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Electro-deposition method for preparing super-hydrophobic coating on surface of conductor

A conductor surface and coating technology, applied in the field of two-step spray electrodeposition to prepare super-hydrophobic coatings, can solve problems such as electrical conductivity, poor thermal conductivity, contact corrosion, and restricted applications, and achieve anti-freezing water resistance, reduce water resistance, The effect of simplifying the experimental steps

Pending Publication Date: 2021-02-26
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The surface of many metal substrates (such as titanium alloy, aluminum alloy, stainless steel, etc.) has disadvantages such as poor wear resistance, prone to contact corrosion, difficult welding, poor electrical and thermal conductivity, etc., which seriously restricts its application.

Method used

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  • Electro-deposition method for preparing super-hydrophobic coating on surface of conductor
  • Electro-deposition method for preparing super-hydrophobic coating on surface of conductor
  • Electro-deposition method for preparing super-hydrophobic coating on surface of conductor

Examples

Experimental program
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Effect test

Embodiment 1

[0029]The method of preparing a super-hydrophobic nickel coating on the surface of a titanium alloy substrate formed by SLM technology by electrodeposition method includes the following steps:

[0030]1. Configuration solution I, its composition is: NiSO4.6H2O 1M / L, NiCl2.6H2O 0.35M / L, H3BO4 0.5M / L, C7H5O3NS 30-60mM / L; configuration solution II, its composition is: NiCl2.6H2O 1M / L, NH4Cl 2M / L, H3BO4 0.5M / L;

[0031]2. Sandblasting the surface of the titanium alloy base: choose cast iron sand as the abrasive, with a particle size of 0.5mm to 1.5mm, a pressure of 0.7MPa, and a distance of 200mm from the nozzle to the surface of the base metal. The spray direction is the same as the normal of the base metal surface. The angle is controlled at 20°;

[0032]3. Ultrasonic cleaning with deionized water and alcohol respectively, the cleaning time is about 10 minutes, and then dry for use;

[0033]4. Put solution I into the solution circulation system of the machine tool and heat it to 50~55℃;

[0034]5. T...

Embodiment 2

[0039]A method for preparing a superhydrophobic copper coating on the surface of a copper substrate by electrodeposition, which includes the following steps:

[0040]1. Configuration solution I, its composition is: CuSO4.5H2O 1M / L, H2SO4 0.5M / L, C7H5O3NS 30-60mM / L, configuration solution II, its composition is: CuSO4 30mM / L, H2SO4 1.5M / L, NH4Cl 1M / L;

[0041]2. Grind the copper sheet with 400 mesh, 800 mesh and 1200 mesh sandpaper first, then ultrasonically clean with absolute ethanol for 10 minutes, finally rinse with deionized water, and then dry for use;

[0042]3. Put solution I into the solution circulation system of the machine tool and heat it to 35~45℃;

[0043]4. Use the substrate obtained in step 2 as the cathode, the copper rod as the anode, and use a DC power supply with a current density of 60A / cm2Take out the sample after 20 minutes of electroplating and clean it with deionized water and alcohol;

[0044]5. Change the plating tank and solution, and use solution II to perform the seco...

Embodiment 3

[0048]The electrodeposition method is a method for preparing a superhydrophobic gold coating on the surface of a conductively treated ceramic, which includes the following steps:

[0049]1. Configuration solution I, its composition is: NiSO4.6H2O 1M / L, NiCl2.6H2O 0.35M / L, H3BO4 0.5M / L, C7H5O3NS 30-60mM / L; configuration solution II, its composition is: AuCl3·HCl·4H2O 5mM / L, H2SO4 2M / L, NH4Cl1M / L;

[0050]2. Conduct conductive treatment on the ceramic surface, the method can be magnetron sputtering method, composite electrodeposition method, etc.;

[0051]3. Put solution I into the solution circulation system of the machine tool and heat it to 50~55℃;

[0052]4. The substrate obtained in step 2 is used as the cathode, the nickel rod is used as the anode, the DC power supply is used, and the current density is 100A / cm2, Take out the sample after electroplating for 20 minutes, and clean it with deionized water and alcohol;

[0053]5. Replace the plating tank and solution, and use Solution II to perfor...

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Abstract

The invention discloses a method for preparing a super-hydrophobic protective coating on the surface of a conductive base. The method comprises the following steps: heating distilled water in a container, controlling the temperature to be 30-60 DEG C, sequentially adding a metal salt solution which has the same material as a first coating layer, a pH buffering agent, and an additive, fully dissolving and uniformly stirring the mixture, and controlling the pH to be 3-5 to obtain a first solution; similarly, heating distilled water in a container, controlling the temperature to be 30-60 DEG C, sequentially adding a metal salt solution which has the same material as a second coating layer, a NH4+ salt containing NH4Cl and the like, and a pH buffering agent, fully dissolving and uniformly stirring the mixture, and controlling the pH to be 3-5 to obtain a second solution, wherein in the experiment, the conductive base is used as a cathode, and a metal current-conducting rod having the samematerial as the coating layers is used as an anode; after electrifying, spraying the first solution onto the surface of the cathode through an anode nozzle for deposition, and then cleaning a workpiece; then replacing a plating tank and using the second solution II, and conducting secondary deposition; and after deposition is completed, ultrasonically cleaning the machined workpiece with distilledwater and alcohol, and drying the workpiece, so that the super-hydrophobic coating is formed. According to the method, the super-hydrophobic coating can be prepared on the surface of any conductive base (such as nickel, copper, aluminum and the like) or any non-conductive base (such as ceramic and the like) subjected to conductive treatment. The super-hydrophobic coating prepared by the method can be applied to the fields of ship surfaces, electronic components, specific containers, microfluid systems and the like.

Description

Technical field[0001]The invention relates to an electrodeposition processing technology, in particular to a method for preparing a super-hydrophobic coating by a two-step spray electrodeposition method.Background technique[0002]Super-hydrophobic surface generally means that the contact angle of water is greater than 150° and the rolling angle is less than 10°. The super-hydrophobic surface has important characteristics such as anti-snow, waterproof, anti-fog, anti-pollution, anti-oxidation, anti-corrosion and self-cleaning, etc., and has extremely broad application prospects in many fields such as scientific research, production and life. The super-hydrophobic technology is also of practical significance for the anti-corrosion, rust and anti-fouling in the construction industry, automobile industry, and metal industry.[0003]Many metal substrate surfaces (such as titanium alloy, aluminum alloy, stainless steel, etc.) have shortcomings such as poor wear resistance, prone to contact c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/08C25D5/12C25D3/12C25D3/38C25D3/48C25D5/54
CPCC25D5/08C25D5/12C25D5/54C25D3/12C25D3/38C25D3/48
Inventor 沈理达汪展文田宗军
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS