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Corrosion-and scaling-inhibiting water treating agent

A water treatment agent, corrosion and scale inhibition technology, applied in the field of water treatment, can solve problems such as cumbersome procedures, corrosion, and phosphorus-containing pollution of the environment, and achieve the effect of inhibiting localized corrosion

Inactive Publication Date: 2003-08-13
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once these prefabricated precipitation films are partially damaged, local corrosion that is difficult to suppress will occur in this part, and pre-film treatment must be done again. However, the on-site pre-film treatment, especially the process of re-pre-film treatment, is often relatively cumbersome.
Simultaneously, these water treatment agents also have a large amount of use, and have defects such as phosphorus-containing environmental pollution and higher prices (Zhou Bensheng, "Industrial Water Treatment", Chemical Industry Press, 1997)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1- example 3

[0019] Example 1 and Example 3 are the composition and content of the corrosion and scale inhibitor of the present invention, see formula A and formula C in Table 1 respectively. Wherein the formula B in the example 2 does not contain the dielectric hydrophobic substance, but is replaced by the chromate corrosion inhibitor and the organic phosphine corrosion and scale inhibitor.

example 4- example 18

[0021] This example is the experimental situation of adding the corrosion and scale inhibitor of the present invention in distilled water and different metal samples under different temperature and static or dynamic circulation concentration conditions. The experimental conditions and results are shown in Table 3. The performance evaluation test in the example is carried out in accordance with the "Cooling Water Analysis and Test Method" compiled by the Production Department and Development Department of Sinopec Corporation in 1993.

example 19- example 33

[0023] This example is the experimental situation of adding the corrosion inhibitor of the present invention to raw water 1 (see Table 2 for performance) and different metal samples at different temperatures and static or dynamic cycle concentration conditions. The experimental conditions and results are shown in Table 4.

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PUM

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Abstract

A corrosion-inhibiting and scale-inhibiting agent for treating the water used as circulated cooling water or for boiler is prepared from liquid-state dielectric hydrophobic substance, oil-soluble corrosion inhibitor, water-soluble disperser, and composite sensitive emulsifier. Its advantages are high effect and low dosage.

Description

technical field [0001] The invention belongs to water treatment technology, and more specifically relates to a corrosion and scale inhibitor used in industrial circulating cooling water and boiler water systems and a treatment method thereof. Background technique [0002] The water treatment agents currently used in industrial circulating cooling systems or boiler water systems mainly include corrosion inhibitors, scale inhibitors and dispersants, etc., and the types of corrosion inhibitors include chromate, nitrite, silicate, molybdate, zinc Salt, phosphate, polyphosphate, organic phosphonate, mercaptobenzothiazole (MBT), benzotriazole (BTA), etc.; types of scale inhibitors and dispersants include polyphosphate, organic phosphoric acid, phosphine carboxylic acid, organic Phosphate, polycarboxylate, etc. These water treatment agents exist in the form of solution in the water body, and they need to be prefabricated with a special precipitation film on the surface of the meta...

Claims

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Application Information

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IPC IPC(8): C02F5/10C11C1/04
Inventor 万平玉庞然孙心利杨晓波陈咏梅刘小光
Owner BEIJING UNIV OF CHEM TECH
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