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A kind of ice-phobic coating on the surface of aluminum alloy and preparation method thereof

A technology of aluminum alloy surface and coating, which is applied in the direction of metal material coating process, coating, liquid chemical plating, etc., can solve the problems of great difference in coating performance, less ice-phobic coating, and difficult preparation, etc. Achieve the effects of reducing shear strength, low cost, and simple preparation method

Active Publication Date: 2019-01-29
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the perspective of the preparation method of the ice-phobic coating, it mainly includes chemical etching, anodic oxidation, electrospinning, etc., but the performance of the coating varies greatly due to the difference in the specific process.
In addition, due to the high cost and difficulty in preparation, the industrial application of ice-phobic coatings on aluminum alloy surfaces is still relatively small. It is urgent to develop an ice-phobic coating and its Preparation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Soak the aluminum alloy material in 0.5mol / L dilute hydrochloric acid solution for 8 minutes, take it out and rinse it with deionized water until the surface is neutral, then put it in absolute ethanol for 12 minutes, take it out and dry it at 45°C ;

[0018] (2) At 0.02mol / L NiSO 4 In the solution, add 0.2mol / L dilute HF solution, so that the atomic ratio of F and Ni is 2:1, then add graphene oxide to the solution to a content of 0.03mg / L, after stirring evenly, process step (1) The obtained aluminum alloy material was suspended in the solution, and concentrated ammonia water was slowly added dropwise to the solution to adjust the pH value of the solution to 8, then the system was kept at 53°C for 1 hour with stirring, and then the temperature was raised to 75°C for 2.5 hours with warming and stirring. After the alloy material is taken out, wash it with deionized water until the surface is neutral, and place it in a vacuum drying oven at 50°C for vacuum drying;

...

Embodiment 2

[0021] (1) Soak the aluminum alloy material in 1mol / L dilute hydrochloric acid solution for 6 minutes, rinse it with deionized water until the surface is neutral, then place it in absolute ethanol for 13 minutes, and dry it at 60°C after taking it out;

[0022] (2) At 0.04mol / L NiSO 4 In the solution, add 0.4mol / L dilute HF solution, so that the atomic ratio of F and Ni is 2:1, then add graphene oxide to the solution to a content of 0.4mg / L, after stirring evenly, process the step (1) The obtained aluminum alloy material was suspended in the solution, and concentrated ammonia water was slowly added dropwise to the solution to adjust the pH value of the solution to 8.2, then the system was kept at 60°C for 1 hour with stirring, and then heated to 80°C for 2 hours with heat preservation and stirring, and the aluminum alloy After the material is taken out, it is washed with deionized water until the surface is neutral, and placed in a vacuum drying oven at 50°C for vacuum drying;...

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Abstract

The invention discloses an aluminum alloy surface thin ice coating layer and a preparation method thereof. The coating layer consists of the following components: nickel hydroxide, oxidized graphene and palmitic acid, wherein nickel hydroxide is of a nanosphere structure; oxidized graphene is uniformly embedded among nickel hydroxide nanospheres in a piece form to form a micro-nano composite structure; and palmitic acid covers the surface of the micro-nano composite structure. The coating layer is excellent in thin ice effect, can prominently reduce the surface shearing strength of ice, and prolongs the icing time; and the preparation method is simple and convenient, low in cost and excellent in application value.

Description

1. Technical field [0001] The invention relates to the field of surface engineering, in particular to an ice-phobic coating on the surface of an aluminum alloy and a preparation method thereof. 2. Background technology [0002] The icing caused by severe cold weather poses a serious threat to the safe operation of urban cables, communication towers, aircraft wings, etc. The usual solution is to break the icing and fall off by external heating or physical beating after icing. This method has low processing efficiency when the freezing time is long, the ice layer is thick, and the freezing surface is wide. Therefore, it is necessary to develop an ice-phobic coating to actively prevent icing and reduce the risk of icing. [0003] At present, there are many ice-phobic coatings reported. For example, Richard Menini et al. developed an Al coating on the surface of aluminum alloy. 2 o 3 / PTFE ice-phobic coating, it was found that the contact angle of the coating to water is 130-1...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/12C23C18/04
CPCC23C18/04C23C18/1204C23C18/1241C23C18/1262C23C18/1295
Inventor 徐玉福刘志超吴若琪姚路路余景源胡献国
Owner HEFEI UNIV OF TECH
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