Corrosion inhibitor, method and application for closed soft water circulating cooling water system

A technology for cooling water systems and corrosion inhibitors, applied in chemical instruments and methods, water/sludge/sewage treatment, descaling and water softening, etc., can solve the problems of reduced scaling and strong corrosion, and achieve slow Excellent corrosion performance, high-efficiency corrosion inhibition performance, and obvious technical advantages

Active Publication Date: 2021-01-08
北京拓凯化工技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although soft water removes most of the hardness to greatly reduce the scaling of water, it is still highly corrosive. For this reason, it is necessary to add corrosion inhibitors to the cooling water

Method used

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  • Corrosion inhibitor, method and application for closed soft water circulating cooling water system
  • Corrosion inhibitor, method and application for closed soft water circulating cooling water system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The production technology of corrosion inhibitor of the present invention is introduced as follows:

[0025] 1.1 Preparation of materials: According to the formula ratio, quantitatively weigh 5-50 parts of triethanolamine borate, 5-50 parts of ascorbic acid, 5-50 parts of urotropine, 1-10 parts of benzotriazole, and 1-10 parts of sodium hydroxide parts, 10-80 parts of water.

[0026] 1.2 Production: Add water into the reaction kettle, start stirring, add triethanolamine borate, ascorbic acid, urotropine, benzotriazole, sodium hydroxide, water, continue stirring for about 20 minutes after dissolving, and mix well Subpackage to obtain the preparation of the present invention.

Embodiment 2

[0028] The production technology of corrosion inhibitor of the present invention is introduced as follows:

[0029] 2.1 Material preparation: according to the formula ratio, quantitatively weigh 5-50 parts of triethanolamine borate, 5-50 parts of ascorbic acid, 5-50 parts of urotropine, 1-10 parts of benzotriazole, and 1-10 parts of sodium hydroxide parts, 10-80 parts of water.

[0030] 2.2 Production: Add water into the reaction kettle, start stirring, add triethanolamine borate, benzotriazole, sodium hydroxide, continue to stir for about 20 minutes after dissolving, mix well and pack to become preparation A; mix ascorbic acid , urotropine, and water were added to the reaction kettle, stirred and dissolved, then continued to stir for about 20 minutes, mixed evenly, and subpackaged to become preparation B; that is, the composition preparation of the present invention was obtained.

Embodiment 3

[0032] The invention is used for the corrosion inhibitor of the closed soft water circulation cooling water of the blast furnace, and the corrosion inhibition performance test is carried out for a certain water quality.

[0033] 3.1 Test conditions

[0034] Test water quality: test water is a blast furnace in Hebei area; water quality stabilizer: the invention, used as a corrosion inhibitor for the closed soft water circulation cooling water system of blast furnace, and the addition amount is 200mg / L commercial concentration of the preparation; test water temperature: 50± 1°C; linear speed of test piece: 75r / min; distance between top of test piece and liquid surface: greater than 2cm; specification and surface area of ​​test piece: 50×25×2mm, 28cm 2 ;Test time: 120 hours; Number of test pieces: three pieces in each cup; Test piece material: A3 carbon steel, stainless steel, copper.

[0035] 3.2 Test method

[0036]Refer to the GB / T18175-2000 standard "Determination of Corros...

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Abstract

The invention discloses a corrosion inhibitor for a closed soft water circulating cooling water system and an application. Anti-corrosion protection is carried out on thermal equipment, so that the service life of system equipment in a closed soft water circulating cooling water environment is effectively prolonged. The corrosion inhibitor has the characteristics of being efficient, phosphorus-free and environment-friendly. The corrosion inhibitor is characterized by comprising a steel corrosion inhibitor and a copper corrosion inhibitor, wherein the steel corrosion inhibitor comprises triethanolamine borate, ascorbic acid and urotropine; and the copper corrosion inhibitor comprises benzotriazole.

Description

technical field [0001] The present invention relates to industrial water treatment technology, for example, the water treatment technology properly adopted for the circulating cooling water of blast furnaces, hot blast stoves and other heat exchange equipment, especially a corrosion inhibitor and method for closed soft water circulating cooling water system And application, in order to carry out anti-corrosion protection to the thermal equipment, thus effectively prolong the service life of the system equipment in the closed soft water circulating cooling water environment. The corrosion inhibitor of the invention has the characteristics of high efficiency, phosphorus-free and environmental protection. Background technique [0002] Today, the world is facing crises such as population growth, deterioration of the ecological environment, and water shortages. The scarcity and pollution of water resources pose a threat to social stability and economic development, and become one...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F5/12C23F11/10
CPCC02F5/125C23F11/10
Inventor 史玉刘雪冬赵士学宋焕明
Owner 北京拓凯化工技术有限公司
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