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Composite reinforced concrete corrosion-inhibiting agent and preparation method thereof

A technology of reinforced concrete and rust inhibitor, which is applied in the field of building materials, can solve the problems that the efficiency is not as obvious as that of the anode type, achieve good migration and diffusion performance, accelerate industry adjustment, and simple production process

Inactive Publication Date: 2012-01-18
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this type of substance is not dangerous, when it acts alone, its effectiveness is not as obvious as that of the anodic type

Method used

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  • Composite reinforced concrete corrosion-inhibiting agent and preparation method thereof
  • Composite reinforced concrete corrosion-inhibiting agent and preparation method thereof
  • Composite reinforced concrete corrosion-inhibiting agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take by weighing 2.5g zinc gluconate, 12.5g benzoic acid, 15.0g N-methyl monoethanolamine and 16.5g water, first benzoic acid is poured in the beaker, add zinc gluconate and N-methyl monoethanolamine, then at room temperature Slowly add water into the beaker while stirring continuously to prevent the reaction from being too violent. After adding water, continue stirring until the solution is clear, and cool the clear solution to room temperature.

[0025] Weigh 3.5 g of potassium monofluorophosphate, add it into the prepared clear solution, and stir until the potassium monofluorophosphate is completely dissolved to obtain a reinforced concrete rust inhibitor, marked as rust inhibitor 1.

Embodiment 2

[0027] Weigh 3.5g zinc gluconate, 15.0g phosphoric acid, 12.5g triethanolamine and 15.0g water respectively, first pour phosphoric acid into a beaker, add zinc gluconate and triethanolamine, then slowly add water into the beaker at room temperature, while continuously Stir to prevent the reaction from being too violent, continue to stir until the solution is clear after adding water, and cool the clear solution to room temperature.

[0028] Weigh 5g of potassium monofluorophosphate, add it to the clear solution just prepared, and stir until the potassium monofluorophosphate is completely dissolved to obtain a reinforced concrete rust inhibitor, marked as rust inhibitor 2.

Embodiment 3

[0030] Take by weighing 1.5g zinc gluconate, 17.5g benzoic acid, 10g triethanolamine and 19.5g water, first benzoic acid is poured in the beaker, add zinc gluconate and triethanolamine, then water is slowly added in the beaker at normal temperature, simultaneously Stir continuously to prevent the reaction from being too violent. After adding water, continue to stir until the solution is clear, and cool the clear solution to room temperature.

[0031] Weigh 1.5 g of potassium monofluorophosphate, add it into the prepared clear solution, and stir until the potassium monofluorophosphate is completely dissolved to obtain a reinforced concrete rust inhibitor, marked as rust inhibitor 3.

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Abstract

The invention discloses a composite reinforced concrete corrosion-inhibiting agent and a preparation method thereof. The corrosion-inhibiting agent is prepared from the following raw materials in percentage by mass: 3-12% of potassium monofluorophosphate, 15-35% of acid, 3-9% of zinc gluconate, 20-40% of low-molecular-weight alcohol amine and the balance of water. The preparation method comprises the following steps of: firstly mixing acid, zinc gluconate, low-molecular-weight alcohol amine and water; then stirring until the solution is clear; cooling to room temperature, and then adding potassium monofluorophosphate; and stirring until potassium monofluorophosphate is fully dissolved to obtain the composite reinforced concrete corrosion-inhibiting agent. The preparation method of the corrosion-inhibiting agent has easily available raw materials and is simple; by using the corrosion-inhibiting agent to prepare sea sand reinforced concrete, the obtained reinforced concrete has good corrosion resistance and certain enhancing effect on delayed coagulation; and aiming at the circumstances of the gradual increase of sea sand use amount and severe corrosion of concrete reinforcement bars, the composite corrosion-inhibiting agent has excellent application prospects.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a composite rust inhibitor for reinforced concrete and a preparation method thereof. Background technique [0002] The durability of reinforced concrete engineering has become a major issue in the field of building materials today, and the corrosion of steel bars is the most important factor affecting durability. Corrosion of steel bars caused by conditions of use (industrial production, marine environment, etc.), environmental acidification (frequent acid rain, increased CO2 concentration, etc.), methods of use (removal of ice salt in winter), etc. has become a common phenomenon in concrete structures, thereby reducing the structure. durability, eventually leading to structural failure. Relevant data reports that about 21.4% of the reinforced concrete structure damage in Japan is caused by steel corrosion; the corrosion loss in the United States is as high as 40% rel...

Claims

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Application Information

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IPC IPC(8): C04B24/12C04B103/61
Inventor 欧阳东
Owner JINAN UNIVERSITY
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