Non-phosphorus solid slow-release corrosion inhibitor

Abstract

The invention provides a non-phosphorus solid slow-release corrosion inhibitor. The non-phosphorus solid slow-release corrosion inhibitor comprises 20%-30% of boric acid, 25%-35% of borax, 10%-20% of Na2O, 15%-25% of SiO2, 5% of Na2SO4 and 5% of (NH4)6Mo7O24. The corrosion inhibitor provided by the invention is the non-phosphorus corrosion inhibitor, the content of phosphate in water is decreased beneficially, and the eutrophication risk of receiving water is reduced; aiming at the acidic water quality (pH is larger than or equal to three), the medium-high-salinity water quality (the content of Cl- is smaller than or equal to 0.5mol / L) and the medium-high-alkalinity water quality (the content of CaCO3 is smaller than or equal to 250mg / L), the corrosion inhibitor is researched and developed, and corrosion of carbon steel materials in the acidic water quality environment, the medium-high-salinity water quality environment and the medium-high-alkalinity water quality environment can be effectively inhibited; and the corrosion inhibitor belongs to a slow-release medicament, and the corrosion inhibition effect of the medicament lasts for 30 days or more.

Description

technical field [0001] The invention relates to a phosphorus-free solid slow-release corrosion inhibitor, in particular to a corrosion inhibitor applicable to natural conditions, acidic conditions (pH: ≥ 3), salinity conditions (with Cl - meter: ≤0.5 mol / L) and alkalinity conditions (as CaCO 3 Calculation: ≤250 mg / L) solid phosphorus-free slow-release corrosion inhibitor. Background technique [0002] Circulating water system is an effective water-saving measure and is widely used in industrial production. However, with the continuous operation of the circulating water system, the circulating water is continuously reused, and the concentration of corrosion factors in the water increases exponentially, causing corrosion of pipelines and equipment, causing direct economic losses to enterprises. At present, in industrial production, the method of adding corrosion inhibitors is often used to control pipeline corrosion. The commonly used corrosion inhibitors are chromate serie...

AI Technical Summary

Problems solved by technology

In addition, the corrosion inhibitors currently used are mainly liquid, and the dosage is large, and the effect of the agent is not long-lasting after one dosage, so frequent dosage is required to control the corrosion of pipelines

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