Phosphorus-free corrosion and scale inhibitors suitable for medium-low hardness and strong corrosive water quality and its application

Abstract

The invention relates to a non-phosphorus corrosion and scale inhibitor suitable for medium-and-low-hardness and strong-corrosion water and application of the non-phosphorus corrosion and scale inhibitor. The non-phosphorus corrosion and scale inhibitor is prepared from the following ingredients by weight percent: 15-30% of an AMPS-containing terpolymer, 12-20% of hydrolyzed polymaleic acid, 0.1-10% of sodium gluconate, 15-40% of a fatty alcohol polyoxyalkylene alkyl ether-carboxyl-sulfopropionate copolymer, 0.1-3% of a pH regulator, 0.1-12% of zinc salt, 0.1-5.0% of benzotriazole, 0.5-5.0% of a water-soluble inert fluorescent tracer and 15-40% of deionized water. Compared with the prior art, the non-phosphorus corrosion and scale inhibitor provided by the invention solves the problem that a common non-phosphorus corrosion and scale inhibitor cannot draw the corrosion and scale inhibition function into consideration during concentration of a circulating water system. The non-phosphorus corrosion and scale inhibitor is favorable in performance and good in stability, has general applicability to medium-and-low-hardness and strong-corrosion water, and has the characteristics of no phosphorus, environmental friendliness and high efficiency.

Description

technical field [0001] The invention relates to a phosphorus-free corrosion and scale inhibitor suitable for industrial circulating cooling water systems, in particular to a phosphorus-free corrosion and scale inhibitor suitable for medium-low hardness and strong corrosive water quality and its application. Background technique [0002] In order to cooperate with the country's economic transformation and development and protect resources and the environment, the national environmental protection department has intensified environmental monitoring efforts, among which the prevention and control of water pollution is the top priority. On the one hand, the government encourages enterprises to use high-tech and give full play to their advantages in scientific research, realize technological transformation and upgrading, effectively and reasonably save water and protect water resources from pollution. The enterprise's water terminal sewage meets the local environmental protection...

AI Technical Summary

Problems solved by technology

[0010] The above-mentioned invention patents can quickly detect the concentration of non-phosphorus corrosion and scale inhibitors used in the treatment of highly corrosive water quality in industrial circulating cooling water through fluorescence detection technology, which emphasizes the rapid detection of non-phosphorus corrosion and scale inhibitors However, according to the nature of the fluorescent compound, when the general fluorescent compound is placed in the industrial circulating cooling water system, it is possible to cause a signal change of more than 10% in the fluorescent signal, which leads to the analysis and detection results. The deviation of the non-phosphorus corrosion and scale inhibitor will lead to a large deviation of the actual concentration of the non-phosphorus corrosion and scale inhibitor, which may lead to the lag of chemical control in practical applications and directly affect the comprehensive performance of the non-phosphorus corrosion and scale inhibitor.

[0011] In addition, the technical solution of the above-mentioned invention patent, because its formula is mainly a mixture of polymer and zinc salt, so in the application of corrosion control in highly corrosive water quality systems, due to the nature of the formula itself, it cannot well inhibit corrosion. The pitting phenomenon of the water quality system, so it is still difficult to solve the corrosion control problem of the corrosive water quality system

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