Preparation method of non-phosphorus corrosion and scale inhibitor

Abstract

The invention relates to a preparation method of a non-phosphorus corrosion and scale inhibitor. The preparation method of the non-phosphorus corrosion and scale inhibitor is characterized by being blended from the following components in percentage by weight: 1) 5-15% of polyepoxysuccinic acid, 2) 5-15% of a dirt dispersion agent, 3) 20-50% of organic carboxylic acid, 4) 5-10% of zinc salt, 5) 0.1-0.5% of imidazole, 6) 0.5-3% of an inorganic corrosion inhibitor, and 7) the balance of water according to mass percent, wherein the polyepoxysuccinic acid is a market-sold liquid preparation, the solid content is 40%, and the degree of polymerization n is an integer of 10-50. The preparation steps are as follows: adding the zinc salt and the inorganic corrosion inhibitor in a fixed amount of water, fully stirring to completely dissolve the zinc salt and the inorganic corrosion inhibitor, then adding the polyepoxysuccinic acid, the dirt dispersion agent and the organic carboxylic acid, fully stirring, finally adding the imidazole until the imidazole is completely dissolved, and filtering.

Description

technical field [0001] The invention relates to the technical field of industrial water treatment, in particular to a preparation method of a phosphorus-free corrosion and scale inhibitor, in particular to a preparation method of a phosphorus-free corrosion and scale inhibitor suitable for medium-alkali hard water. It is a phosphorus-free, nitrogen-free, biodegradable and environmentally friendly pharmaceutical preparation method suitable for industrial circulating cooling water systems. Background technique [0002] During the continuous circulation of industrial cooling water in the circulation system, there will be different degrees of precipitation and adhesion of sediments, metal corrosion and microbial growth, which will cause sticky sludge to block pipes, reduce the efficiency of heat exchange equipment, and corrode and perforate, etc. Serious consequences will threaten and destroy the long-term safe production of the factory. The use of appropriate corrosion and sca...

AI Technical Summary

Problems solved by technology

In the composite formula, in addition to the above substances, it also includes other components such as polymaleic anhydride, acrylic acid copolymer, benzotriazole or tungstate, borate, etc. The formula is complicated and the configuration process is complicated and cumbersome

Due to the lack of organic phosphoric acid and polyphosphate, especially in medium-alkali hard water, the scale inhibition effect is much different than that of phosphorus systems, which leads to increased corrosion and adverse consequences

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