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A vacuum electroplating process on the surface of a shaft sleeve

A technology of vacuum electroplating and bushing, applied in the direction of vacuum evaporation plating, surface pretreatment, metal material coating technology, etc., can solve the problems of reducing metal mechanical properties, metal quality loss, and poor wear resistance of coatings, etc. Achieve the effects of reducing the surface friction coefficient, increasing corrosion resistance, and increasing wear resistance

Active Publication Date: 2022-03-18
昆山东申塑料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing vacuum electroplating process for shaft sleeves, acid solution is generally used to activate before electroplating, and then electroplating is performed. This treatment method will consume a large amount of acid, and will also cause the loss of metal quality, and will also generate waste acid and waste metal. question
Moreover, the hydrogen chemical potential in the pickling solution is higher than that in the pickled steel, and the hydrogen produced will penetrate into the steel and accumulate to produce hydrogen embrittlement, reducing the mechanical properties of the metal.
At the same time, there are still problems such as poor corrosion resistance and poor adhesion of the single metal coating in the electroplating process.
In addition, coatings are often used for protection and fixing after sputtering the metal layer, but most of the coatings have poor wear resistance and high viscosity, which causes the problem of viscous accumulation of the shaft sleeve during display use.

Method used

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  • A vacuum electroplating process on the surface of a shaft sleeve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Step 1: Ultrasonic cleaning the surface of the shaft sleeve with acetone, ethanol, and deionized water, and drying; obtain the shaft sleeve A;

[0030]Step 2: Dissolve dopamine in the buffer solution to obtain a dopamine solution with a concentration of 4.5 mg / L; place the sleeve in the dopamine solution for a period of time, wash and dry it, and place it in water containing the UIO-66 precursor solution In the thermal reaction kettle, the reaction conditions are set, and the polydopamine / UIO-66 film is formed in situ on the surface of the sleeve to obtain the sleeve B; the zirconium chloride and terephthalic acid solution are dissolved in deionized water and DMF solution respectively, A zirconium chloride solution and a terephthalic acid solution were formed; the two solutions were mixed and stirred for 10 hours to obtain a UIO-66 precursor solution. The reaction temperature was 120°C, and the reaction time was 72 hours.

[0031] Step 3: Evenly disperse the silane cou...

Embodiment 2

[0035] Step 1: Ultrasonic cleaning the surface of the shaft sleeve with acetone, ethanol, and deionized water, and drying; obtain the shaft sleeve A;

[0036] Step 2: Dissolve dopamine in the buffer solution to obtain a dopamine solution with a concentration of 3mg / L; place the bushing in the dopamine solution for a period of time, wash and dry it, and place it in a hydrothermal solution containing the UIO-66 precursor solution In the reaction kettle, the reaction conditions are set, and the polydopamine / UIO-66 film is formed in situ on the surface of the sleeve to obtain the sleeve B; the zirconium chloride and terephthalic acid solutions are dissolved in deionized water and DMF solution respectively to form zirconium chloride solution and terephthalic acid solution; the two solutions were mixed and stirred for 8 hours to obtain a UIO-66 precursor solution. The reaction temperature was 120°C, and the reaction time was 72 hours.

[0037] Step 3: Evenly disperse the silane cou...

Embodiment 3

[0041] Step 1: Ultrasonic cleaning the surface of the shaft sleeve with acetone, ethanol, and deionized water, and drying; obtain the shaft sleeve A;

[0042] Step 2: Dissolve dopamine in the buffer solution to obtain a dopamine solution with a concentration of 6mg / L; place the sleeve in the dopamine solution for a period of time, wash and dry it, and place it in a hydrothermal solution containing the UIO-66 precursor solution In the reaction kettle, the reaction conditions are set, and the polydopamine / UIO-66 film is formed in situ on the surface of the sleeve to obtain the sleeve B; the zirconium chloride and terephthalic acid solutions are dissolved in deionized water and DMF solution respectively to form zirconium chloride solution and terephthalic acid solution; the two solutions were mixed and stirred for 12 hours to obtain a UIO-66 precursor solution. The reaction temperature was 120°C, and the reaction time was 72 hours.

[0043] Step 3: Evenly disperse the silane cou...

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Abstract

The invention discloses a vacuum electroplating process on the surface of a shaft sleeve. Specifically, it includes surface pretreatment, in-situ synthesis of polydopamine / UIO-66 film, grafting, vacuum electroplating metal film, coating protective film and other steps to modify the surface of the shaft sleeve to increase the corrosion resistance of the shaft sleeve and reduce the surface friction coefficient. , increase wear resistance. Beneficial effects: (1) The polydopamine / UIO-66 film is synthesized in situ on the metal surface, the pickling step is omitted, the corrosion resistance of the shaft sleeve is increased, and the adhesion of the metal film layer is increased. (2) Use the vacuum sputtering process to sputter the zinc-molybdenum oxide mixed metal layer, and use the self-lubricating property of molybdenum oxide, which can effectively adhere to the zinc metal layer, increase the tightness, and increase the corrosion resistance. (3) A protective film is installed to effectively fix the metal film layer. At the same time, the filler orange gel and boron nitride / molybdenum disulfide are used to reduce the friction coefficient of the shaft sleeve surface and increase the wear resistance.

Description

technical field [0001] The invention relates to the technical field of shaft sleeve surface treatment, in particular to a vacuum electroplating process on the surface of a shaft sleeve. Background technique [0002] A shaft sleeve is a metal part that requires long-term frictional work, and it usually uses surface treatment to enhance wear resistance or corrosion resistance. The common process is electroplating process, including water electroplating and vacuum electroplating. Water electroplating is gradually replaced by vacuum electroplating process due to problems such as large pollution, large film grains, and uneven grain distribution. Vacuum electroplating is a process that uses argon gas to install target materials to separate and form molecules to physically deposit on the surface. [0003] In the existing vacuum electroplating process for shaft sleeves, acid solution is generally used to activate before electroplating, and then electroplating is performed. This tre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D7/14B05D1/38B05D3/10C23C14/06C23C14/34C23C14/02
CPCB05D7/14B05D7/582B05D1/38B05D3/102C23C14/0688C23C14/3464C23C14/345C23C14/024B05D2504/00B05D2320/00B05D2301/00B05D2518/00B05D2420/01B05D2425/01
Inventor 卜伟石磊
Owner 昆山东申塑料科技有限公司