Non-phosphorus polymer corrosion inhibitor and preparation method and application thereof

Abstract

The invention relates to the field of corrosion inhibitors, and discloses a non-phosphorus polymer corrosion inhibitor. The non-phosphorus polymer corrosion inhibitor is shown in the general formula in the description, wherein R1 is <->H, <->COOH or phenyl; R2 is <->H, <->CH2COOH or low-carbon alkyl of C1-C5; R3 is <->CO(CH2)kCOOH, <->COCH(OH)COOH, <->COCH(OH)CH2COOH, <->COCH2CH(OH)COOH, <->COCH(OH)CH(OH)COOH, <->COCH=CHCOOH, <->CO(o-C6H4)COOH, <->CO(p-C6H4)COOH, <->COCH2C(OH)(COOH)CH2COOH, <->COC(OH)(CH2COOH)2, <->COCH=C(COOH)CH2COOH, <->COCH2C(COOH)=CHCOOH and <->COC(CH2COOH)=CHCOOH; the polymerization degree x is 1-5000; the polymerization degree y is 1-5000; the polymerization degree z is 1-5000; the polymerization degree m is 1-100; the polymerization degree n is 1-100; the polymerization degree k is 0-8. The invention further discloses a preparation method and application of the non-phosphorus polymer corrosion inhibitor. The non-phosphorus polymer corrosion inhibitor has a goodcorrosion inhibition effect.

Description

technical field [0001] The invention relates to a phosphorus-free polymer corrosion inhibitor and its preparation method and application. Background technique [0002] The corrosion and scale inhibitors used in cooling water treatment in my country are basically based on phosphorus-based formulas. Although the performance can basically meet the requirements for use, there are deficiencies in phosphorus-based formulas: (1) Phosphate-based formulas are easy to form during use. (2) Promote the reproduction of microorganisms in the circulating water system and consume a large amount of fungicides; (3) The discharge of a large amount of phosphorus will easily lead to eutrophication of the receiving water body. Therefore, the development and use of phosphorus-free corrosion and scale inhibitors is of great significance to the treatment of circulating cooling water. [0003] Most of the common corrosion and scale inhibitors contain polymer components, such as hydrolyzed polymaleic ...

AI Technical Summary

Problems solved by technology

[0002] The corrosion and scale inhibitors used in cooling water treatment in my country are basically based on phosphorus-based formulas. Although the performance can basically meet the requirements for use, there are deficiencies in phosphorus-based formulas: (1) Phosphate-based formulas are easy to form during use. (2) Promote the reproduction of microorganisms in the circulating water system and consume a large amount of fungicides; (3) The discharge of a large amount of phosphorus will easily lead to eutrophication of the receiving water body

However, except for HPMA, PESA, and PASP, which have a certain corrosion inhibition ability, most of them not only fail to inhibit corrosion, but promote corrosion. In order to offset these increased corrosion, the amount of corrosion inhibitor in the formula must be increased, resulting in increased use costs.

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