Migration-type organic reinforced concrete anti-corrosion admixture

Abstract

The invention relates to a migration-type organic reinforced concrete anti-corrosion admixture which is prepared by mixing organic carboxylic acid and organic amine in the following percentage by weight: 40-80% of the organic carboxylic acid and 20-60% of the organic amine; adding the mixture into water; heating to 60-70 DEG C; and stirring the mixture for reaction for 1-2 hours to obtain the migration-type organic reinforced concrete anti-corrosion admixture. The anti-corrosion admixture does not contain nitrite and inorganic base and can prevent damage on reinforcing steel bar passive films caused by chloride ions, thus preventing corrosion.

Description

technical field

[0001] The invention relates to a migratory organic reinforced concrete rust inhibitor, which belongs to the technical field of concrete admixtures. Background technique

[0002] Concrete is a highly alkaline material. Under normal circumstances, its high alkalinity makes the surface of the steel bar form a dense passivation film, which is the natural protective film of the steel bar. However, the carbonation of concrete and the intrusion of chloride ions can destroy the passivation state of steel bars, leading to their corrosion. Especially for projects in underwater, cross-sea and western saline-alkali areas, the danger of steel bar corrosion is even more serious. Some experts pointed out that the corrosion of steel bars is the main reason for the damage of concrete structures.

[0003] Since the middle of the last century, people have begun to pay attention to the anti-corrosion of steel bars in concrete. Surface coating, cathodic protection, electrochem...

Examples

Embodiment 1

[0051] The weight ratio of the reactants is 41% of propionic acid and 59% of diethanolamine, and the same water as the total amount of the reaction product is added, heated to 60°C, stirred and reacted for 1 hour, and an aqueous solution of the reinforced concrete rust inhibitor is obtained. The experiment was carried out according to the experimental method described later, and the obtained results are shown in Fig. 1 .

Embodiment 2

[0053] The weight ratio of the reactants is 58% of benzoic acid, 13% of cyclohexylamine, and 29% of N,N-dimethylethanolamine, and the same water as the total amount of the reaction product is added, heated to 60°C, and stirred for 1 hour to prepare Obtained reinforced concrete rust inhibitor aqueous solution. The experiment was carried out according to the experimental method described later, and the obtained results are shown in Fig. 2 .

Embodiment 3

[0055] The weight ratio of the reactants is 34% octanoic acid, 31% o-toluic acid, 25% diisopropanolamine, and 10% diethylenetriamine. Add the same amount of water as the total amount of the reaction product, heat to 60°C, and stir After reacting for 2 hours, an aqueous solution of a reinforced concrete rust inhibitor was prepared. The experiment was carried out according to the experimental method described later, and the obtained results are shown in Fig. 3 .

technical field

[0001] The invention relates to a migratory organic reinforced concrete rust inhibitor, which belongs to the technical field of concrete admixtures. Background technique

[0002] Concrete is a highly alkaline material. Under normal circumstances, its high alkalinity makes the surface of the steel bar form a dense passivation film, which is the natural protective film of the steel bar. However, the carbonation of concrete and the intrusion of chloride ions can destroy the passivation state of steel bars, leading to their corrosion. Especially for projects in underwater, cross-sea and western saline-alkali areas, the danger of steel bar corrosion is even more serious. Some experts pointed out that the corrosion of steel bars is the main reason for the damage of concrete structures.

[0003] Since the middle of the last century, people have begun to pay attention to the anti-corrosion of steel bars in concrete. Surface coating, cathodic protection, electrochem...

Examples

Embodiment 1

[0051] The weight ratio of the reactants is 41% of propionic acid and 59% of diethanolamine, and the same water as the total amount of the reaction product is added, heated to 60°C, stirred and reacted for 1 hour, and an aqueous solution of the reinforced concrete rust inhibitor is obtained. The experiment was carried out according to the experimental method described later, and the obtained results are shown in Fig. 1 .

Embodiment 2

[0053] The weight ratio of the reactants is 58% of benzoic acid, 13% of cyclohexylamine, and 29% of N,N-dimethylethanolamine, and the same water as the total amount of the reaction product is added, heated to 60°C, and stirred for 1 hour to prepare Obtained reinforced concrete rust inhibitor aqueous solution. The experiment was carried out according to the experimental method described later, and the obtained results are shown in Fig. 2 .

Embodiment 3

[0055] The weight ratio of the reactants is 34% octanoic acid, 31% o-toluic acid, 25% diisopropanolamine, and 10% diethylenetriamine. Add the same amount of water as the total amount of the reaction product, heat to 60°C, and stir After reacting for 2 hours, an aqueous solution of a reinforced concrete rust inhibitor was prepared. The experiment was carried out according to the experimental method described later, and the obtained results are shown in Fig. 3 .

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