Multifunctional organic rust inhibitor and preparation method thereof

Abstract

The invention relates to a multifunctional organic rust inhibitor prepared by reaction of an organic acid and a hydroxyl compound, the molar ratio of organic acid to hydroxyl compound is 1:1-1:2.5; the organic acid is an arbitrary proportion mixture of one or more than two substance of lauric acid, palmitic acid, stearic acid, benzoic acid, p-tert-butyl benzoic acid, lauroyl sarcosine and oleoyl sarcosine, the hydroxyl compound is an arbitrary proportion mixture of one or more than two substance of n-butyl alcohol, lauryl alcohol, ethanolamine, diethanolamine, triethanolamine, N-methyldiethanolamine, N, N-dimethylethanolamine, and 2-amino-2-methyl-1 - propanol. The multifunctional organic rust inhibitor can protect steel bar and concrete from erosion of chloride and sulfate and other corrosion mediums, plays a dual role of concrete self protection and steel bar corrosion protection, greatly improves the service life of a reinforced concrete structure, and is simple in synthesis process and easy to implement.

Description

technical field [0001] The invention relates to a rust inhibitor, in particular to an organic rust inhibitor for reinforced concrete, belonging to the field of building materials. technical background [0002] As the largest building material, reinforced concrete is widely used in structural engineering all over the world. However, as the service environment of concrete is getting harsher, the durability of reinforced concrete structures has become increasingly prominent, which has attracted the attention of scientists and engineers all over the world, so it is of great significance to protect it from damage. Among many protective measures, the use of rust inhibitors has been proven to be one of the most effective, economical and convenient methods. [0003] For a single chloride salt environment, the earliest and representative application is the inorganic nitrite rust inhibitor that began in the 1970s. For example, it was reported in patents US 6340438 and US 5527388 tha...

AI Technical Summary

Problems solved by technology

The rust inhibitors mentioned above mainly absorb the surface of steel bars through polar groups such as heteroatom nitrogen atoms and oxygen atoms, and remove the adsorbed chloride ions, so as to play a role in rust prevention. They are all aimed at a single chloride salt environment, and nearly Over the years, the service environment of reinforced concrete has become more and more complex and harsh. It is not only for a single corrosion environment, but the coupling of multiple corrosion environments in many projects has made the durability of concrete structures more serious.

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