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Supermolecule corrosion inhibitor for copper and copper alloy and high-speed mixing preparation method thereof

A corrosion inhibitor and supramolecular technology, applied in the field of corrosion inhibitor of copper and its alloys and its high-speed stirring preparation, can solve the problem that the effect is not fully manifested, and achieve excellent anti-corrosion effect, strong universality, and water solubility. sex effect

Inactive Publication Date: 2014-02-26
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the role of supramolecular chemistry theory in the field of metal corrosion and protection technology, especially in the field of corrosion inhibitors has not been fully reflected

Method used

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  • Supermolecule corrosion inhibitor for copper and copper alloy and high-speed mixing preparation method thereof
  • Supermolecule corrosion inhibitor for copper and copper alloy and high-speed mixing preparation method thereof
  • Supermolecule corrosion inhibitor for copper and copper alloy and high-speed mixing preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] At a stirring rate of 300rpm, mix 15g of β-cyclodextrin and 48ml of water at 60°C. After completely dissolving, continue stirring for 30min; mix 3.8g of benzothiazole and 10mL of absolute ethanol, and then slowly pour into In the cyclodextrin solution, the temperature is then controlled at 40°C, and the stirring rate is adjusted to 1000rpm and stirred for 1 hour to obtain a homogeneous system, that is, to obtain a supramolecular corrosion inhibitor for copper and its alloys. The corrosion inhibitor is β with a hydrophobic cavity. -Cyclodextrin and benzothiazole are induced by absolute ethanol and bonded through weak intermolecular interactions to form clathrates with a supramolecular structure.

[0024] Put the above-mentioned supramolecular corrosion inhibitors of copper and its alloys into industrial condensed water in amounts of 20, 40, and 60 mg / L respectively, and the electrochemical polarization curve of the copper electrode is as follows: image 3 shown. Put the...

Embodiment 2

[0026] At a stirring rate of 500rpm, mix 18g of methyl-β-cyclodextrin and 40ml of water at 50°C, and continue stirring for 10min after completely dissolving; mix 5.6g of benzimidazole and 7mL of ethylene glycol, and then slowly Pour into the methyl-β-cyclodextrin solution, then control the temperature at 60°C, and adjust the stirring speed to 800rpm and stir for 2 hours to obtain a homogeneous system, that is, to obtain a supramolecular corrosion inhibitor for copper and its alloys, the corrosion inhibitor It is an inclusion compound with a supramolecular structure formed by methyl-β-cyclodextrin with a hydrophobic cavity and benzimidazole induced by ethylene glycol and combined through weak intermolecular interactions.

[0027] The supramolecular corrosion inhibitor of copper and its alloys prepared above is put into industrial condensate water and circulating cooling water in an amount of 20mg / L, and the corrosion rate of copper and its alloys is less than 0.005mm / a.

Embodiment 3

[0029] At a stirring rate of 450rpm, mix 10g of hydroxypropyl-β-cyclodextrin and 23mL of water at 45°C, and continue stirring for 30min after completely dissolving; mix 2.8g of benzotriazole with 3.8mL of glycerin Uniform, then slowly added to the hydroxypropyl-β-cyclodextrin solution, then the temperature was controlled at 55°C, and the stirring rate was adjusted to 1200rpm and stirred for 0.5h to obtain a homogeneous system, that is, supramolecular corrosion inhibition of copper and its alloys agent, the corrosion inhibitor is hydroxypropyl-β-cyclodextrin with a hydrophobic cavity and benzotriazole induced by glycerol and combined with a weak interaction between molecules to form a supramolecular structure clathrate.

[0030] The supramolecular corrosion inhibitor of copper and its alloys prepared above is put into industrial condensate water and circulating cooling water in an amount of 30mg / L, and the corrosion rate of copper and its alloys is less than 0.005mm / a.

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Abstract

The invention discloses a supermolecule corrosion inhibitor for copper and copper alloy and a high-speed mixing preparation method thereof, belonging to the technical field of metal corrosion and protection. The supermolecule corrosion inhibitor comprises the following components in parts by mass: 20-30 parts of a cyclodextrin derivative, 5-10 parts of an organic imidazole compound, 10-20 parts of an inducer and 40-600 parts of water, and is prepared by stirring at high speed. According to the supermolecule corrosion inhibitor for copper and copper alloy, the organic imidazole compound and cyclodextrin derivative are used for forming a subject-object supermolecule structure through weak interaction such as hydrophobic effect and hydrogen bond, so that the solubility and dispersibility of the organic imidazole compound in water are improved. The supermolecule corrosion inhibitor for copper and copper alloy has strong universality and good anti-corrosion effect, the use amount is less, when the chemical dosing concentration is 20-60mg / L, the corrosion rate of the copper and copper alloy can be controlled to be less than 0.005mm / a, effective components of the supermolecule corrosion inhibitor can be released uniformly, and the supermolecule corrosion inhibitor can work for a long period with chemical dosing once.

Description

technical field [0001] The invention belongs to the technical field of metal corrosion and protection, and in particular relates to a corrosion inhibitor of copper and its alloys with a supramolecular structure and a high-speed stirring preparation method thereof. Background technique [0002] Copper and its alloys are widely used in the manufacture of industrial heating and cooling equipment due to their excellent mechanical, heat transfer and forging properties; for example, copper condensers in power generating units and condensers in air conditioning units. As production progresses, industrial equipment will come into contact with water, steam and other media, especially media containing oxygen and corrosive ions, resulting in corrosion; corrosion products will also gradually accumulate on the metal surface, thereby affecting the thermal efficiency of the equipment. For copper and its alloys, it is in the environment containing dissolved oxygen, oxidizing acid and coordi...

Claims

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Application Information

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IPC IPC(8): C23F11/14
Inventor 魏刚樊保民乔宁魏云鹏金广见张占佳
Owner BEIJING UNIV OF CHEM TECH
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