Carbon steel protectant for open-circuit water softening system and preparation method and application thereof

A protective agent and water softening technology, which is applied in the field of industrial water treatment, can solve problems such as material damage, and achieve the effects of improved peeling, good corrosion inhibition performance, and good chlorine oxidation resistance

Inactive Publication Date: 2009-07-22
北京能泰高科环保技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the material is not compatible with its environment and its interface, corrosion will continue and eventually lead to the damage of the material

Method used

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  • Carbon steel protectant for open-circuit water softening system and preparation method and application thereof
  • Carbon steel protectant for open-circuit water softening system and preparation method and application thereof
  • Carbon steel protectant for open-circuit water softening system and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Copper pipe protector (TWZL-001) for open circuit softening water system, containing the following components (kg): 25 parts of glycine dimethylphosphonic acid, 5 parts of polyol phosphate, 5 parts of hydroxyethylidene diphosphonic acid , 15 parts of high molecular polymer zinc salt and 50 parts of water.

[0059] The preparation method of this carbon steel protective agent is:

[0060] 1. Raw material preparation: According to the above-mentioned formula ratio, weigh glycine dimethylene phosphonic acid, polyol phosphate, hydroxyethylene diphosphonic acid and polymer zinc salt in sequence with a metering pump.

[0061] 2. Production: Turn on the vacuum pump, and glycine dimethylphosphonic acid, polyol phosphate, and hydroxyethylene diphosphonic acid will be pumped into the reaction kettle. When the reaction temperature is 40-50°C, the stirring speed is 80 rpm Stir for 20 minutes under certain conditions; after that, add water and stir, then add high-molecular polymer z...

Embodiment 2

[0063] Corrosion inhibition experiment of the corrosion inhibitor (TWZL-001) of the present invention on carbon steel.

[0064] 2.1 Purpose of the experiment.

[0065] The method of rotating coupon corrosion test is to evaluate the corrosion inhibition performance of water treatment agent by calculating the corrosion rate and corrosion inhibition rate by using the loss mass of the test piece under the given conditions in the laboratory. The corrosion characteristics of the open-circuit demineralized water system are investigated by using the rotating coupon corrosion measurement method, and the corrosion inhibition performance of the product of the present invention is comprehensively evaluated by indicators such as the appearance color change of the carbon steel after the test, and the corrosion rate measured by the weight loss method.

[0066] 2.2 Experimental conditions.

[0067] Experimental water quality: The experimental water is provided by a continuous casting net rin...

Embodiment 3

[0093] The comparative experiment of the corrosion inhibition performance of the composition of the present invention, that is, the carbon steel protective agent and other corrosion inhibitors.

[0094] 3.1 Purpose of the experiment.

[0095] Carry out the carbon steel corrosion inhibition test for different corrosion inhibitors, still utilize the rotating coupon corrosion measurement method, adopt the same soft water system, and judge the corrosion inhibition performance of the present invention by comparison.

[0096] 3.2 Experimental conditions and experimental procedures.

[0097] Same as 2.2 and 2.3.

[0098] 3.3 Experimental conclusion.

[0099] The following table is the test results of the present invention and other similar corrosion inhibitors on carbon steel surface.

[0100] Table 4 Comparison of carbon steel corrosion rates under different corrosion inhibitors. Scale and corrosion inhibitor B is a composition of different important components

[0101]

[0...

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Abstract

The invention discloses a carbon steel protective agent for an open-circuit softening water system, a preparation method and an application thereof. The carbon steel protective agent is composed of the following components: glycine dimethyl phosphonic acid, polyol phosphate, hydroxyethylene diphosphonic acid, polymer zinc salt and water. The invention also provides the application of the carbon steel protective agent. The results show that the carbon steel protective agent has a significant corrosion inhibition effect, and the corrosion rate of carbon steel is only 0.025mm / a, which is only equivalent to 1 / 5 of the national standard. The product of the present invention is suitable for the open-circuit demineralized water system rich in dissolved oxygen and easy to corrode. The corrosion inhibitor dosage of the present invention only needs 20-120mg / l to meet the requirement of corrosion inhibition. In the treatment of circulating water with high corrosion of thermal equipment And in the steel system or the circulating water treatment system in the chemical industry, it greatly saves industrial water consumption and economic costs, and has good economic and social benefits.

Description

technical field [0001] The invention relates to the technical field of industrial water treatment, in particular to a corrosion inhibition technology used in circulating cooling water systems in the fields of electric power and thermal power to prevent corrosion of pipelines and equipment, especially a kind of anti-corrosion technology used in open circuit softened water systems Carbon steel protective agent and its preparation method and application. Background technique [0002] Today, the world is facing crises such as population growth, deterioration of the ecological environment, and shortage of water resources. The scarcity and pollution of water resources pose a threat to social stability and economic development, and have become one of the most prominent problems facing the stability and development of most countries in the world. Saving It is imperative to improve the utilization rate of water resources. To save water, we must first seize the relatively concentrate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/10
Inventor 刘彦华刘雪冬王永梅宋焕明杨彬杜雪梅王鑫
Owner 北京能泰高科环保技术有限公司
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