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

Technology adapted for magnesium alloy matrix surface mechanical zinc-and tin-plating composite coating

A composite coating, mechanical galvanizing technology, applied in metal material coating process, pressure inorganic powder coating, coating and other directions, can solve the problems of poor corrosion resistance of magnesium and magnesium alloy materials, and achieve poor corrosion resistance, Easy-to-control, simple-to-equip effects

Inactive Publication Date: 2007-11-07
BEIHANG UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The composition of magnesium in magnesium alloy accounts for more than 90%, and the standard electrode potential of magnesium is very negative in metals, and the potential in common media is also very low. For example, the stable potential in seawater is -1.5 ~ -1.6V, In addition, since the oxide film (mainly composed of MgO) formed on the surface of magnesium alloy is generally loose and porous, the corrosion resistance of magnesium and magnesium alloy materials is poor.

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
  • Technology adapted for magnesium alloy matrix surface mechanical zinc-and tin-plating composite coating
  • Technology adapted for magnesium alloy matrix surface mechanical zinc-and tin-plating composite coating
  • Technology adapted for magnesium alloy matrix surface mechanical zinc-and tin-plating composite coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Embodiment 1 ZM-5 magnesium alloy mechanical galvanized tin composite coating

[0054] A, the ZM-5 magnesium alloy sample (4 samples, the total surface area is about 24cm 2 ) for pre-treatment, stand-by;

[0055] Oil removal is carried out in an aqueous solution composed of 10% sodium hydroxide and 5% sodium phosphate, the treatment temperature is room temperature, and the oil removal treatment time is 30s.

[0056] Etching is carried out in a dilute phosphoric acid solution with a concentration of 20%, the treatment temperature is room temperature, and the etching treatment time is 20s.

[0057] Activation Activation is carried out in an aqueous solution composed of 15% potassium pyrophosphate and 10% sodium carbonate, the treatment temperature is 80°C, and the activation treatment time is 20 minutes.

[0058] Zinc dipping is carried out in an aqueous solution composed of 50g / L zinc sulfate, 10g / L sodium carbonate, 6g / L sodium fluoride and 150g / L potassium pyrophosph...

Embodiment 2

[0066] Example 2 AZ91 magnesium alloy composite mechanical galvanized tin layer

[0067] A, the AZ91 magnesium alloy samples (4 samples, the total surface area is about 24cm 2 ) carry out the pretreatment of degreasing, etching, activation and galvanizing, stand-by; sample pretreatment is identical with embodiment 1.

[0068] B, preparation mechanical plating bath is identical with embodiment 1.

[0069] C, selecting the shock medium is the same as that in Example 1.

[0070] D. Add 4 AZ91 magnesium alloy samples, 50ml of mechanical plating solution, 50g of glass beads, and 6g of metal powder mixed uniformly with a mass ratio of 2:1 zinc powder and tin powder into the plating barrel. Adjust the rotation speed of the plating barrel to 90r / min, and start to implement mechanical plating.

[0071] Then add 2g of zinc-tin mixed powder every 15 minutes, repeat twice, and then carry out intensive impact for 15 minutes.

[0072] Finally, the AZ91 magnesium alloy sample was taken o...

Embodiment 3

[0074] Embodiment 3 MB60 magnesium alloy mechanical galvanized tin composite coating

[0075] A, the MB60 magnesium alloy samples (4 samples, the total surface area is about 24cm 2 ) to carry out the pre-treatment of degreasing, etching, activation and galvanizing, stand-by; the sample pre-treatment is the same as that of Example 1.

[0076] B, preparation basic plating solution is identical with embodiment 1.

[0077] C, selecting the shock medium is the same as that in Example 1.

[0078] D. Add 4 MB60 magnesium alloy samples, 50ml of basic plating solution, 50g of glass beads, and 6g of metal powder mixed uniformly with a mass ratio of 1:2 zinc powder and tin powder into the plating barrel. Adjust the rotational speed of the plating barrel to 90r / min, and begin to implement mechanical plating.

[0079] Then add 2g of zinc-tin mixed powder every 15 minutes, repeat twice, and then carry out intensive impact for 15 minutes.

[0080] Finally, the MB60 magnesium alloy sample...

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

No PUM Login to View More

Abstract

The present invention discloses one kind of mechanical plating technological process to form composite coating on the surface of magnesium alloy base. The present invention includes pre-treatment process for magnesium alloy base, formulation of mechanical plating solution and mechanical plating process. The pre-treatment includes the steps of deoiling, etching, activating and zinc dip coating. The mechanical plating solution consists of base plating solution and dispersant, and the metal powder for the plating consists of zinc powder and tin powder of 200-300 mesh fineness and weight ratio of 0.2-5. The composite coating on the surface of magnesium alloy base is homogeneous, fine and well combined with the base material, and can raise the corrosion resistance of the magnesium alloy base obviously.

Description

technical field [0001] The invention relates to a surface treatment method for molded products, more particularly, a composite mechanical plating process suitable for the surface of magnesium alloy molded products. A composite coating is formed on the surface of the magnesium alloy material treated by the process, which effectively improves the corrosion resistance of the magnesium alloy material. Background technique [0002] Magnesium is an element with very abundant reserves, and its abundance in the earth's crust ranks eighth; the density of magnesium alloys is less than 2g / cm 3 , Among practical metals, magnesium alloy has the smallest specific gravity, which is 1 / 4 of iron and 2 / 3 of aluminum; magnesium alloy has high specific strength and specific stiffness, excellent thermal conductivity and electrical conductivity, has electromagnetic shielding properties, and good Damping performance and cutting processing performance; After the flame retardant problems of magnesi...

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): C23C26/00C23C30/00C23C24/04
Inventor 朱立群李卫平潘波
Owner BEIHANG UNIV
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