Preparation method of scale and corrosion inhibitor

Abstract

The invention discloses a preparation method of a scale and corrosion inhibitor, which belongs to the technical field of preparation of water treatment chemicals. Nano cellulose prepared by utilizingneedle wood leaves is used as an adsorption carrier of corrosion inhibitor. The parent corrosion inhibitor prepared by the invention is Mannich base, by virtue of quaternization, the parent corrosioninhibitor adopts nitrogen atoms with larger electronegativity as a center polar group, the polar group is extremely high in hydrophilic performance, the concentration of the metal ions which are easyin forming scales such as calcium and magnesium can be reduced, the surface of a chelated adsorption material is coated with oxidized nano cellulose to form a nano filter membrane, the metal ions canbe efficiently adsorbed, the corrosion of saline-alkaline water for a salt discharging concealed pipe can be reduced, and when the added graphene oxide is oxidized, the graphene lamina is swelled, sothat a gap between two layers can be enlarged, the ion exchange is likely to occur for the metal ions in the saline-alkaline water, and the scale and corrosion inhibitor provided by the invention is high in capability for adsorbing and controlling the metal ions in the saline-alkaline water, and wide in application prospect.

Description

technical field [0001] The invention discloses a preparation method of a scale and corrosion inhibitor, belonging to the technical field of preparation of water treatment agents. Background technique [0002] Scale and corrosion inhibitors are composed of organic phosphine, high-quality copolymers and copper corrosion inhibitors. They have excellent corrosion inhibition performance on carbon steel, copper and copper alloys, and excellent scale and dispersion performance on calcium carbonate and calcium phosphate. It is mainly used in open circulating cooling water treatment systems, especially suitable for systems containing copper equipment. It can be used in water with high pH, ​​high alkalinity, and high hardness. It is currently one of the ideal water treatment agents for alkaline operation without pH adjustment. [0003] There are many kinds of scale and corrosion inhibitors, which are usually compounded with some special structural compounds, and the type should be se...

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Problems solved by technology

[0009] The main technical problem to be solved by the present invention is that the scale and corrosion inhibitors in the prior art have no obvious effect on slowing down the corrosion rate of the salt-discharging concealed pipe, the scale inhibition rate in the salt-discharging concealed pipe is low, and the saline-alkali water infiltrated into the concealed pipe It is easy to corrode the salt discharge underground pipe, which makes its short life, and provides a preparation method of scale and corrosion inhibitor

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