Metal corrosion inhibitor composition, metal corrosion inhibitor thereof and application thereof

Abstract

The invention provides a metal corrosion inhibitor composition, a metal corrosion inhibitor thereof and an application thereof. The metal corrosion inhibitor composition contains a water-soluble inorganic zinc salt, an organic phosphine compound, an inorganic phosphorus compound, polyepoxysuccinic acid, a polyacrylamide polymer, and a gluconate, wherein the weight ratio is 0.5-5:0.1-5:0.1-2.5:0.5-8:3-20:1. The metal corrosion inhibitor of the invention has the advantages of good water solubility, and easy complex use with other water processing agents, can satisfy anticorrosion requirements of various metal devices (such as copper devices), and also can satisfy requirements of carbon steel devices of a system, so the metal corrosion inhibitor has very high industrial application values.

Description

technical field [0001] The invention relates to a metal corrosion inhibitor composition, a metal corrosion inhibitor using the metal corrosion inhibitor composition of the invention and its application as a copper corrosion inhibitor. Background technique [0002] Cooling water is an indispensable public works for industrial enterprises, and it is a large water user. Recycling the cooling water after treatment, on the one hand, can meet the requirements of the process for water treatment effect and ensure the long-term normal operation of the production device; on the other hand, it can save more than 98% of industrial water, reduce a larger amount of sewage, and protect water Resources, water environment protection, and production cost reduction have huge benefits. [0003] Copper has excellent strength, machinability, thermal conductivity, electrical conductivity, weldability and corrosion resistance, and is widely used in thermal cycle systems in industrial production. ...

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Problems solved by technology

[0004] However, most of the copper corrosion inhibitors currently used are more or less toxic, such as the above-mentioned commonly used derivatives of BTA, imidazole, thiazole, carbazole, aniline, thiourea and triphenylmethane, etc., due to these corrosion inhibitors The toxicity of copper has brought a lot of inconvenience to the application process; at the same time, the copper corrosion inhibitors currently used are poor in water solubility, and it is difficult to compound with other scale and corrosion inhibitors, and most of the water cooling equipment in the circulating water system It is carbon steel, and part of the equipment is made of copper. Therefore, in addition to using conventional corrosion and scale inhibition water treatment agents to protect carbon steel from corrosion, copper corrosion inhibitors should also be added to prevent copper from corrosion. The defect of poor water solubility of the corrosion agent makes it necessary to add copper corrosion inhibitors separately in the industrial process, which brings a lot of trouble to the on-site operation; at the same time, the cost of the above-mentioned conventionally used copper corrosion inhibitors is higher than that of commonly used water treatment chemicals. This further increases the cost of water treatment

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