Low-corrosion and high-efficiency chlorine salt deicing agent and preparation method thereof

The invention discloses a low-corrosion and high-efficiency chlorine salt deicing agent, which is prepared from the following raw materials in percentage by mass: 85%-98% of sodium chloride, 1%-10% of a corrosion inhibitor and 1%-5% of an adjuvant, wherein the corrosion inhibitor is prepared from sodium silicate, disodium hydrogen phosphate, sodium tartrate and sodium citrate; and the adjuvant is prepared from sodium humate, urea and heteroauxin. Silicate in the corrosion inhibitor disclosed by the invention can form a protective film on the metal surface to avoid corrosion to metal caused by chlorine salt and synergistic effect of disodium hydrogen phosphate and sodium silicate; the corrosion inhibition effect is enhanced; a chemical adsorption layer is formed by coordinated complexation of polar radical of sodium citrate and sodium tartrate donor and a metal surface; a dual-electric layer structure is formed on the metal surface; a drainage layer is formed by nonpolar radical directional arrangement; chemical corrosion of metal is prevented; and the damages to soil and plants can be reduced by urea, sodium humate and heteroauxin. The preparation method disclosed by the invention is simple, mild in condition, available in raw materials, and easy to put into industrial application, and can be carried out under normal temperature and pressure.