Low-phosphorus corrosion and scale inhibitor

Abstract

The invention relates to a low-phosphorus corrosion and scale inhibitor which comprises the following components in proportion by weight: 10 parts of organic phosphonate, 5 parts of copper corrosion inhibitor BTA, 30 parts of acrylic acid / 2-methyl-2'-acrylamido propanesulphonic acid polymer as a dispersant, 10 parts of zinc sulfate ZnSO4 as a pitting resisting agent and 0.2-0.3 part of molybdate. The price of the corrosion and scale inhibitor is further lower than that of a like medicament imported from a foreign country, lowers the use cost of clients, reaches the index of a national sewage discharge standard and protects the environment. When circulating water is concentrated to be four times, the corroding trend of the circulating water is quite serious, and together with the characteristic of high content of iron ions in the circulating water, the low-phosphorus corrosion and scale inhibitor is selected to achieve the effect of well inhabiting system corrosion.

Description

technical field [0001] The invention belongs to the scale inhibitor used in industrial circulating water for water pumps, pipelines, heat exchangers and other metal equipment in the circulating water system, and particularly relates to a low-phosphorus corrosion and scale inhibitor. Background technique [0002] Corrosion and scale inhibitor is a kind of corrosion and scale inhibitor for circulating water. It is used in industrial circulating water for water pumps, pipelines, heat exchangers and other metal equipment in the circulating water system to slow down the corrosion rate and prevent the generation of scale. It can improve the service life of the equipment and ensure the normal operation of the device. The current corrosion and scale inhibitors on the domestic market are mostly inorganic phosphorus or organic phosphorus corrosion inhibitors, which contain high phosphorus content, which will seriously pollute natural water bodies and cause eutrophication of water bod...

AI Technical Summary

Problems solved by technology

And once it is used improperly, adding too much will cause calcium phosphate formed on the inner wall of the metal heat exchanger in the circulating water system, which will greatly affect the heat exchange efficiency of the heat exchanger, and it is difficult to handle

However, most of the currently used phosphorus-free or low-phosphorus corrosion inhibitors are imported from abroad, which are expensive and increase the cost of use by enterprises, so they are not widely used.

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