Method for processing magnesium alloy surface

A treatment method, magnesium alloy technology, applied in superimposed layer plating, metal material coating process, liquid chemical plating, etc., can solve the problems of poor corrosion resistance of magnesium alloys

Active Publication Date: 2008-10-29
BYD CO LTD
View PDF1 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the disadvantages of poor corrosion resistance of magnesium alloys treated by existing magnesium

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

Example Embodiment

[0052] Example 1

[0053] This embodiment illustrates the surface treatment method of magnesium alloy provided by the present invention

[0054] (1) Pretreatment

[0055] Place the magnesium alloy AZ91D (Nanjing Yunhai Special Metal Co., Ltd.) with a size of 80×50×2 mm on a polishing machine (80LA PU vibrator produced by Zhongyun Polishing and Grinding Materials Co., Ltd.) to vibrate the surface of the magnesium alloy (vibration) The frequency is 800 Hz) for 20 minutes, that is, rough polishing is performed, and then the magnesium alloy surface is manually polished with a cloth wheel (80#) for 1 minute to make the magnesium alloy surface reach a mirror effect.

[0056] (2) Electroless zinc plating and electroplating

[0057] Before electroless galvanizing, the magnesium alloy surface is pre-treated. At 35°C, the pretreated magnesium alloy with bright surface obtained in step (1) was immersed in a double volume of degreasing liquid (the degreasing liquid is a mixture of trisodium p...

Example Embodiment

[0066] Example 2

[0067] This embodiment illustrates the surface treatment method of magnesium alloy provided by the present invention

[0068]The magnesium alloy is subjected to surface treatment according to the method of Example 1, except that the magnesium alloy is subjected to sandblasting in the pretreatment step of step (1). The sandblasting method is to place the magnesium alloy on an automatic sandblasting machine (JC-SS01 produced by Jichuan Machinery Co., Ltd.) to sandblast the surface of the magnesium alloy for 2 minutes, and the average diameter of the sand particles on the magnesium alloy surface is 30 microns.

[0069] The electroplating procedure of step (2) is the same as that of Example 1, except that the time for electroplating nickel is 8 minutes, and the thickness of the nickel plating layer obtained is 8 microns. The total thickness of the electroplated metal layer is 33 microns.

[0070] In the magnetron sputtering ion plating step of step (3), the pressure...

Example Embodiment

[0071] Example 3

[0072] This embodiment illustrates the surface treatment method of magnesium alloy provided by the present invention

[0073] The magnesium alloy AZ91D was subjected to surface treatment according to the method of Example 1, except that the magnesium alloy was subjected to wire drawing in the pretreatment step of step (1). The wire drawing method includes placing the magnesium alloy on a wire drawing machine (JH-A300-4S produced by Hua Machinery Manufacturing Company) to wire the surface of the magnesium alloy. The wire drawing wheel is a nylon wheel. The average diameter is 50 microns.

[0074] The electroplating step of step (2) is the same as that of Example 1, except that the first step of electroplating copper is 10 minutes, and the second step of electroplating copper is 20 minutes, and the total thickness of the obtained copper plating layer is 35 microns. The total thickness of the electroplated metal layer is 47 microns.

[0075] In the magnetron sputte...

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 relates to a method for the surface treatment of magnesium alloy. The method includes that a metal coating is formed on the surface of the magnesium alloy, wherein, the method for forming metal coating on the surface of the magnesium alloy comprises the following steps: first, a zinc layer is coated on the surface of the magnesium alloy through electroless plating, then at least a layer of metal layer is electrocoated on the zinc layer of electroless plating, and at least a layer of metal or metal compound is coated on the electrocoated metal layer by adopting an ion plating method. After the zinc layer of electroless plating is treated by the method, electroplating is performed to the magnesium alloy first by the method of combining the electroplating and ion plating; the plating layer obtained after ion plating is performed to the electrocoated metal layer has uniform thickness; the plating layer is smooth; the corrosion resistance is remarkably improved; and the binding power between the base material of the magnesium alloy and the plating layer is also better. The magnesium alloy after through surface treatment can integrate good corrosion resistance and good decoration effect, and at the same time, can meet the requirements of high performance and high aesthetics of various industries for the magnesium alloy products, such as the automobile industry, the electronic industry, etc.

Description

technical field [0001] The invention relates to a treatment method for the surface of a magnesium alloy. Background technique [0002] Magnesium is abundant in the earth, second only to aluminum and iron, occupying the third place. The density of magnesium is small (1.74×10 3 kg / m 3 ), is the lightest of industrial metals, with high specific strength, up to about 18.8, low melting point (923K), low strength of magnesium, cast state σ b =115 MPa, low yield strength, cast σ 0.2 =25 MPa, in order to improve the strength of magnesium, some alloying elements are usually added to make magnesium alloy. Magnesium alloy has the characteristics of light weight, high specific strength, good heat dissipation, good electromagnetic shielding, and good recycling. At present, with the continuous development of the automobile, electronics and other industries in the direction of energy saving and aesthetics, the application prospects of light metal alloys are becoming more and more obvi...

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): C23C28/00C23C18/00C25D5/00C23C14/32C23C14/35C23C14/54C23C14/06
Inventor 陈梁
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