Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Magnesium alloy differential arc electrophoresis composite surface treating method

A composite surface treatment and electrophoretic treatment technology, applied in electrophoretic plating, electrolytic coating, anodizing and other directions, can solve the problems of complex process and environmental pollution, and achieve the effect of good bonding strength and cost saving.

Inactive Publication Date: 2007-02-07
XIAN UNIV OF TECH
View PDF0 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The magnesium alloy after anodic oxidation and chromizing treatment is analyzed by salt spray test, and its corrosion resistance is within 100 hours, which is far lower than the requirement of more than 500 hours for practical application; micro-arc oxidation technology is characterized by its simple process, high efficiency, and no pollution , strong ability to handle workpieces, etc., have been developed rapidly, and the properties of magnesium alloys have been greatly improved. However, the ceramic film formed after micro-arc oxidation of magnesium alloys can meet the corrosion resistance requirements in general environments. , but there is still a certain gap between its corrosion resistance and actual production needs in special environments; the method of electrophoresis after phosphating makes the corrosion resistance of magnesium alloys meet the requirements of practical applications, and can change the appearance and color of the film layer, but this process The process is complex and seriously pollutes the environment

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] First, according to the ratio of weight to volume, an electrolyte is prepared with sodium silicate 5g / L, potassium hydroxide 11g / L and potassium fluoride 7g / L, and the magnesium alloy workpiece to be treated is placed in the electrolyte for micro-arc oxidation treatment. , the magnesium alloy workpiece is used as the anode, and the stainless steel plate is used as the cathode, and the process parameters of the control process are as shown in Table 1, so that the magnesium alloy workpiece surface is formed with a thickness of 5um magnesium alloy ceramic layer;

[0018] time / minute

Voltage / Volt

Frequency / Hz

duty cycle

0

260

300

10

1

350

350

8

2

400

450

6

3

stop

[0019] Secondly, immerse the magnesium alloy workpiece processed in the previous step in deionized water, and clean it with an ultrasonic cleaner for 10 minutes;

[0020] Finally, the cleaned...

Embodiment 2

[0023] The magnesium alloy workpiece to be processed is carried out the micro-arc oxidation treatment process as embodiment 1, and the process parameters of the control process are as shown in table 3, so that the magnesium alloy workpiece surface is formed with a thickness of 20um magnesium alloy ceramic layer;

[0024] time / minute

Voltage / Volt

Frequency / Hz

duty cycle

0

200

300

10

1

300

350

8

3

350

400

6

5

stop

[0025] Secondly, immerse the magnesium alloy workpiece processed in the previous step in deionized water, and clean it with an ultrasonic cleaner for 8 minutes;

[0026] Finally, the cleaned magnesium alloy workpiece is subjected to cathodic electrophoresis treatment, the magnesium alloy workpiece is used as the cathode, and the stainless steel plate is used as the anode. Under the condition of stirring the electrolyte, the control process paramet...

Embodiment 3

[0029] The magnesium alloy workpiece to be treated is carried out the micro-arc oxidation treatment process as embodiment 1, and the process parameters of the control process are as shown in table 5, so that the magnesium alloy workpiece surface is formed with a thickness of 10um magnesium alloy ceramic layer;

[0030] time / minute

[0031] Secondly, immerse the magnesium alloy workpiece processed in the previous step in deionized water, and clean it with an ultrasonic cleaner for 10 minutes;

[0032] Finally, the cleaned magnesium alloy workpiece is subjected to cathodic electrophoresis treatment, the magnesium alloy workpiece is used as the anode, and the stainless steel plate is used as the cathode. Under the condition of stirring the electrolyte, the control process parameters are shown in Table 6, and the electrophoretic paint with a thickness of 20um is obtained. Film, that is, a composite film layer of ceramic layer and electrophoretic paint film is formed on th...

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 discloses a compound surface disposing method of Mg-alloy micro-arc electrophoresis, which comprises the following steps: placing the disposed Mg-alloy working piece in the silicate electrolytic solution to proceed micro-arc oxidizing disposal; forming Mg-alloy ceramic layer; immersing in the deionized water; cleaning through ultrasonic wave cleaner; proceeding electrophoretic disposal for Mg-alloy working piece; forming compound film on the surface.

Description

technical field [0001] The invention relates to a surface treatment method for magnesium alloy materials, in particular to a method for surface treatment of magnesium alloy materials by using a composite process of micro-arc oxidation and electrophoresis. Background technique [0002] In recent years, magnesium alloy, as a lightweight material with unique properties, has been recognized and valued by many industries, but the poor corrosion resistance of magnesium alloy has become an important factor restricting its development. It must undergo certain surface treatment to improve corrosion resistance. In order to meet the actual needs of certain fields. [0003] At present, the common surface treatment methods of magnesium alloys include anodic oxidation, chromizing treatment, micro-arc oxidation, electrophoresis after phosphating, etc. The magnesium alloy after anodic oxidation and chromizing treatment is analyzed by salt spray test, and its corrosion resistance is within ...

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
IPC IPC(8): C25D11/30C25D13/00
Inventor 蒋百灵师惠英李均明杨巍
Owner XIAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com