Corrosion and scale inhibitor for industrial recirculated cooling water

Abstract

The invention provides a corrosion and scale inhibitor for industrial circulated cooling water, which is applicable to a composite for mitigating metal corrosion added into a water body with ultra-low hardness, low alkalinity and strong corrosiveness. The corrosion and scale inhibitor is characterized by comprising the following compositions in percentage by weight: 5 to 20 percent of 2-hydroxyphonoacetic acid, 5 to 25 percent of 2-phosphonobutane-1, 2, 4 - tricarboxylic acid, 10 to 40 percent of acrylic acid-2-acrylamido-2-methylpropane sulfonic acid copolymer, 1 to 8 percent of zinc chloride, 1 to 5 percent of copper corrosion inhibitor, and the balance being water. The corrosion and scale inhibitor has lower contents of inorganic phosphorus and zinc salt, can prevent scale sedimentation of medicine on one hand, and can reduce eutrophication of the water body and heavy metal pollution on the other hand, thereby facilitating the environmental protection.

Description

Technical field: [0001] The invention is applicable to a metal corrosion mitigating composition put in water with ultra-low hardness, low alkalinity and strong corrosiveness, and in particular relates to a corrosion and scale inhibitor for industrial circulating cooling water. Background technique: [0002] Water is the material basis for human survival and the most precious natural resource that cannot be replaced. With the development of social economy and the acceleration of industrialization and urbanization, human demand for fresh water is increasing rapidly. At the same time, the pollution and damage of waste water and sewage to water bodies are becoming more and more serious, and the water resource crisis is bothering and restricting the sustainable development of many countries and regions. With the increasing scarcity of global water resources, it is imperative to rationally allocate and save water. Treating and reusing cooling water, which is a large part of indu...

AI Technical Summary

Problems solved by technology

When this water treatment agent is used, it needs to add four kinds of agents in proportion at the same time, and also needs calcium supplementation and acid addition to control the pH value. nutritional pollution

[0004] Another water treatment agent is S-6450, which is composed of organic phosphonate, inorganic phosphorus compound, zinc salt and sulfonate polymer. The zinc salt content is as high as 8.3%, orthophosphorus is 3.9%, and the corrosion inhibition effect is good. , but it is easy to produce chemical scale on harsh heat exchangers, and the adhesion rate is high