Environment-friendly composite steel bar corrosion inhibitor for marine environment and preparation method of corrosion inhibitor

Abstract

The invention relates to an environment-friendly composite reinforcing steel bar corrosion inhibitor for a marine environment and a preparation method of the corrosion inhibitor, and belongs to the technical field of material science and engineering. The reinforcing steel bar corrosion inhibitor is prepared by compounding the following components in parts by mass: 0.15-0.35 part of molybdate, 0.1-0.65 part of benzotriazole and 100 parts of water. The preparation method comprises the following steps: firstly, weighing the molybdate and the benzotriazole in parts by mass, adding the molybdate and the benzotriazole into an alkaline solution with the pH value of 13.5 at room temperature, and uniformly stirring by using a glass rod. According to the invention, molybdate and benzotriazole which are harmless to the natural environment are compounded, so that harm of harmful corrosion inhibitors to the environment is reduced, and the composite corrosion inhibitor is green and environment-friendly. The molybdate and the benzotriazole are compounded to generate a synergistic effect, so that the reinforcing steel bar forms a layer of adsorption film in a marine environment, the film is high in compactness, can effectively prevent harmful ions from eroding the surface of the reinforcing steel bar and has a relatively good rust inhibition effect, and the preparation method is simple, economical in cost and convenient for industrial production.

Description

technical field [0001] The invention belongs to the field of material science and engineering technology, and in particular relates to an environment-friendly composite steel bar rust inhibitor for marine environment and a preparation method thereof. Background technique [0002] Reinforced concrete structure is currently the most widely used structure in the civil engineering industry. Due to its excellent mechanical properties and relatively low cost, it has become the best choice for engineering construction. A highly alkaline pore solution (pH ≈ 12.5) is formed in fresh concrete, which promotes a stable protective passivation film on the reinforcement. However, due to the corrosion of chloride salts in the marine environment, the passivation film of steel reinforcement is broken, and local corrosion occurs, which causes the failure of concrete components and causes huge economic losses. Therefore, it is very important to study how to prevent and delay the corrosion of s...

AI Technical Summary

Problems solved by technology

However, the single molybdate is used in a large amount and is expensive. Therefore, in order to reduce the amount and save costs, it is necessary to study an efficient compound rust inhibitor

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