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

Abstract

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.

Description

technical field [0001] The invention relates to a snow-melting agent and a preparation method thereof, in particular to a low-corrosion and high-efficiency chloride salt snow-melting agent and a preparation method thereof. Background technique [0002] Snowfall and icy roads in winter can easily lead to traffic accidents, causing casualties and property losses. Especially, expressways have to be closed and shut down due to snowfall and icing, hindering people's normal transportation and causing great economic losses. Since the 1990s, North America, Northern Europe, Japan, China and other snowy countries and regions have invested a lot of manpower and material resources in research and practice in order to eliminate the hazards of ice and snow, and have explored many effective methods for preventing and removing ice and snow, mainly including Mechanical removal, physical anti-skid and chemical snow melting. Chemical snow melting can avoid the shortcomings of poor mechanical ...

AI Technical Summary

Problems solved by technology

There are two types of deicing agents: non-chlorinated salts and chlorinated salts. Non-chlorinated deicing agents refer to non-chlorinated, non-polluting, and environmentally safe deicing agents. For example, the CMA researched by the DOT company in the United States has excellent environmental protection, but Raw materials for producing CMA are expensive and cannot be popularized

KrisAB has formulated a low-corrosion deicing agent (patent: US628748) with potassium trihydrate, ammonium trihydrate, and sodium trihydrate alone or in combination. It is highly efficient and environmentally friendly, but the price is too high to be popularized; Chloride salt deicing agents are cheap and effective in melting snow, and are widely used in urban areas, highways, etc. to remove snow and ice. For example, the most used snow melting material in the United States is still sodium chloride.

However, chlorine salt deicing agents are highly destructive, mainly reflecting severe corrosion to metals and concrete, thus greatly destroying the road infrastructure and the ecological environment around the road, causing great economic losses

Many overpass bridges built in Tianjin according to the 50-year service life standard have only been built for more than 10 years. Due to the infiltration of salt water from snowmelt in winter, some beam heads, cap beams, and concrete components have cracks, spalling, exposed steel bars, and corrosion. At the same time, some bridges The cable is damaged

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