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Method for processing micro-pit arrays on metal surface

A micro-pit array, metal technology, applied in electrolytic coatings, electrophoretic plating, coatings, etc., can solve the problems of complex processing links, high process costs, narrow application scope, etc., and achieves simple operation, low process cost, and easy implementation. Effect

Inactive Publication Date: 2014-01-22
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies such as complex processing links, high process cost, low processing precision and narrow application range commonly found in the existing micro-pit array method, the present invention proposes a method that uses an electrophoretic micro-particle film as a mask, which can be used on the surface of a three-dimensional object. Method for Area Processing of Densely Distributed Fine Micropit Arrays

Method used

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  • Method for processing micro-pit arrays on metal surface
  • Method for processing micro-pit arrays on metal surface
  • Method for processing micro-pit arrays on metal surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (a) Use a pipette gun to pipette 10ml of a suspension (10% by mass) containing polystyrene microparticles (spherical) with a particle size of 180±10nm into a beaker, and then measure 90ml of absolute ethanol into the same beaker middle. After the beaker was sealed, it was stirred ultrasonically for 60 minutes, and then mechanically stirred at high speed for 2 hours to prepare a polystyrene electrophoretic solution.

[0031] (b) Immerse the stainless steel sheet I (1 mm × 10 cm × 2 cm) after polishing, derusting, degreasing, etc. into the electrophoretic solution to a depth of 2 cm. Another stainless steel sheet II (1mm×10cm×2cm) that has been polished, derusted, degreased, etc. is also immersed in the electrophoretic solution. Then the stainless steel sheet I was used as the anode, and the stainless steel sheet II was used as the cathode, and a direct current of 5V was passed through for 1 minute. Because the polystyrene microparticles 1 are negatively charged, after ...

Embodiment 2

[0035] The step (a) of implementing the second example is the same as the step (a) of the first example. The remaining steps are as follows:

[0036] (b) Immerse the polished, derusted, degreased nickel sheet I (1mm x 10cm x 2cm) in the electrophoretic solution to a depth of 2cm. Put another nickel sheet II (1 mm × 10 cm × 2 cm) after polishing, derusting, degreasing, etc. into the electrophoretic solution. Then take the nickel sheet I as the anode and the nickel sheet II as the cathode, and pass a 5V direct current for 1 minute. Because the polystyrene microparticles 1 are negatively charged, after electrification, they will be electrophoretically deposited on the nickel sheet 1 to form a film 3 made of polystyrene microparticles 1.

[0037] (c) After natural drying, the nickel sheet I coated with polystyrene microparticles 1 was placed in an oven, baked at 75°C for 60 minutes, and then cooled to room temperature naturally. The glass transition temperature of the polystyre...

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Abstract

The invention relates to a method for processing micro-pit arrays on a metal surface. The method comprises the steps of (a) performing uniform electrophoretic-coating of a layer of film (3) formed by non-metal microparticles (1) on a surface of a to-be-processed workpiece; (b) after drying the film on the surface of the to-be-processed workpiece, roasting for 30-90 minutes under glass transition temperature of the non-metal microparticles, and naturally cooling to room temperature; (c) placing the surface of the to-be-processed workpiece which is coated with the film in chemical corrosive liquid or electrolyte, and performing chemical or electrochemical corrosion processing while slightly stirring; (d) stopping corrosion processing after the film on the surface of the to-be-processed workpiece falls off, taking out the workpiece, flushing and drying the workpiece. The method is low in process cost, flexible and efficient, and can be used for processing densely distributed micro-pit arrays on the three-dimensional complex and large metal surface.

Description

technical field [0001] The invention relates to a method for processing a micropit array on a metal surface, which belongs to the field of electrochemical processing. Background technique [0002] In many application areas, micropitting of the surface is often used to enhance application efficacy. As in the dynamic friction pair, the surface structure with micropit array can effectively reduce friction and wear. As another example, the formation of some micro-nano pit structures on the solid surface is beneficial to reduce its wettability and even achieve super-hydrophobic effect. The size and shape of the micropit directly affect its application effect. The surface properties and geometric features of the micropit are closely related to the processing method. [0003] At present, the common micro-pit array processing methods include: self-excited vibration processing method, electric discharge machining method, numerical control laser honing method, micro-ultrasonic proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D13/06C23F1/02C25F3/14
Inventor 明平美包晓慧杨磊郝巧玲李慧娟王俊涛毕向阳张晓东
Owner HENAN POLYTECHNIC UNIV
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