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Scale and corrosion inhibitor

A scale and corrosion inhibitor, the technology of weight percentage, applied in the field of scale and corrosion inhibitor, can solve the problems of single component, poor scale removal effect, harm to human life, etc.

Inactive Publication Date: 2015-06-24
曲其飞
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The use of circulating water in industry is beneficial to save the cost of enterprises and improve the benefits of enterprises. However, there will be two problems in the process of using circulating water. One is the evaporation of water, which causes the crystallization and precipitation of salts. The most common ones are Calcium carbonate, calcium silicate and other scales, the existence of scales greatly reduces the heat transfer efficiency, and the second is the electrochemical corrosion of circulating water on the equipment. Human life, at present, scale and corrosion inhibitors are added to circulating water to reduce the appearance of scale, but the ingredients of scale and corrosion inhibitors on the market are single, and the descaling effect is not good, especially for circulating water with high hardness and high pH The processing effect is not good, which is the deficiency of the existing technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A scale and corrosion inhibitor, consisting of the following components by weight percentage:

[0051] 2 polyamino polyether methylene phosphonic acid 40%

[0052] Hexamethylene diamine tetramethylene phosphonic acid 10%

[0053] Bis-1,6-hexamethylenetriaminepentamethylenephosphonic acid 10%

[0054] Polyacrylic acid 1%

[0055] Zinc sulfate 5%

[0056] The rest is water.

[0057] Calcium hardness of raw water (calculated as calcium carbonate) is 295mg / L, pH is 11, 30mg / L scale and corrosion inhibitor is added, and the adhesion speed of carbon steel experimental tube is 6.11mcm and the corrosion speed is 0.011mm / a through the detection of heat exchanger. . The corrosion rate of stainless steel is 0.0001131mm / a.

Embodiment 2

[0059] A scale and corrosion inhibitor, consisting of the following components by weight percentage:

[0060] Polyamino polyether methylene phosphonic acid 42.5%

[0061] Hexamethylenediamine tetramethylene phosphonic acid 11.3%

[0062] Bis-1,6-hexamethylenetriaminepentamethylenephosphonic acid 12.5%

[0063] Polyacrylic acid 1.2%

[0064] Zinc sulfate 5.6%

[0065] The rest is water.

[0066] The calcium hardness of the raw water (calculated as calcium carbonate) is 295mg / L, the pH is 11, and 30mg / L of scale and corrosion inhibitors are added. The adhesion speed of the carbon steel experimental tube is 5.89mcm and the corrosion speed is 0.00965mm / a through the detection of the heat exchanger. . The corrosion rate of stainless steel is 0.0000985mm / a.

Embodiment 3

[0068] A scale and corrosion inhibitor, consisting of the following components by weight percentage:

[0069] Polyamino polyether methylene phosphonic acid 44.3%

[0070] Hexamethylenediamine tetramethylene phosphonic acid 12.5%

[0071] Bis-1,6-hexamethylenetriaminepentamethylenephosphonic acid 14.9%

[0072] Polyacrylic acid 1.5%

[0073] Zinc sulfate 6.3%

[0074] The rest is water.

[0075] Raw water calcium hardness (calculated as calcium carbonate) is 295mg / L, PH is 11, and 30mg / L scale and corrosion inhibitor is added. The adhesion speed of carbon steel experimental tube is 5.59mcm and the corrosion speed is 0.00932mm / a through the detection of heat exchanger. . The corrosion rate of stainless steel is 0.0000934mm / a.

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Abstract

The invention relates to the technical field of corrosion inhibitors, and concretely relates to a scale and corrosion inhibitor. The scale and corrosion inhibitor comprises 40-50wt% of polyamino polyether methylene phosphonae, 10-15wt% of hexamethylene diamine tetramethylene phosphonic acid, 10-20wt% of bis-1,6-hexamethylene triamine pentamethylene phosphonic acid, 1-3wt% ofpolyacrylic acid , 5-10wt% of zinc sulfate, and the balance water. The scale and corrosion inhibitor has a substantial effect on circulating water with high hardness and high pH value, and allows the adherence speed of carbon steel experiment tubes to be reduced 5.59mcm, the corrosion speed of carbon steel to be reduced 0.00932mm / a and the corrosion speed of stainless steel to be reduced to 0.0000934mm / a.

Description

technical field [0001] The invention relates to the technical field of corrosion inhibitors, in particular to a scale and corrosion inhibitor. Background technique [0002] The use of circulating water in industry is beneficial to save the cost of enterprises and improve the benefits of enterprises. However, there will be two problems in the process of using circulating water. One is the evaporation of water, which causes the crystallization and precipitation of salts. The most common ones are Calcium carbonate, calcium silicate and other scales, the existence of scales greatly reduces the heat transfer efficiency, and the second is the electrochemical corrosion of circulating water on the equipment. Human life, at present, scale and corrosion inhibitors are added to circulating water to reduce the appearance of scale, but the ingredients of scale and corrosion inhibitors on the market are single, and the descaling effect is not good, especially for circulating water with hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F5/14C23F11/173
Inventor 曲其飞范立泽林峰蒲洪涛
Owner 曲其飞
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