Low-cost rebar corrosion inhibitor

Abstract

The invention discloses a low-cost rebar corrosion inhibitor and belongs to the technical field of building materials. The corrosion inhibitor is compounded of corrosion inhibition components (sodium benzoate, sodium acetate, thiocarbamide and magnesium oxide) and water serving as a dispersion medium, wherein sodium benzoate is an organic type corrosion inhibition component and belongs to anodic corrosion inhibition components; sodium acetate and thiocarbamide are organic type corrosion inhibition components and belong to mixed type corrosion inhibition components; magnesium oxide is an inorganic type corrosion inhibition component; therefore, the corrosion inhibitor disclosed by the invention is compounded of the organic and inorganic corrosion inhibition components and also is a mixture and a composition of the anodic corrosion inhibition component and the mixed type corrosion inhibition component, so that the prepared corrosion inhibitor has obvious inhibition effects on the anodic reaction and cathodic reaction in the rebar corrosion process, the defects of singly using organic or inorganic corrosion inhibition component is overcome. The corrosion inhibitor is low in price, low in use amount, non-toxic and pollution-free, and can be used in a way of being directly mixed with concrete, is well adapted to the concrete, and can be widely applied to reinforced concrete structure of water conservancy, railways, and civil buildings.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a low-cost rust inhibitor for steel bars. Background technique [0002] Reinforced concrete is an economical and practical structural material that is widely used in structures such as bridges, buildings, embankments, subsea tunnels, and large offshore platforms. Corrosion of steel bars in concrete has become the main factor affecting the durability of reinforced concrete structures. In newly-built reinforced concrete, due to the existence of high-alkalinity pore fluid, a passivation film will be formed on the surface of the steel bar to protect the steel bar. But over time, due to CO 2 The intrusion of chlorination causes the carbonation of concrete, the alkalinity of the concrete pore fluid decreases, the passivation film on the surface of the steel bar becomes unstable, and the chloride ions in the surrounding medium penetrate to the surface of the ste...

AI Technical Summary

Problems solved by technology

9% to 4.5%, propylene thiourea 0.08% to 0.19%, 1,4-butynediol 0.15% to 0.75%, and the balance is composed of water. Chinese patent CN102491668 discloses a rust inhibitor composed of silicate 0.1% to 0.5%, metasilicate 0.1% to 1.5%, organic amine 0.1% to 1.5%, gluconic acid 0.1% to 1.5%, and the balance is composed of water. Rust agent, but its anti-rust component content is high, the cost is high, the economic benefit is low, and it is not easy to be popularized and applied in industrialization