Scale and corrosion inhibitor and application of scale and corrosion inhibitor in salt draining closed conduit of saline and alkaline land

Abstract

The invention provides a scale and corrosion inhibitor and application of the scale and corrosion inhibitor in a salt draining closed conduit of a saline and alkaline land. The scale and corrosion inhibitor comprises the components in parts by weight: 26-29 parts of ursolic acid, 15-18 parts of rosmarinic acid, 4-6 parts of trifluoroacetic acid, 6-8 parts of bis-1,6-hexylidenetriamine pentamethylene sodium phosphonate, 3-5 parts of thionothiolic acid, 1-3 parts of mannitol, 8-12 parts of polyepoxysuccinic acid, 6-9 parts of sodium benzotriazole, 2-4 parts of propyl hydroxybenzoate and 50-60 parts of water, wherein the purity of ursolic acid is 98%; the purity of rosmarinic acid is 95%; and the solid content of sodium benzotriazole is 40%. By using the scale and corrosion inhibitor provided by the invention, the corrosion rate, which is 0.0006-0.0009 mm / a, of the salt draining closed conduit is obviously reduced, and the service life of the salt draining closed conduit can be prolonged by 10 years.

Description

technical field [0001] The invention belongs to the technical field of salt-discharging hidden pipes, and relates to a scale and corrosion inhibitor, in particular to a scale and corrosion inhibitor and its application in salt-discharging hidden pipes in saline-alkali land. Background technique [0002] The existing salt drainage underground pipe equipment mainly changes the movement law of soil water and salt by controlling the groundwater level and efficiently utilizing precipitation or irrigation water resources, thereby affecting the distribution law of soil salinity and soil characteristics, and achieving the effect of improving saline-alkali land. [0003] The salt content in the saline-alkali land is high, and the salt water infiltrated into the salt drainage pipe is easy to scale and block the micropores of the pipe, and at the same time accelerate the corrosion of the pipe, in order to prevent the above phenomenon. Scale and corrosion inhibitors are often used for d...

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Problems solved by technology

[0005] The scale and corrosion inhibitors of the prior art have the following defects and deficiencies: the corrosion rate effect of the scale and corrosion inhibitors of the prior art to slow down the corrosion rate of the salt discharge underground pipe is not obvious; Low scale inhibition rate; saline-alkali scale makes the service life of the salt drainage pipe not long

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