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A kind of composite coating and its preparation method and application

A composite coating and application technology, applied in the field of composite coating with corrosion inhibition and its preparation, can solve the problems of shortening the safe operating life of transformers and the like

Active Publication Date: 2015-10-28
HUBEI ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conductive layer of copper pollutants will be deposited on the surface of the insulating paper covering the copper winding, and gradually accumulate between the insulating paper layers, resulting in the formation of arcs between the transformer winding discs or between the conductors, thereby shortening the safe operation of the transformer life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 0.5g of sea shrimp shell chitosan was dissolved in 125mL of 2% (V / V) acetic acid solution, suction filtered to remove impurities for later use, 100mg of dysprosium oxide was heated and dissolved in 100mL of 2% (V / V) nitric acid, and then according to The mass ratio of chitosan and dysprosium oxide was 100:1 to prepare a mixed solution, and the pH was adjusted to 3.8 with sodium hydroxide solution.

[0016] Prepare the electrodeposition device, the positive electrode of the DC power supply is connected to the platinum electrode, and the negative electrode is inserted into the solution system by clamping the cleaned 3cm×1cm×0.02cm copper sheet with a clamp. Turn on the power supply, adjust the voltage at 5V, and the electrodeposition time is 5-10min. Stop electrodeposition when the copper sheet shows a clear white deposition film, remove the copper sheet and soak it in 2g / 100mL glutaraldehyde dilute solution for 2 minutes, then take it out and dry it for analysis and test...

Embodiment 2

[0019] 0.5g of crab shell chitosan was dissolved in 125mL of 2% (V / V) acetic acid solution, and filtered to remove impurities for later use. Heat and dissolve 100 mg of erbium nitrate in 100 mL of 2% (V / V) nitric acid, then prepare a mixed solution according to the mass ratio of chitosan and erbium nitrate of 100:1, and adjust the pH to 3.8 with sodium hydroxide solution.

[0020] Prepare the electrodeposition device, the positive electrode of the DC power supply is connected to the platinum electrode, and the negative electrode is inserted into the solution system by clamping the cleaned 3cm×1cm×0.02cm copper sheet with a clamp. Turn on the power supply, adjust the voltage at 5V, and the electrodeposition time is 5-10min. Stop electrodeposition when the copper sheet shows a clear white deposition film, remove the copper sheet and soak it in 4g / 100mL glutaraldehyde dilute solution for 1 minute, then take it out and dry it for analysis and testing. According to embodiment 2 me...

Embodiment 3

[0023] 0.5g of crab shell chitosan was dissolved in 125mL of 2% (V / V) acetic acid solution, and filtered to remove impurities for later use. Heat and dissolve 100 mg of cerium nitrate in 100 mL of 2% (V / V) nitric acid, then prepare a mixed solution according to the mass ratio of chitosan and cerium nitrate of 100:1, and adjust the pH to 3.8 with sodium hydroxide solution.

[0024] Prepare the electrodeposition device, the positive electrode of the DC power supply is connected to the platinum electrode, and the negative electrode is inserted into the solution system by clamping the cleaned 4cm×1cm×0.2cm iron sheet with a clamp. Turn on the power supply, adjust the voltage at 5V, and the electrodeposition time is 5-10min. Stop electrodeposition when the iron sheet shows that a clear white deposition film is formed, take off the iron sheet and soak it in 1g / 100mL glutaraldehyde dilute solution for 5 minutes, then take it out and dry it for analysis and testing. According to embo...

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PUM

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Abstract

The invention provides a chitosan-rare earth composite coating with the corrosion inhibition effect and a preparation method thereof. The film contains chitosan and a rare earth compound. A chitosan-rare earth protective layer is formed on the surfaces of metal materials such as copper, iron and the like by adopting an electrodeposition method to reduce corrosion of the metal materials. Chitosan is a natural polymer organic matter, roots in chitins such as shrimps, crab shells and the like and has the advantages of abundant resources, non-toxicity, harmlessness, easiness in biodegradation and the like. Rare earth elements are more abundant in China and the protective effects of the coatings on the metal materials are obviously improved by adding a small quantity of rare earth matters. The method is suitable for copper materials in transformer oil and metal materials used in other oils.

Description

technical field [0001] The invention belongs to the technical field of metal material corrosion and protection. It specifically relates to a composite coating with corrosion inhibiting effect, its preparation method and application. Background technique [0002] Corrosion of metal materials pervades all sectors of the national economy. The huge harm of corrosion is not only reflected in economic losses, but also brings heavy casualties, environmental pollution, waste of resources and many other problems. Metal anti-corrosion is to protect metal objects that are prone to rust by adopting various means to achieve the purpose of prolonging their service life. Usually, physical anti-corrosion, chemical anti-corrosion, electrochemical anti-corrosion and other methods are used. The corrosion protection of metal is very important to the development of national economy. Covering various protective layers on the metal surface to separate the protected metal from corrosive media is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D9/08
Inventor 覃彩芹李伟任乔林颜永斌王贤树官慧刘迎罗彪
Owner HUBEI ENG UNIV