Electrochemical corrosion apparatus and electrochemical corrosion method of reinforcing steel bar in seawater full immersion zone reinforced concrete

Abstract

The present invention discloses an electrochemical corrosion apparatus of reinforcing steel bar in seawater full immersion zone reinforced concrete. The electrochemical corrosion apparatus comprises a cathode for making dissolved oxygen in seawater obtain electron, an auxiliary anode and a direct current power supply, wherein the cathode, the auxiliary anode and seawater form an electrochemical oxygen filter after electrifying, the oxygen close to the concrete surface is converted into hydroxide radicals and / or hydrogen peroxide ions through the cathode, and the chlorine ions in the seawater move to close to the auxiliary anode under the effect of electric field force and generate chlorine gas under the effect of the auxiliary anode. According to the present invention, with the technical scheme, the dissolved oxygen in the reinforcing steel bar surface region is eliminated while the chlorine ions in the reinforcing steel bar surface passivation film can be damaged, such that the reinforcing steel bar can be used in the seawater for a long time; and during the diffusion process of the dissolved oxygen to the concrete structure, when the dissolved oxygen passes through the electrified low carbon steel net, the dissolved oxygen can be transferred to the carbon steel net surface as more as possible so as to be consumed, such that the oxygen is prevented from reaching the reinforcing steel bar surface.

Description

technical field [0001] The invention proposes an electrochemical-based anti-corrosion system aimed at steel bar corrosion in concrete structures in seawater immersion areas. Plating of metal materials involving patent classification number C23; plating of materials with metal materials; surface chemical treatment; diffusion treatment of metal materials; general plating by vacuum evaporation, sputtering, ion implantation or chemical vapor deposition Coating; general inhibition of corrosion or fouling of metallic materials C23F Removal of metallic materials from surfaces by non-mechanical means C23F13 / 00 Protection of metals from corrosion by anodic or cathodic protection. Background technique [0002] As an important building material, reinforced concrete is widely used in cross-sea bridges. In the marine environment, reinforced concrete structures will suffer serious damage due to corrosion. Because the splash zone is in a high-salinity environment with alternating wet and...

AI Technical Summary

Problems solved by technology

However, due to the limitation of underwater construction conditions and high costs, it is necessary for us to invent a new method that does not require previous underwater measurements for corrosion protection of steel bars in reinforced concrete in underwater areas.

Images