Phosphorus-free corrosion and scale inhibitor

A phosphorus-free corrosion and scale inhibitor technology, applied in the field of phosphorus-free corrosion and scale inhibitors, can solve the problems of lake water bloom, seawater red tide, microbial algae overgrowth, etc., and achieve the effect of reducing treatment costs

Inactive Publication Date: 2012-07-11
天津通悦科技有限公司
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the cooling water treatment agents used in open systems are phosphorus-based formulations, but the discharge of phosphorus will cause eutrophication in the surrounding waters, promote the excessive reproduction of microorganisms, especially algae, and cause lake water blooms, seawater red tides and other hazards

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0005] Sodium molybdate is compounded with zinc salt, polyaspartic acid PASP and benzotriazole BTA. With the help of the synergistic effect between the components, an oxidized protective film is formed on the surface of the metal anode, and a precipitated film is formed on the surface of the metal cathode. , Play the role of metal corrosion inhibition, enhance the corrosion inhibition effect, thereby greatly reducing the amount of sodium aluminate. And with the help of polyaspartic acid PASP, polyepoxysuccinic acid PESA, sodium citrate and acrylic acid sulfonic acid terpolymer to chelate and disperse scale-causing metal ions synergistically, its scale inhibition performance is improved. Add zinc salts (including zinc chloride, zinc sulfate heptahydrate, zinc sulfate monohydrate) to the formula, which can be Zn(OH) in water 2 Form a precipitation film on the surface of the cathode area of ​​the metal surface, the deposition speed is fast, and the corrosion inhibition and synerg...

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Abstract

The invention discloses a phosphorus-free corrosion and scale inhibitor. The phosphorus-free corrosion and scale inhibitor is characterized by consisting of sodium molybdate, zinc salt, citrate, triethanolamine, benzotriazole (BTA), polyaspartic acid (PASP), polyepoxysuccinic acid (PESA), an acrylic acid-sulfonic acid terpolymer, solid alkali and water. When the phosphorus-free corrosion and scale inhibitor is used for cooling water, the phosphorus-free corrosion and scale inhibitor is nontoxic and phosphorus-free, main organic ingredients are easy to biodegrade, the environment problem is solved, the discharge is not limited by phosphorus, the subsequent treatment cost is greatly reduced, the corrosion rate of carbon steel is less than or equal to 0.1mm / a, the corrosion rate of copper, copper alloys and stainless steel is less than or equal to 0.005mm / a, and the scale inhibition rate is more than or equal to 90 percent.

Description

technical field [0001] The invention relates to a water treatment agent, in particular to a phosphorus-free corrosion and scale inhibitor. Background technique [0002] Antiscalants are chemical agents that can prevent scale from forming or inhibit its deposition and growth. At present, most of the cooling water treatment agents used in open systems are phosphorus-based formulations, but the discharge of phosphorus will cause eutrophication in the surrounding waters, promote the excessive reproduction of microorganisms, especially algae, and cause lake water blooms, seawater red tides and other hazards . Contents of the invention [0003] According to the above technical problems, the present invention provides a simple, practical, and environmentally friendly phosphorus-free corrosion and scale inhibitor, which is characterized in that the phosphorus-free corrosion and scale inhibitor is composed of sodium molybdate, zinc salt, citrate, triethanolamine, benzene Composed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/10C02F5/12
Inventor 胡艳平
Owner 天津通悦科技有限公司
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