A kind of quaternary ammonium alkali cationic rust inhibitor and its application

Abstract

The invention discloses a quaternary ammonium base cation corrosion inhibitor serving as an electro-migration corrosion inhibitor, and particularly relates to a quaternary ammonium base cation for corrosion prevention and repair of a reinforcing steel bar in a concrete structure. The quaternary ammonium base cation corrosion inhibitor is a compound with a quaternary ammonium base cation structure, the corrosion inhibitor promotes migration of quaternary ammonium base cations under the action of an additional electric field, the quaternary ammonium base cations are gathered on the periphery of the reinforcing steel bar, and the reinforcing steel bar is effectively protected. The quaternary ammonium base cation corrosion inhibitor is high in electro-migration efficiency and stable in molecular structure, does not change along with the internal environment of concrete, can effectively prevent and repair corrosion of the concrete reinforcing steel bar in the built structure, and has remarkable application values and market prospect.

Description

technical field [0001] The invention relates to a steel bar corrosion protection and repair material and its application, in particular to a cation with a quaternary ammonium base molecular structure, which is used as an electromigration rust inhibitor and applied to a reinforced concrete structure. Background technique [0002] As one of the most important reasons for the damage of reinforced concrete structures, the corrosion of steel bars has become a hot problem in the scientific and engineering circles all over the world. Many methods have been applied around the protection and repair of steel corrosion in built concrete structures, including electrochemical cathodic protection, electrochemical dechlorination, electrochemical re-alkalinization, natural migration and electromigratory rust inhibitors, etc. At present, electrochemical cathodic protection and electrochemical dechlorination are recognized as effective in preventing chloride-induced steel corrosion. However,...

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Problems solved by technology

However, since the anions neutralized by the above-mentioned electromigration rust inhibitor molecules are carboxylate or halide ions, in the highly alkaline environment of concrete, the positive charge of the rust inhibitor molecules is easily damaged by the alkaline environment of concrete, and it is difficult to pass through the electric field. Accelerated migration, or re-contamination of steel bars because of their anions as halide ions, the actual effect is still unsatisfactory

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