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Low-phosphorus corrosion inhibitor for steam condenser

A corrosion inhibitor and condenser technology, applied in chemical instruments and methods, water/sludge/sewage treatment, descaling and water softening, etc., can solve problems such as limitations, and achieve low phosphorus content and corrosion inhibition effect excellent effect

Inactive Publication Date: 2013-03-27
王忠举
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the long run, the application of pure phosphorus water treatment corrosion inhibitors will be limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A low-phosphorus corrosion inhibitor for condensers consists of the following components in parts by mass:

[0023] 2-Phospho-1,2,4-tricarboxylic butane 8

[0024] Hydrolyzed Polymaleic Anhydride 50

[0025] Polyaspartic Acid 40.

[0026] In this example:

[0027] The average molecular weight of the polyaspartic acid is 10000;

[0028] The hydrolyzed polymaleic anhydride has an average molecular weight of 800 and a solid content of >48%.

Embodiment 2

[0030] A low-phosphorus corrosion inhibitor for condensers consists of the following components in parts by mass:

[0031] 2-Phospho-1,2,4-tricarboxylic butane 3

[0032] Hydrolyzed Polymaleic Anhydride 20

[0033] polyaspartic acid 15.

[0034] In this example:

[0035] The average molecular weight of the polyaspartic acid is 8000;

[0036] The hydrolyzed polymaleic anhydride has an average molecular weight of 400 and a solid content of >48%.

Embodiment 3

[0038] A low-phosphorus corrosion inhibitor for condensers consists of the following components in parts by mass:

[0039] 2-Phospho-1,2,4-tricarboxylic butane 5

[0040] Hydrolyzed polymaleic anhydride 35

[0041] polyaspartic acid 25 .

[0042] In this example:

[0043] The polyaspartic acid has an average molecular weight of 9000;

[0044] The hydrolyzed polymaleic anhydride has an average molecular weight of 600 and a solid content of >48%.

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PUM

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Abstract

The invention provides a low-phosphorus corrosion inhibitor for a steam condenser, which comprises the following components in parts by weight: 1-5 parts of 2-phospho-1,2,4- tricarboxylic acid butane, 15-35 parts of hydrolytic polymaleic anhydride and 20-30 parts of polyaspartic acid, wherein the average molecular weight of the polyaspartic acid is 8000-10000, the average molecular weight of the hydrolytic polymaleic anhydride is 400-800, and the solid content of the hydrolytic polymaleic anhydride is more than 48%.

Description

technical field [0001] The invention relates to a metal corrosion inhibitor, in particular to a low-phosphorus corrosion inhibitor for a condenser. Background technique [0002] The corrosion of the condenser will not only cause the loss of a large amount of precious metals, but more importantly, many scaling and corrosion problems of power equipment are caused by the corrosion of the copper tube of the condenser. Many condensers use metal alloy tubes. Due to the influence of various factors such as the circulating water medium in the tubes, the metal alloy tubes of the condensers are corroded to varying degrees. Once the metal alloy tube of the condenser is corroded and perforated, the water quality of the feed water will be seriously polluted, resulting in serious consequences of corrosion, scaling, and even tube explosion of the cooling water wall tube. If the metal alloy tube is corroded and damaged in a large area, the consequences will be disastrous. [0003] At pres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/173C02F5/14
Inventor 王忠举
Owner 王忠举
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