Method for improving performance of corrosion inhibitor in industrial cooling water system

A technology of cooling water system and corrosion inhibitor, applied in the field of improving the performance of corrosion inhibitor in industrial cooling water system, can solve the problems of high cost of chemical agents, environmental pollution and the like

Inactive Publication Date: 2013-12-18
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of corrosion inhibitors can better control the corrosion of metals during the operation of the circulating coolin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In simulated water containing 0, 0.5, 1, 2, 3, 5mg / L benzotriazole respectively, the corrosion current density of brass was tested to be 0.82, 0.49, 0.17, 0.12, 0.16 and 0.18μA / cm 2 , Under this condition, the corrosion inhibition rates of benzotriazole with concentrations of 0.5, 1, 2, 3, and 5 mg / L on brass were calculated to be 40.2%, 79.3%, 85.4%, 80.5% and 78.0%, respectively.

Embodiment 2

[0028] In blank simulated water, the corrosion current density of brass is 0.82μA / cm 2 . After the simulated water was treated with frequency conversion DC pulse electromagnetic water processor for 0.5h and 1h respectively, the corrosion current density of brass was tested to be 0.84μA / cm 2 . The results show that pure electromagnetic treatment has no corrosion inhibition performance on brass;

[0029] The frequency conversion DC pulse electromagnetic water processor has a power supply of AC 220V, 50Hz, a working voltage of DC 10-15V, an output power of 100-300W, a frequency conversion range of 20Hz~75KHz, and a carrier frequency of 1MHz.

Embodiment 3

[0031] The simulated water containing 0, 0.5, 1, 1.5, 2, 3, and 5mg / L benzotriazole respectively, after being treated by a frequency conversion DC pulse electromagnetic water processor for 0.5h, the corrosion current density of brass was detected to be 0.84 , 0.27, 0.13, 0.11, 0.084, 0.12 and 0.095μA / cm 2 , the corrosion inhibition rates of benzotriazole with concentrations of 0.5, 1, 2, 3, and 5 mg / L on brass under this condition were calculated to be 67.9%, 84.5%, 86.9%, 90.0%, 85.7% and 88.7%, respectively. %;

[0032] The frequency conversion DC pulse electromagnetic water processor has a power supply of AC 220V, 50Hz, a working voltage of DC 10-15V, an output power of 100-300W, a frequency conversion range of 20Hz~75KHz, and a carrier frequency of 1MHz.

[0033] Compare by above-mentioned embodiment 1, embodiment 2 and embodiment 3, the result shows:

[0034] In the case of purely using benzotriazole without electromagnetic treatment, when the concentration of benzotria...

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Abstract

The invention discloses a method for improving the performance of a corrosion inhibitor in an industrial cooling water system. The method comprises the following steps: adopting an electromagnetic water processor, mounting a working induction coil of the electromagnetic water processor at a water inlet of heat exchanger equipment in the industrial cooling water system, and enabling the corrosion inhibitor in the industrial cooling water system to display better corrosion inhibiting performance under the action of electromagnetic fields. According to the method, the corrosion inhibitor can generate a synergized action by using the electromagnetic water processor to generate the electromagnetic fields, so that a better role in protecting heat-exchange surface metal can be played, and the usage amount of the corrosion inhibitor can be lowered, thus the aims of saving cost and reducing medicament emission are achieved.

Description

technical field [0001] The invention relates to a method for improving the performance of a corrosion inhibitor in an industrial cooling water system, belonging to the technical field of metal corrosion and protection. Background technique [0002] Scaling, corrosion, and microbial growth often occur in industrial circulating cooling water systems during operation, especially after the concentration ratio increases. These problems are particularly prominent. At present, the method of adding water treatment chemicals is usually used to control them. Corrosion inhibitors are an important part of water treatment chemicals in circulating cooling water systems. Usually, the corrosion inhibitors for copper alloys are adsorption-type corrosion inhibitors such as benzotriazole (BTA) and 2-mercaptobenzothiazole (MBT). The use concentrations are 2-3mg / L and 3-5mg / L respectively. Corrosion inhibitors for ferrous metals are passivating corrosion inhibitors such as molybdates and tungst...

Claims

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Application Information

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IPC IPC(8): C23F11/14C23F11/16C23F11/18C23F11/06
Inventor 葛红花金志浩韩建勋林薇薇张敏王学娟
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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