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Super-hydrophobic Zn-poly tetra fluoro ethylene (PTFE) composite electrodeposition layer and preparation method thereof

A composite electrodeposition, super-hydrophobic technology, applied in coatings, electrolytic coatings, etc., can solve the problems of weak binding force, poor stability, limiting the practical application of super-hydrophobic functional surfaces, etc., to achieve low production cost, avoid corrosion, good industrial The effect of the application foreground

Active Publication Date: 2019-11-15
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the inventors of the present disclosure found that most of the low surface energy materials used for low energy modification are deposited on the surface of the sample by physical or chemical adsorption, with weak binding force and poor stability, which limits the practical application of superhydrophobic functional surfaces.

Method used

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  • Super-hydrophobic Zn-poly tetra fluoro ethylene (PTFE) composite electrodeposition layer and preparation method thereof
  • Super-hydrophobic Zn-poly tetra fluoro ethylene (PTFE) composite electrodeposition layer and preparation method thereof
  • Super-hydrophobic Zn-poly tetra fluoro ethylene (PTFE) composite electrodeposition layer and preparation method thereof

Examples

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Effect test

Embodiment 1

[0046] The preparation method of superhydrophobic Zn-PTFE composite electrodeposition layer comprises the following steps in turn:

[0047] (1) Select X90 pipeline steel (20×50×3mm) as the matrix sample, pure zinc plate (20×50×5mm) as the counter electrode sample, and polish the processed X90 pipeline steel and pure zinc sample with water sandpaper Smooth to 2500#, and put the polished sample into acetone and absolute ethanol for 5 minutes for ultrasonic cleaning to remove grease and pollutants on the surface of the sample;

[0048] (2) Immerse the above-mentioned cleaned steel sample into a mixed aqueous solution containing 30g / L sodium hydroxide, 20g / L sodium carbonate, 20g / L sodium phosphate and 10g / L sodium silicate (60°C ) to remove oil by alkali washing for 15 minutes. 2 SO 4 Pickling and activation in aqueous solution (room temperature) for 15s, cleaning and drying after taking out, in order to improve the binding force between the composite electrodeposited layer and...

Embodiment 2

[0054] The preparation method of superhydrophobic Zn-PTFE composite electrodeposition layer comprises the following steps in turn:

[0055] (1) Select X90 pipeline steel (20×50×3mm) as the matrix sample, pure zinc plate (20×50×5mm) as the counter electrode sample, and polish the processed X90 pipeline steel and pure zinc sample with water sandpaper Smooth to 2500#, and put the polished sample into acetone and absolute ethanol for 5 minutes for ultrasonic cleaning to remove grease and pollutants on the surface of the sample;

[0056] (2) Immerse the above-mentioned cleaned steel sample into a mixed aqueous solution containing 30g / L sodium hydroxide, 20g / L sodium carbonate, 20g / L sodium phosphate and 10g / L sodium silicate (60°C ) to remove oil by alkali washing for 15 minutes. 2 SO 4 Pickling and activation in aqueous solution (room temperature) for 15s, cleaning and drying after taking out, in order to improve the binding force between the composite electrodeposited layer and...

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Abstract

The invention provides a super-hydrophobic Zn-poly tetra fluoro ethylene (PTFE) composite electrodeposition layer and a preparation method thereof. The preparation method includes the steps that a steel matrix is activated by adopting a sulfuric acid aqueous solution, the activated steel matrix is used as a negative pole, zinc metal is used as a positive pole, and electrodeposition is conducted inan electrodeposition solution; and the electrodeposition solution contains a zinc salt, boric acid, PTFE powder and a surfactant, and the concentration of the PTFE powder is 10-40 g / L. In the prepared super-hydrophobic Zn-PTFE composite electrodeposition layer, sheet PTFE microstructures are evenly distributed on the surface of the electrodeposition layer, network structures are formed, most sheet PTFE microstructures are basically perpendicular to the matrix surface, the structural characteristics and low surface energy of PTFE itself make the obtained Zn-PTFE composite electrodeposition layer realize super-hydrophobicity, and at the same time, the electrodeposition layer further has the characteristics of strong adhesion and high stability.

Description

technical field [0001] The disclosure belongs to the field of surface modification of metal materials, and relates to a method for preparing a superhydrophobic surface on a steel substrate, in particular to a superhydrophobic Zn-PTFE composite electrodeposited layer and a preparation method thereof. Background technique [0002] The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] As an important engineering material, steel is widely used. The adhesion of water phase liquid to the surface of steel will increase the probability of corrosion and rust, and reduce the service life of steel. Traditional anti-corrosion technologies usually electrodeposit a layer of metal, alloy or metal-based composite layer on the surface of steel to reduce the corrosion probability of steel surface; in addition, the superhydrophobic surface will reduce the contact and adhesion of the aqueous phase mi...

Claims

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Application Information

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IPC IPC(8): C25D3/56C25D15/00C25D5/36
CPCC25D3/565C25D5/36C25D15/00
Inventor 李好彭玉洁
Owner SHANDONG UNIV OF SCI & TECH
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