A kind of reinforced concrete rust inhibitor and preparation method thereof

Abstract

The invention provides a reinforced concrete anti-corrosive agent and a preparation method thereof. The preparation method comprises the following steps of: S1: dissolving monomer ionic liquid 1-vinyl-2-methyl-3-ethanamine-imidazolium cation amino acid anion salt into a first organic solvent to prepare solution with mass fraction of 5 to 20%, and after heating and warming with stirring to a temperature of 70 to 85 DEG C under the condition of 1,000 to 2,000 r / min, stabilizing for 5 to 10min and adding an initiator to form mixed solution; S2: dropwise adding divinyl benzene into the mixed solution obtained in the step S1, and after performing the reaction for 6 to 24h, stopping to obtain reaction liquid; S3: after cooling the reaction liquid obtained in the step S2 to the room temperature of 25 DEG C, carrying out vacuum filtration, placing a filter cake into a drying box to dry for 6 to 24h under the condition of 50 to 80 DEG C, and grinding the dried filter cake to obtain the anti-corrosive agent. The reinforced concrete anti-corrosive agent and the preparation method thereof, compared with the prior art, are simple and convenient in preparation process and easy in obtaining raw materials; the prepared anti-corrosive agent belongs to a high polymer material and is stable in property, green, environment-friendly and excellent in corrosion inhibition and anti-corrosion performance.

Description

technical field [0001] The invention relates to the field of reinforced concrete antirust technology, in particular to a reinforced concrete antirust agent and a preparation method thereof. Background technique [0002] The invention of reinforced concrete marks the beginning of a new era in the history of human architecture. Reinforced concrete structures have many advantages such as easy local materials, high compressive and flexural strength, good volume stability, easy construction, and good durability. It has become the most common and widely used structural form in construction engineering. However, the corrosion of steel bars in reinforced concrete leads to premature failure of reinforced concrete structures, which has become an important factor affecting the durability of reinforced concrete structures. In actual use, environmental effects such as steel bar corrosion, concrete carbonation, and alkali-aggregate reaction will cause structural damage and cracks in rein...

AI Technical Summary

Problems solved by technology

For example, in the Chinese patent application whose application number is CN201010185725.4, a composite reinforced concrete rust inhibitor is introduced, the main components of which are calcium nitrite, sodium benzoate, sodium hexametaphosphate, zinc oxide and pozzolan, etc. The rust inhibitor can effectively slow down the corrosion of steel bars in reinforced concrete, and can prevent or delay the damage of chloride ions to the passivation film of steel bars. However, nitrite and phosphate mostly affect the setting time, early strength and later strength of concrete. All have negative effects in varying degrees, and calcium nitrite pollutes the environment, which is harmful to human health; and for example, in the application number CN201010517142.7 Chinese patent application, a kind of concrete reinforcement rust inhibitor and preparation method thereof are introduced, by two The gas-phase corrosion inhibitor is prepared by reaction of polycarboxylic acid and organic amine, and on this basis, sodium monofluorophosphate, calcium gluconate, etc. are added to prepare concrete steel bar rust inhibitor. The rust inhibitor of the invention has excellent corrosion and rust inhibition performance, Good environmental protection and other advantages, but although the amino alcohol corrosion inhibitor can prevent harmful ions from entering the surface of the rebar to a certain extent, it is not enough to protect the rebar itself

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