Micro-arc oxidation electrolyte and micro-arc oxidation method

A technology of micro-arc oxidation and electrolyte, which is applied in the direction of electrolytic coating, anodic oxidation, surface reaction electrolytic coating, etc., can solve the problems of poor adhesion, uneven surface color of micro-arc oxidation film, etc., and achieve stain resistance and compactness Enhanced performance, increased added value, uniform color effect

Inactive Publication Date: 2011-03-16
BYD CO LTD
View PDF1 Cites 42 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is the defect that the color of the surface of the micro-arc oxidation film is uneven and the adhesion is poor in the prior art, so as to provide a color micro-arc oxidation film that can form a color micro-arc oxidation film and the color of the surface of the color micro-arc oxidation film Uniform, good adhesion micro-arc oxidation electrolyte
[0008] Another technical problem to be solved by the present invention is the defect that the color of the surface of the micro-arc oxidation film is uneven and the adhesion is poor in the prior art, so as to provide a method that can form a colored micro-arc oxidation film and the surface of the color micro-arc oxidation film Micro-arc oxidation method with uniform color and good adhesion

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Micro-arc oxidation electrolyte and micro-arc oxidation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Pretreatment

[0030] Soak the aluminum alloy workpiece (6061) in the degreasing solution for 3 minutes, then rinse it with water. The degreasing solution is an aqueous solution containing 0.01 g / L of sodium hydroxide, 15 g / L of sodium phosphate, 20 g / L of sodium carbonate and 3 g / L of sodium tripolyphosphate, and the temperature of the degreasing solution is 40°C.

[0031] 2. Micro-arc oxidation

[0032] The degreased aluminum alloy workpiece is immersed in the micro-arc oxidation electrolyte, the aluminum alloy workpiece is used as the anode, and the stainless steel plate is used as the cathode, and the micro-arc oxidation is carried out at 25°C with a pulsed micro-arc oxidation power supply. The power frequency is 500HZ, accounting for The duty ratio is 20%, the voltage is 300 volts, and the current density is 5A / dm 2 , micro-arc oxidation for 30 minutes, after completion, take it out and clean it with pure water. The micro-arc oxidation electrolyte contains 20...

Embodiment 2

[0036] Aluminum alloy workpiece (2024) is carried out micro-arc oxidation according to the method described in embodiment 1, difference is, micro-arc oxidation electrolyte is to contain sodium tripolyphosphate 20g / L, sodium silicate 8g / L, sodium hydroxide 2g / L, an aqueous solution of potassium titanium oxalate 15g / L, glycerol 5ml / L, and the pH of the electrolyte is 10. The power frequency of micro-arc oxidation is 800HZ, the duty cycle is 20%, and the current density is 3A / dm 2 , the voltage is 300V, and the time of micro-arc oxidation is 30 minutes.

[0037] Finally, an aluminum alloy product with a blue micro-arc oxidation film with a thickness of 12 microns was obtained. Visually, the color was uniform.

Embodiment 3

[0039] Carry out micro-arc oxidation to aluminum alloy workpiece (6061) according to the method described in embodiment 1, difference is, micro-arc oxidation electrolyte is to contain sodium hexametaphosphate 15g / L, sodium trimetaphosphate 15g / L, sodium hydroxide 4g / L, potassium titanium oxalate 25g / L, sodium tungstate 4g / L solution, the pH of the electrolyte is 12. The power frequency of micro-arc oxidation is 3000HZ, the duty cycle is 25%, and the current density is 10A / dm 2 , the voltage is 500V, and the time of micro-arc oxidation is 40 minutes.

[0040] Finally, an aluminum alloy product with a dark blue micro-arc oxidation film with a thickness of 15 microns was obtained. Visually, the color was uniform.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the field of micro-arc oxidation, and relates to micro-arc oxidation electrolyte. The electrolyte comprises the aqueous solution of film former and toner, and has the pH value of 6.0 to 12, wherein the film former is phosphate and / or silicate; the toner is a titanium compound; and the film former content is 5 to 50 g / L, and the toner content is 5 to 30 g / L. When used for performing micro-arc oxidation on light metals, the micro-arc oxidation electrolyte provided by the invention can form blue ceramic films on the surfaces of the light metals so as to break the limitation of the conventional micro-arc oxidation technology to colors, expand grey-black and grey-white tones to colorful fields with uniform colors and achieve the decoration effect of a light-metallic product. Moreover, by the invention, the erosion resistance, the pollution resistance and the compactability of the micro-arc oxidized film are enhanced, and the surface of the micro-arc oxidized film has a ceramic texture. The invention further discloses a micro-arc oxidation method.

Description

technical field [0001] The invention relates to a micro-arc oxidation electrolyte and a micro-arc oxidation method. Background technique [0002] At present, light metal materials, such as aluminum, magnesium, titanium and their alloys, are widely used in aerospace, aviation, automobile, construction and electronics industries due to their light weight, high specific strength, good rollability and ductility, and easy processing. However, the surface of light metal is soft, not resistant to wear and high temperature, especially the corrosion potential of aluminum is low, and the overall corrosion is more serious. In order to overcome the defects in the surface properties of light metals, expand the scope of application, and prolong the service life, it is often necessary to oxidize the surface of light metal materials to form a protective film on the surface to improve the surface properties and decorative properties of light metals. [0003] The micro-arc oxidation film obt...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/02
CPCC25D11/026
Inventor 谢呈德高乡明陆平
Owner BYD CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap