 hours to obtain a carboxylic acid alcohol amine salt solution.

[0031] Take by weighing 590 grams of carboxylic acid alcohol amine salt solution, 60 grams of sodium monofluorophosphate, 3 grams of sodium dodecylbenzenesulfonate and 2 grams of defoaming agent and dissolve them in 345 grams of water, stir evenly, and obtain the organic composite reinforced concrete resistance Rust agent3.

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Abstract

The invention discloses an organic composite reinforced concrete rust inhibitor and a preparation method thereof. According to the invention, the rust inhibitor is prepared from well-mixed materials of, by weight: 30-40% of alcohol amine carboxylate, 5-10% of sodium monofluorophosphate, 0.1-0.5% of an anionic surfactant, and balance of water. The rust inhibitor has a good diffusion performance inconcrete, and can simultaneously acts upon the cathodes and the anodes of steel bars. The trust inhibitor forms stable chelate rings with the steel bars, and has an excellent rust inhibiting performance. Also, the anions in the rust inhibitor can be combined with calcium ions in the concrete, such that precipitates are formed. With the precipitates, capillary pores in the concrete can be obstructed, and the chloride ion penetration resistance of the concrete can be improved.

Description

technical field [0001] The invention belongs to building material technology, and in particular relates to a reinforced concrete rust inhibitor and a preparation method thereof. Background technique [0002] The premature failure of concrete structures caused by steel corrosion has become a major problem in the world today. The main reasons for the corrosion of steel bars are the carbonation of concrete and the corrosion of chloride ions. Under the condition of high alkalinity, a dense oxide film will be formed on the surface of the steel bar, which makes the surface of the steel bar passivated and protected. However, when reinforced concrete is eroded by CO2 in the service environment, the alkalinity in the pore fluid is reduced to a certain extent, or when the concentration of chloride salt on the surface of the steel bar in the concrete is higher than a certain critical value, the passivation film on the surface of the steel bar will be destroyed. Corrosion occurs. Ste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/32C04B24/12
Inventor 张鸿李遵云杨林屠柳青雷宇芳
Owner CCCC WUHAN HARBOR ENG DESIGN & RES
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