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Engineering super-hydrophobic metal coating and preparation method thereof

A metal coating, super-hydrophobic technology, applied in the field of new super-hydrophobic metal coating and its preparation, can solve problems such as difficulty in guaranteeing service life, poor organic compound chemistry, thermodynamics and mechanical stability, etc., and achieves stable and controllable process. Excellent corrosion resistance, the effect of simplifying the preparation process

Inactive Publication Date: 2017-10-03
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, organic compounds have poor chemical, thermodynamic and mechanical stability, and it is difficult to guarantee their service life, which has become the main reason restricting the application of superhydrophobic surfaces in engineering.

Method used

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  • Engineering super-hydrophobic metal coating and preparation method thereof
  • Engineering super-hydrophobic metal coating and preparation method thereof

Examples

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Embodiment 1

[0026] In the present embodiment, 260g nickel sulfate, 360g sodium citrate, 33g copper sulfate, 204g sodium bromide, 260g ammonium chloride, 980g sodium tungstate, and 10g glycine are added to deionized water to prepare a 10L plating solution, and The pH of the bath was adjusted to 8 with sulfuric acid and ammonia.

[0027] In this embodiment, low-carbon steel is used as the cathode substrate, and electroplating is performed by direct current electrodeposition after polishing and cleaning, and the cathode current density is 4A / dm 2 , Plating time is 60 minutes. Such as figure 1 As shown, the deposited surface coating 2 exhibits superhydrophobic properties after being cleaned and dried, and the contact angle of the water droplet 1 on its surface is 153±2°.

Embodiment 2

[0029] In the present embodiment, use 290g of nickel sulfate, 320g of sodium citrate, 44g of copper sulfate, 180g of sodium bromide, 200g of ammonium chloride, 980g of sodium tungstate and 15g of glycine to be added to deionized water to prepare a 10L plating solution, and pass Sulfuric acid and ammonia adjust the pH of the bath to 8.

[0030] In this example, red copper is used as the cathode substrate, and electroplating is performed by pulse electrodeposition after polishing and cleaning, and the cathode current density is 5A / dm 2 , the duty cycle is 0.6, and the plating time is 90 minutes. Such as figure 2 As shown, the deposited surface coating 2 exhibits superhydrophobic properties after being cleaned and dried, and the contact angle of the water droplet 1 on its surface is 151±2°.

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Abstract

The invention discloses a method for preparing a super-hydrophobic metal coating for engineering, which belongs to the field of surface hydrophobic material preparation, and comprises the following steps: (1) preparing a plating solution: dissolving a certain amount of citrate in water as a complexing agent, fully After stirring, add a certain amount of nickel salt and copper salt in turn, and add an appropriate amount of glycine and tungstate, and finally adjust the pH value with sulfuric acid and ammonia water to control it within the range of 4 to 10 to obtain the plating solution; (2) Preparation of the coating : the above plating solution is placed in the electrolytic tank, and the metal workpiece commonly used in engineering is used as the cathode after cleaning, rust removal and drying, and the nickel sheet is used as the anode, and the electroplating layer is obtained by direct current electrodeposition or pulse electrodeposition. The superhydrophobic metal coating in the present invention not only has superhydrophobic properties, but also has excellent corrosion resistance, and can be effectively used in the field of engineering anticorrosion.

Description

technical field [0001] The invention belongs to the field of surface hydrophobic material preparation, and in particular relates to a novel superhydrophobic metal coating and a preparation method thereof. Background technique [0002] The corrosion of metals has caused huge losses to my country's national economy, among which the loss caused by atmospheric corrosion is the most serious, accounting for more than half of the total corrosion. Atmospheric corrosion is usually caused by the moisture film (water film) formed on the metal surface. Therefore, giving the metal surface hydrophobic functional properties through surface technology is an effective means to resist corrosion caused by harsh atmospheric environments. As a new type of functional material, superhydrophobic materials have the characteristics of being unable to slide and spread on the surface and maintaining a spherical rolling shape, so they have many functions such as self-cleaning, anti-pollution, anti-corro...

Claims

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Application Information

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IPC IPC(8): C25D3/56C25D5/18C22C19/03C22C27/04C22C30/02
CPCC25D3/56C22C19/03C22C27/04C22C30/02C25D3/562C25D5/18
Inventor 周琼宇冷翔欧平王小芬齐亮
Owner JIANGXI UNIV OF SCI & TECH
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