Phosphorus-free corrosion and scale inhibitor composition, phosphorus-free corrosion and scale inhibitor and application thereof

Abstract

The invention relates to the field of corrosion and scale inhibitors and discloses a phosphorus-free corrosion and scale inhibitor composition. The composition comprises a polymer A, a polymer B, organic acid and / or organic acid salt and water-soluble inorganic zinc salt; the polymer A is a copolymer of maleic anhydride and allyloxy polyoxyethylene maleic acid monoester, and the polymer B is a corrosion inhibition polymer; the weight ratio of the polymer A to the polymer B to the organic acid and / or organic acid salt to the water-soluble inorganic zinc salt is 1:(0.3-6.67):(0.025-1.25):(0.05-1.6). The invention further provides a phosphorus-free corrosion and scale inhibitor and application thereof. According to the phosphorus-free corrosion and scale inhibitor composition, the applicationamount of the corrosion and scale inhibitor is effectively lowered, and the cost is greatly reduced.

Description

technical field [0001] The invention relates to a phosphorus-free corrosion and scale inhibitor composition, a phosphorus-free corrosion and scale inhibitor and applications thereof. Background technique [0002] The formulations of corrosion and scale inhibitors used in cooling water treatment in my country are basically based on phosphorus-based formulations. Although the performance can basically meet the requirements for use, there are still deficiencies in phosphorus-based formulations: phosphorus-based water treatment agents are used in the process of using There is a hidden danger of easy formation of phosphate scale, which affects the heat exchange effect of the water cooler during long-term operation; the phosphorus formula promotes the reproduction of microorganisms in the circulating water, and consumes a large amount of fungicides; the discharge of a large amount of phosphorus can easily lead to eutrophication of the receiving water. Therefore, the development and...

AI Technical Summary

Problems solved by technology

[0002] The formulations of corrosion and scale inhibitors used in cooling water treatment in my country are basically based on phosphorus-based formulations. Although the performance can basically meet the requirements for use, there are still deficiencies in phosphorus-based formulations: phosphorus-based water treatment agents are used in the process of using There is a hidden danger of easy formation of phosphate scale, which affects the heat exchange effect of the water cooler during long-term operation; the phosphorus formula promotes the reproduction of microorganisms in the circulating water, and consumes a large amount of fungicides; the discharge of a large amount of phosphorus can easily lead to eutrophication of the receiving water

Both acrylic acid and 2-acrylamide-2-methylpropanesulfonic acid copolymer substances can promote corrosion. In order to offset the increased corrosion of these substances, the amount of corrosion inhibitor in the formula must be increased, resulting in increased use costs

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