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

A protective agent, softening water technology, applied in the field of industrial water treatment, can solve problems such as material damage, and achieve the effects of improved peeling, good corrosion and scale inhibition, and not easy to decompose

Inactive Publication Date: 2007-12-19
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

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 phosphonate, 5 parts of hydroxyethylidene diphosphonic acid parts, 15 parts of 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, use a metering pump to successively weigh glycine dimethylene phosphonic acid, polyol phosphonic acid ester, hydroxyethylene diphosphonic acid and polymer zinc salt.

[0061] 2. Production: Turn on the vacuum pump, glycine dimethyl phosphonic acid, polyol phosphonic acid ester, 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 Under the condition of dividing, stir for 20 minutes; thereafter, add water and stir, then add...

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] ...

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Abstract

This invention discloses a carbon steel protectant for carbon steel used in open-loop water softening system. Said protectant is composed of: glycine-dimethyl phosphinic acid, polylol phosphonate hydroxyl ethylene diphosphoric acid, high molecular polymer zinc salt and water. This invention also discloses the application of said protectant. The utilization result shows: the invented protectant has obvious corrosion-resistance with corrosion rate of 0.025 mm/a, being of V5 of state standard. This invented protectant can be used in DO-rich and corrosion open-loop water softening system. The use of said protectant with its concentration of 20-120 mg/l can meet the requirement of corrosion-resistance. The use of said protectant can save great amount of water in recirculation water treatment system of thermodynamic installation or iron and steel plant or chemical industries, resulting excellent economic benefit and social benefit.

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 Applications(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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