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Boiler water-feeding multifunctional corrosion inhibitor and preparation method thereof

A technology of boiler feed water and corrosion inhibitor, which is applied in the field of multifunctional corrosion inhibitor and multifunctional corrosion inhibitor for boiler feed water treatment. Good effect, high oxygen removal efficiency, and low toxicity

Inactive Publication Date: 2011-09-14
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the oxygen removal measures currently adopted have a single function and cannot slow down corrosion from the perspective of changing the environmental conditions where corrosion occurs. The corrosion inhibition effect on the corroded boiler surface is poor

Method used

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  • Boiler water-feeding multifunctional corrosion inhibitor and preparation method thereof
  • Boiler water-feeding multifunctional corrosion inhibitor and preparation method thereof
  • Boiler water-feeding multifunctional corrosion inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Boiler feed water multifunctional corrosion inhibitor of the present invention, its batching weight percentage is composed of:

[0030]

[0031] The above ingredients are composed according to weight percentage, and carbohydrazide, n-butylamine, and cetylamine are added to deionized water in sequence, and stirred at room temperature for 20 minutes to fully dissolve, and then the multifunctional corrosion inhibitor for boiler feed water is obtained. .

[0032] The experimental results show that the deoxidation rate of the multifunctional corrosion inhibitor for boiler feed water prepared according to the above formula is 90%, and the corrosion inhibition rate is 89.9%.

Embodiment 2

[0034] Boiler feed water multifunctional corrosion inhibitor of the present invention, its batching weight percentage is composed of:

[0035]

[0036] Wherein the oligomerization content of carbohydrazide and its oligomers with a degree of polymerization not exceeding 5 is 13%.

[0037] The above ingredients are composed according to weight percentage, carbohydrazide and its oligomers, tert-butylamine, and octadecylamine are added to deionized water in sequence, and stirred at room temperature for 20 minutes to fully dissolve, that is, boiler feed water multifunctional Corrosion inhibitor.

[0038] The experimental results show that the deoxidation rate of the boiler feed water multifunctional corrosion inhibitor prepared according to the above formula is 93%, and the corrosion inhibition rate is 90.2%.

Embodiment 3

[0040] Boiler feed water multifunctional corrosion inhibitor of the present invention, its batching weight percentage is composed of:

[0041]

[0042] Wherein the oligomerization content of carbohydrazide and its oligomers with a degree of polymerization not exceeding 5 is 13%.

[0043] The above ingredients are composed according to weight percentage, carbohydrazide and its oligomers, triethanolamine and hexadecylamine are added to deionized water in sequence, and stirred at room temperature for 20 minutes to fully dissolve, that is, boiler feed water Functional corrosion inhibitor.

[0044] The experimental results show that the deoxidation rate of the boiler feed water multifunctional corrosion inhibitor prepared according to the above formula is 97%, and the corrosion inhibition rate is 93.7%.

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Abstract

The invention relates to a boiler water-feeding multifunctional corrosion inhibitor and a preparation method thereof, belonging to the technical field of chemical products. The corrosion inhibitor comprises the following compositions in percentage by weight: 10 to 15 percent of carbohydrazide and oligomers thereof, 12 to 18 percent of organic amine pH value regulators, 15 to 20 percent of vapor phase film-forming corrosion inhibitors, and the balance of deionized water. The corrosion inhibitor provided by the invention shows a good synergistic effect, and the corrosion inhibiting purpose is achieved through various ways, such as deoxidizing, pH value regulation, vapor phase corrosion inhibiting and the like, so that the products are endowed with excellent corrosion inhibiting performance; and the corrosion inhibitor is applicable to wider temperature and pH value ranges, and has good industrial application prospect.

Description

technical field [0001] The invention relates to a multifunctional corrosion inhibitor, in particular to a multifunctional corrosion inhibitor used for boiler feed water treatment, and belongs to the technical field of chemical products. Background technique [0002] Corrosion problems caused by poor water quality in boiler thermal equipment seriously endanger its safety and stable operation. The existence of dissolved oxygen in water is the main cause of corrosion. By using a high-efficiency deaerator or adding a chemical deoxidizer, the concentration of dissolved oxygen in boiler water can be effectively reduced, and the occurrence of oxygen corrosion can be inhibited and slowed down to a certain extent. However, the oxygen removal measures currently adopted have a single function and cannot slow down corrosion from the perspective of changing the environmental conditions where corrosion occurs. The corrosion inhibition effect on the corroded boiler surface is poor. [000...

Claims

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Application Information

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IPC IPC(8): C23F11/14C02F5/12
Inventor 赵杉林姜恒王仲贤李萍李长波李飞潘振金英杰沈红新
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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