High efficiency corrosion inhibiting scale retardant

Abstract

The high efficiency corrosion and scale inhibitor consists of polyhydrolic alcohol phosphate ester 30-40 wt%, zinc sulfate 15-30 wt%, acrylic acid, acrylate and sulfonate copolymer 5-10 wt%, except water. The high efficiency corrosion and scale inhibitor is used as scale inhibitor and corrosion inhibitor in circular cooling water of oil refinery, chemical plant, chemical fertilizer plant, air conditioning system, heat exchanger of copper, etc. and is especially suitable for use in water flooding recovery. The outstanding advantages of the present invention include operating capacity in relatively high concentration of total soluble solid content up to 30 g / L in cooling water, and high corrosion and scale inhibiting effect even if in oil containing sludge water condition.

Description

Technical field: [0001] The invention relates to a chemical reagent, in particular to a reagent for treating corrosion and scaling on metal surfaces, in particular to a high-efficiency corrosion and scale inhibitor. Background technique: [0002] In the prior art, maintenance chemicals are often used in the daily operation of industrial circulating cooling water systems to avoid corrosion and scaling on metal surfaces. [0003] The concentration ratio of the circulating cooling water is the ratio of the salt content of the circulating cooling water to the salt content of the make-up water. Increasing the concentration multiple of circulating cooling water can reduce the amount of make-up water, thereby saving water resources; it can also reduce the amount of sewage, thereby reducing environmental pollution and waste water treatment. In addition, increasing the concentration ratio can also save the consumption of water treatment agents, thereby reducing the cost of cooling w...

AI Technical Summary

Problems solved by technology

However, if the concentration ratio is increased too much, the hardness, alkalinity and turbidity in the circulating cooling water will rise too high, and the scaling tendency of the water will increase a lot, so that the difficulty of scaling control will become too great; Corrosive ions (such as Cl - and SO 4 2- ) and corrosive substances (such as H 2 S, SO 2 and NH 3 ) content increases, the corrosivity of water increases, which increases the difficulty of corrosion control; too much increase in concentration will also increase the residence time of agents (such as polyphosphate) in the cooling water system and hydrolyze