Efficient scale corrosion inhibitor for carbon steel system

A scale and corrosion inhibitor, high-efficiency technology, applied in the direction of complex / solubilizer treatment, etc., can solve the problems of poor scale inhibition ability, corrosion and scaling of carbon steel system, scale inhibition ability and corrosion inhibition ability can not be considered at the same time, etc. , achieve scientific and reasonable formula, high corrosion and scale inhibition, and solve the effect of corrosion and scaling problems

Inactive Publication Date: 2009-04-22
WUHAN HAILI TECH CHEM
View PDF2 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to the high salt content in industrial circulating water, which has corrosive and scaling ions, the carbon steel system has severe corrosion and scaling during operation. At present, the scale and corrosion inhibitors used in carbon steel systems in various industries have the following three types: Insufficiency in one aspect: First, the dosage is large, the minimum dosage is not less than 80mg/l, and the general dosage is 120mg/l, so that the operating cost remains high; second, the scale and

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] Example 1, get 10% of aminotrimethylene phosphonic acid, 30% of hydrolyzed polymaleic anhydride, 40% of sodium acrylic acid propylene sulfonate copolymer, 7.5% of sodium gluconate, 2.5% of borax, 2% of zinc chloride, 8% of water, Sequentially put into the reaction kettle and stir evenly to obtain the scale and corrosion inhibitor.

[0017] Take the scale and corrosion inhibitor in Example 1, and use ordinary carbon steel for corrosion test. The water quality of the test water sample: pH7.27 Alkalinity 2.55mmol / l Hardness 5.51mmol / l Calcium ion 155.75mg / l Chloride ion 110mg / 1.50℃ , Rotate the coupon for 96 hours, and the dosage is 20mg / l. The test result shows that the corrosion rate is 0.07 mm / year.

example 2

[0018] Example 2, get 10% of aminotrimethylene phosphonic acid, 30% of hydrolyzed polymaleic anhydride, 40% of sodium acrylate propylene sulfonate copolymer, 7.5% of sodium gluconate, 2.5% of borax, 2% of zinc sulfate, and 8% of water, followed by Throw it into the reaction kettle and stir evenly to obtain the scale and corrosion inhibitor.

[0019] Take the scale and corrosion inhibitor in Example 1, and use ordinary carbon steel for corrosion test. The water quality of the test water sample: pH7.27 Alkalinity 2.55mmol / l Hardness 5.51mmol / l Calcium ion 155.75mg / l Chloride ion 110mg / 1.50℃ , Rotate the coupon for 96 hours, and the dosage is 20mg / l. The test result shows that the corrosion rate is 0.07 mm / year.

example 3

[0020] Example 3, get hydroxyethylidene diphosphonic acid 10%, maleic acid acrylic acid copolymer (MB) 30%, AMPS terpolymer 20%, gluconic acid 7.5%, borax 4%, zinc chloride 8%, water 21.5% %, put into the reaction kettle and stir evenly to obtain the scale and corrosion inhibitor.

[0021] Take the scale and corrosion inhibitor of Example 3, and use ordinary carbon steel for corrosion test. The test water sample is the same as Example 1.50°C, rotate the coupon for 96 hours, and the dosage is 20 mg / l. The test result is that the corrosion rate is 0.06 mm / year.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a high-efficiency scale and corrosion inhibitor for a carbon steel system, and relates to an agent which is used for industrial recirculated cooling water and can inhibit scale and corrosion. The scale and corrosion inhibitor consists of organic phosphonate substances, polycarboxylic acid substances, acrylic acid copolymer substances, polyhydroxycarboxylic acid or sodium salt of the polyhydroxycarboxylic acid, borax, zinc salt and water. The scale and corrosion inhibitor has scientific and reasonable formulas, contains the organic phosphonate substances, the polycarboxylic acid substances and acrylic acid copolymers which have the function of scale inhibition, and also contains substances such as gluconic acid sodium salt, the borax and the zinc salt which have the function of corrosion inhibition; and a preparation of the scale and corrosion inhibitor has higher functions of scale and corrosion inhibition, and can solve corrosion and scaling problems of the carbon steel system. After the prior carbon steel adopts the scale and corrosion inhibitor, the corrosion rate is between 0.05 and 0.07mm/y, and the scale inhibiting rate is between 97.5 and 99 percent. The scale and corrosion inhibitor has simple production and can be obtained by sequentially adding various raw materials into a reaction kettle according to various formulas to stir evenly.

Description

technical field [0001] The invention relates to an antiscaling and corrosion inhibiting preparation for industrial circulating cooling water. Background technique [0002] Due to the high salt content in industrial circulating water, which has corrosive and scaling ions, the carbon steel system has severe corrosion and scaling during operation. At present, the scale and corrosion inhibitors used in carbon steel systems in various industries have the following three types: Insufficiency in one aspect: First, the dosage is large, the minimum dosage is not less than 80mg / l, and the general dosage is 120mg / l, so that the operating cost remains high; second, the scale and corrosion inhibition capabilities cannot be considered at the same time, Good scale inhibition ability has poor corrosion inhibition ability, and good corrosion inhibition ability has poor scale inhibition ability. Third, the currently commercially available carbon steel scale and corrosion inhibitors all conta...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C02F5/08
Inventor 古宁谭代成漆全勇
Owner WUHAN HAILI TECH CHEM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap