Compound corrosion inhibitor and application of compound corrosion inhibitor in carbon steel material circulating cooling water system

Abstract

The invention discloses a compound corrosion inhibitor and application of the compound corrosion inhibitor in a carbon steel material circulating cooling water system, and relates to the technical field of corrosion prevention in the cooling liquid used for all circulating cooling in smelting production. The compound corrosion inhibitor consists of polyepoxysuccinic acid, zinc vitriol, hydroxy ethidene diphosphonic acid and thiourea. The compound corrosion inhibitor is mixed into circulating cooling liquid to form a circulating cooling water system, and the circulating cooling is carried out with a carbon steel material. According to the compound corrosion inhibitor and the application thereof, the oneness of the collocation of whole organic phosphorus salt formula is avoided, and the collocation of surfactant thiourea and green and environment-friendly organic phosphorus salt is selected, so that synergistic effect among medicaments can be preferably played, the inhibition rate can reach above 90%, the biological degradability is good, the price is low and the materials are easy to obtain.

Description

technical field [0001] The invention relates to the technical field of anti-corrosion in all circulating cooling liquids used in smelting and production, especially its compound agent. Background technique [0002] The industrial circulating cooling water system usually solves the corrosion problem of the system by adding chemicals. Due to the complexity of the industrial circulating cooling water system, it is obviously impossible for a single chemical to solve various corrosion problems of the system at the same time. Through the compounding of several chemicals, it can be Give full play to the synergistic effect between the agents and improve the comprehensive performance of the agents. However, most of the compound agents currently used are difficult to biodegrade when discharged into the environment, causing environmental pollution, and are flammable and explosive. Therefore, it is particularly important to find a high-efficiency, green, and environmentally friendly ci...

AI Technical Summary

Problems solved by technology

However, due to the toxicity of chromate, it is easy to cause environmental pollution, so its use is strictly restricted, and it is gradually replaced by later polyphosphate and organophosphorus agents.

For example, the patent document of Sinopec Beijing Yanhua Petroleum Co., Ltd. with the application number 200410073666.6 is based on polyaspartic acid, 2-phosphobutane-1,2,4-tricarboxylic acid and 2-hydroxyphosphoacetic acid These kinds of organophosphorus-based formulas, although the phosphorus content of this formula has decreased compared with the previous inorganic salt formula, the medicaments contained in this formula only involve organophosphorus salts, which is too single and cannot be applied to complex cycles. water medium

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