Surface coating type reinforced concrete corrosion inhibitor and preparation method thereof

The invention relates to a surface coating type reinforced concrete corrosion inhibitor. The surface coating type reinforced concrete corrosion inhibitor comprises the components as follows: 15 to 40 wt% of a non-ionic surface active agent with HLB (Hydrophile Lipophile Balance) value more than 10, 5 to 30 wt% of a cosurfactant, 1 to 20 wt% of water insoluble organic inhibitor, and 20 to 50 wt% of water, wherein the cosurfactant is selected from organic alcohol or organic amine. The preparation method comprises the steps of mixing the non-ionic surface active agent, the cosurfactant and the water insoluble organic inhibitor, and agitating along with heating unit the mixture is completely molten, and then agitating along with water adding until the mixed liquid is turned into a clear state from a muddy state, thus obtaining the product. The preparation method provided by the invention is simple; the prepared product can be applied to surface treatment of the constructed concrete structure; and the prepared product has superior infiltration capacity, can effectively prevent the reinforcement surface from being eroded by chloride salt and sulfate, and has no adverse effect to the performance of the concrete.