Phosphorus-free composite corrosion and scale inhibitor containing natural biodegradable substances

Abstract

The invention introduces a phosphorus-free composite corrosion and scale inhibitor containing natural biodegradable substances. The phosphorus-free composite corrosion and scale inhibitor consists of the following raw materials in a mixing way: zinc sulfate or zinc nitrate, alkyl glycoside, polyaspartic acid, carboxymethylcellulose, polyepoxysuccinic acid, polymerized amino acid, sodium gluconate, methylbenzotriazole or benzotriazole, and water or deionized water. The raw materials are nontoxic, natural, renewable and degradable. The phosphorus-free composite corrosion and scale inhibitor has the advantages of no toxicity, no harm, biodegradability, stable performance, wide raw material source and the like. The synergistic effect of all compositions is fully utilized to improve the performance and reduce dosage. When the phosphorus-free composite corrosion and scale inhibitor is used for circulating cooling water treatment, calcium carbonate, calcium sulfate and calcium phosphate can be prevented from being deposited, the scale inhibition effect is obvious and the corrosion inhibition performance is excellent. The eutrophication of the water body can be effectively avoided, the used amounts of germicide and algaecide are reduced and the economic benefit is remarkable.

Description

technical field [0001] The invention relates to a corrosion and scale inhibitor, in particular to a phosphorus-free composite corrosion and scale inhibitor containing natural biodegradable substances. Background technique [0002] The calcium and magnesium plasma contained in the water will continuously scale on the surface of the pipe wall in the circulating cooling water system, resulting in a decrease in the heat transfer efficiency of the pipe wall, and in severe cases, affecting the flow of circulating water. At the same time, electrochemical corrosion is formed, which makes the pipe wall gradually thinner, reduces the service life, and seriously affects the safe operation of the system. The traditional way to solve this problem is to add corrosion and scale inhibitors. Currently commonly used organophosphorus formula corrosion and scale inhibitors include hydroxyethylidene diphosphonic acid (HEDP), aminotrimethylene phosphonic acid (ATMP), 2-phosphonic acid butane-1,2...

AI Technical Summary

Problems solved by technology

Currently commonly used organophosphorus formula corrosion and scale inhibitors include hydroxyethylidene diphosphonic acid (HEDP), aminotrimethylene phosphonic acid (ATMP), 2-phosphonic acid butane-1,2-phosphonic acid butane-2 , 4-tricarboxylic acid (PBTCA), etc. Compared with the early phosphate, it not only improves the efficiency of corrosion and scale inhibition, but also reduces the phosphorus content, which can reduce the pollution of water bodies, but it cannot avoid the impact on eutrophication of water bodies

These commonly used corrosion and scale inhibitors use polycarboxylates and polysulfonic acids as scale inhibitors and dispersants. Since they cannot be biodegraded, they accumulate continuously and will inevitably have adverse effects on water bodies.

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