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A kind of steel bar rust inhibitor and its application

A technology of steel rust inhibitor and hydroxyamide, which is applied in the field of building materials, can solve the problems of high volatility and weak adsorption capacity, and achieve the effects of excellent effect, improved corrosion resistance, and improved hydrophobicity

Active Publication Date: 2017-10-27
JIANGSU SOBUTE NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, solve the problems of weak adsorption capacity and high volatility of low-molecular-weight alcohol amines, effectively improve the rust inhibition efficiency and ion corrosion resistance of rust inhibitors, and expand the application range of rust inhibitors

Method used

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  • A kind of steel bar rust inhibitor and its application
  • A kind of steel bar rust inhibitor and its application
  • A kind of steel bar rust inhibitor and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A novel rust inhibitor for steel bars, the rust inhibitor for steel bars is a compound with a hydroxyamide structure, the structure is shown in A (N, N-dimethylglucamide) in table 1, corresponding to the structural formula (I) Middle R 3 is hydroxyl, m=4, R 1 with R 2 Both are methyl. After the structural formula A is formulated into a 20% aqueous solution, the hydroxyamide-based novel steel rust inhibitor is obtained, which is marked as S1.

Embodiment 2

[0031]A novel rust inhibitor for steel bars, the rust inhibitor for steel bars is a combination of a compound having a hydroxyamide structure and an organic carboxylic acid, wherein the hydroxyamide is N-phenylglucosamide, and the structure is shown in B in Table 1, corresponding to R in the structure is formula (I) 3 is hydroxyl, m=4, R 1 for H, R 2 For phenyl. N-phenylglucamide is mixed with benzoic acid to obtain a composition of hydroxyamide and organic carboxylic acid. The mass fraction proportion of each component is N-phenylglucamide accounting for 15%, benzoic acid accounting for 15%, and the rest is water, and the obtained rust inhibitor is marked as S2.

Embodiment 3

[0033] A novel rust inhibitor for steel bars, said steel bar rust inhibitor is a combination of a compound with a hydroxyamide structure and an organic carboxylate, including the following components and proportions: N-phenylglucosamide accounts for 15% of the mass fraction , the organic carboxylate formed by gluconic acid and ethanolamine accounts for 5% of the total mass fraction, the balance is water, and the obtained rust inhibitor is marked as S3.

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Abstract

The invention discloses a steel bar rust inhibitor and its application. The steel bar rust inhibitor includes a compound with a hydroxyamide structure and a composition thereof with an organic carboxylic acid or an organic carboxylate. The organic carboxylic acid The salt is the salt formed by the reaction of the organic carboxylic acid with at least one or any two of the inorganic base, organic amine, and organic alcohol amine. The ratio is: hydroxyamide accounts for 2% to 35% of the total mass fraction, organic carboxylic acid or salt accounts for 0% to 45% of the total mass fraction, and the balance is water; It can also be used as a surface coating rust inhibitor. The rust inhibitor for steel bars is suitable for the corrosion protection and repair of steel bars in concrete structures under high chloride salt and the coupling environment of chloride salt and carbonation.

Description

technical field [0001] The invention relates to a novel rust inhibitor for steel bars, which specifically includes the application of a hydroxyamide compound and its composition with organic carboxylic acid or organic carboxylate as a rust inhibitor for steel bars, and belongs to the technical field of building materials. Background technique [0002] Reinforced concrete is the most important civil engineering structure, and the construction scale is getting larger and larger. However, with the global climate change and the increasingly harsh concrete service environment, the corrosion damage of concrete structures will bring huge losses to the national economy. Among them, the corrosion of steel bars, as the main cause of corrosion damage to concrete structures, has been widely concerned by scientific and technological workers at home and abroad. The steel rust inhibitor is considered to be one of the effective, economical and convenient methods to solve this problem. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/12C04B103/61
CPCC04B24/12C04B40/0039C04B2103/61C04B24/04
Inventor 刘加平蔡景顺赵旦石亮刘建忠沙建芳姜骞
Owner JIANGSU SOBUTE NEW MATERIALS
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