Phosphorus-free corrosion and scale inhibitor

Abstract

The invention relates to a phosphorus-free corrosion and scale inhibitor for use in water treatment equipment. The phosphorus-free corrosion and scale inhibitor comprises the following active components in part by weight: 9 to 10 parts of itaconic acid-acrylic acid-acrylate copolymer, 4 to 5 parts of 2-acrylamide-2-methylpropane sulfonic acid-diethylacrylamide polymer, 4.5 to 5.5 parts of polyepoxysuccinic acid and 5 to 6 parts of hydrolyzed plymaleic anhydride. The active components of the phosphorus-free corrosion and scale inhibitor are natural macromolecular compounds which have a natural ring-shaped structure and characteristics of hydrophilic outer cavity and hydrophobic inner cavity and active groups having high valence metal ion chelation are on the outer sides of the natural macromolecular compounds, so that the inhibitor has a certain corrosion and scale inhibiting property; corrosion and scale inhibiting performance of the inhibitor is greatly improved due to the modification by the advanced technique of multi-disciplines, such as the electrochemistry theory, the quantum chemistry theory and the molecular structure design, molecular weight reduction and the introduction of active groups; and in addition, the inhibitor has the advantages of high corrosion and scale inhibiting performance, no toxin nor harmlessness, stable performance, low price, corrosion resistance, rich raw material sources, easy biological degradation in the environment and the like.

Description

technical field [0001] The invention belongs to the technical field of water treatment, in particular to a corrosion and scale inhibitor used in water treatment equipment for preventing scale. Background technique [0002] In the operation of industrial circulating cooling water treatment, the technology of adding corrosion and scale inhibitors for water treatment has been widely used and developed. In the Standard Definition of Corrosion and Corrosion Experimental Terminology by the American Society for Materials and Experiments, a corrosion inhibitor is a chemical that prevents or slows down corrosion and scaling when it exists in the environment (medium) in an appropriate concentration and form. A substance or a mixture or polymer of several chemical substances. Generally speaking, corrosion and scale inhibitors refer to those substances that are used to protect the metal surface. Adding a small amount of such chemical substances can significantly reduce the corrosion an...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a non-phosphorus corrosion and scale inhibitor to overcome the environmental pollution of existing scale inhibitors and reduce the corrosion of water treatment equipment

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