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A hybrid corrosion inhibitor used in glycol water-based coolant

A technology of water-based cooling liquid and ethylene glycol, which is applied in the direction of heat exchange materials, chemical instruments and methods, and can solve the problems of limited types of cathodic corrosion inhibitors

Active Publication Date: 2020-06-26
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the types of cathodic corrosion inhibitors available so far are very limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0019] Example 1 In ethylene glycol-water-based cooling fluid, when the phosphoric acid ester is ethanolamine phosphate, the concentration is 50 mg / L; the organic azole is benzothiazole and mercaptobenzothiazole, each 50 mg / L, a total of 100 mg / L; pyrrolidone The compound is polyvinylpyrrolidone, the concentration is 50mg / L; the borate is sodium borate, the concentration is 100mg / L; The corrosion inhibition rate of steel, copper and its alloys, and solder is 80%; the corrosion inhibition rate of aluminum alloy and cast aluminum is greater than 85%; the corrosion inhibition rate of stainless steel is greater than 90%, and no stainless steel, aluminum alloy, or cast aluminum pitting.

example 2

[0020] Example 2 In ethylene glycol-water-based cooling fluid, when the phosphoric ester is ethanolamine phosphate, the concentration is 200mg / L; the organic azole is benzothiazole and mercaptobenzothiazole, each 200mg / L, and the total concentration is 400mg / L ;Pyrrolidone is polyvinylpyrrolidone compound, the concentration is 100mg / L; borate is sodium borate, the concentration is 300mg / L; , carbon steel reaches 90%, the corrosion inhibition rate of copper and its alloys and solder drops to 75%, the corrosion inhibition rate of aluminum alloy, cast aluminum and stainless steel is greater than 95%, and there is no pitting corrosion, but the solution has precipitation . This may be because the amount of sodium borate and cerium nitrate is too high, which promotes the corrosion of non-passive metal copper and its alloys, and solder.

example 3

[0021] Example 3 In ethylene glycol-water-based coolant, when the phosphoric acid ester is ethanolamine phosphate, the concentration is 200mg / L; the organic azole is benzothiazole and mercaptobenzothiazole, each of which is 200mg / L, and the concentration is 400mg / L in total. L; polyvinylpyrrolidone compound, the concentration is 200mg / L; borate is sodium borate, the concentration is 50mg / L; cerium salt is nitrate, and the valence state of cerium is +3, when the concentration is 5mg / L, The solution produced no precipitate. In this case, the corrosion inhibition rate of carbon steel reaches 85%, the corrosion inhibition rate of copper and its alloys and solder reaches 90%, the corrosion inhibition rate of aluminum alloy, cast aluminum and stainless steel reaches 95%, and there is no pitting corrosion.

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PUM

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Abstract

The invention discloses a mixed corrosion inhibitor used in an ethylene glycol water-based cooling solution. The mixed corrosion inhibitor used in the ethylene glycol water-based cooling solution is characterized by adding the following substances to form a mixed solution in a mixed solution with volume ratio of ethylene glycol to water being 65 / 35, and the concentration of each substance in the mixed solution is as follows: ethanolamine phosphate with a concentration range of 50-200 mg / L; an organic azole compound is prepared by mixing benzothiazole and mercapto with the mass ratio of 1:1; and the total concentration is 100-400 mg / L, wherein the concentration of polyvinyl pyrrolidone is 50-200 mg / L, the concentration of sodium borate is 100-300 mg / L, and the concentration of cerium nitrate is controlled at 3-10 mg / L. The organic-inorganic composite cathode-anode mixed corrosion inhibitor is used to prevent the corrosion of an electronic liquid cooling system consisting of copper and copper alloy, aluminum alloy, carbon steel, stainless steel and other multi-metal materials in the ethylene glycol water-based cooling solution.

Description

technical field [0001] The invention belongs to the use of an organic-inorganic composite cathode and anode hybrid corrosion inhibitor to prevent the electronic liquid cooling system composed of multi-metal materials such as copper and its alloys, aluminum alloys, carbon steel, and stainless steel materials from ethylene glycol-water-based cooling. Corrosion technology in liquid. Background technique [0002] Liquid cooling systems are widely used in transportation vehicles, electromechanical equipment, air conditioners, high-power electrical and other fields and equipment. Today, with the rapid development of electronic integrated circuit technology and the wide application of electronic chips, the integration of electromechanical equipment, electrical and electronic equipment is getting higher and higher. Operational impacts are also becoming more prominent. For this reason, designing and establishing an electronic liquid cooling system plays a major role in ensuring the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/10C23F11/18C09K5/10
CPCC09K5/10C23F11/10C23F11/187
Inventor 雍兴跃张小明杨健陈振宁程普强张新全潘金杰周林陈日辉何祯齐社红史亚南
Owner BEIJING UNIV OF CHEM TECH