Efficient scale corrosion inhibitor for carbon steel system

Abstract

The invention discloses a high-efficiency scale and corrosion inhibitor for a carbon steel system, and relates to an agent which is used for industrial recirculated cooling water and can inhibit scale and corrosion. The scale and corrosion inhibitor consists of organic phosphonate substances, polycarboxylic acid substances, acrylic acid copolymer substances, polyhydroxycarboxylic acid or sodium salt of the polyhydroxycarboxylic acid, borax, zinc salt and water. The scale and corrosion inhibitor has scientific and reasonable formulas, contains the organic phosphonate substances, the polycarboxylic acid substances and acrylic acid copolymers which have the function of scale inhibition, and also contains substances such as gluconic acid sodium salt, the borax and the zinc salt which have the function of corrosion inhibition; and a preparation of the scale and corrosion inhibitor has higher functions of scale and corrosion inhibition, and can solve corrosion and scaling problems of the carbon steel system. After the prior carbon steel adopts the scale and corrosion inhibitor, the corrosion rate is between 0.05 and 0.07mm / y, and the scale inhibiting rate is between 97.5 and 99 percent. The scale and corrosion inhibitor has simple production and can be obtained by sequentially adding various raw materials into a reaction kettle according to various formulas to stir evenly.

Description

technical field [0001] The invention relates to an antiscaling and corrosion inhibiting preparation for industrial circulating cooling water. Background technique [0002] Due to the high salt content in industrial circulating water, which has corrosive and scaling ions, the carbon steel system has severe corrosion and scaling during operation. At present, the scale and corrosion inhibitors used in carbon steel systems in various industries have the following three types: Insufficiency in one aspect: First, the dosage is large, the minimum dosage is not less than 80mg / l, and the general dosage is 120mg / l, so that the operating cost remains high; second, the scale and corrosion inhibition capabilities cannot be considered at the same time, Good scale inhibition ability has poor corrosion inhibition ability, and good corrosion inhibition ability has poor scale inhibition ability. Third, the currently commercially available carbon steel scale and corrosion inhibitors all conta...

AI Technical Summary

Problems solved by technology

[0002] Due to the high salt content in industrial circulating water, which has corrosive and scaling ions, the carbon steel system has severe corrosion and scaling during operation. At present, the scale and corrosion inhibitors used in carbon steel systems in various industries have the following three types: Insufficiency in one aspect: First, the dosage is large, the minimum dosage is not less than 80mg / l, and the general dosage is 120mg / l, so that the operating cost remains high; second, the scale and corrosion inhibition capabilities cannot be considered at the same time, Good scale inhibition ability has poor corrosion inhibition ability, good corrosion inhibition ability has poor scale inhibition ability

Third, the currently commercially available carbon steel scale and corrosion inhibitors all contain a large amount of inorganic phosphorus, which will cause eutrophication to the water environment. To achieve the required scale and corrosion inhibition effects, a large dose of chemicals must be added