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

Magnesium alloy passivation solution and magnesium alloy surface treatment method

A passivation treatment and surface treatment technology, which is applied in the direction of metal material coating process, superimposed layer plating, electrolytic coating, etc., can solve problems such as reaction, and achieve the effects of low energy consumption, low resistance, and corrosion prevention

Active Publication Date: 2016-01-20
SUZHOU MITAC PRECISION TECH
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the purpose of this invention is to provide a kind of magnesium alloy passivation solution and magnesium alloy surface treatment method, this passivation solution is used for the passivation treatment before magnesium alloy colorless electrophoresis, solves the problem that magnesium alloy and electrophoretic paint react

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
  • Magnesium alloy passivation solution and magnesium alloy surface treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] In order to achieve the above object, the magnesium alloy passivation solution provided by the present invention is used for the passivation treatment before the magnesium alloy colorless electrophoresis. The magnesium alloy passivation solution uses water as a solvent and includes the following components calculated by concentration:

[0041] Chromium nitrate 2.5g / L;

[0042] Oxalic acid 0.8g / L;

[0043] Citric acid 1g / L;

[0044] Sodium silicate 1.5g / L;

[0045] Cobalt nitrate 1g / L.

[0046] The present invention also provides a magnesium alloy surface treatment method, the magnesium alloy surface treatment method comprising the following steps:

[0047] Step 101: Degreasing the magnesium alloy in a degreasing solution to remove surface oil, where the concentration of the degreasing solution is 40 g / L, the degreasing temperature is 60° C., and the degreasing time is 10 minutes;

[0048] Step 102: Wash the degreased magnesium alloy with water and put it into the ma...

Embodiment 2

[0051] In order to achieve the above object, the magnesium alloy passivation solution provided by the present invention is used for the passivation treatment before the magnesium alloy colorless electrophoresis. The magnesium alloy passivation solution uses water as a solvent and includes the following components calculated by concentration:

[0052] Chromium nitrate 1.5g / L;

[0053] Oxalic acid 1.2g / L;

[0054] Citric acid 0.8g / L;

[0055] Sodium silicate 1.2g / L;

[0056] Cobalt nitrate 0.8g / L.

[0057] The present invention also provides a magnesium alloy surface treatment method, the magnesium alloy surface treatment method comprising the following steps:

[0058] Step 101: Degreasing the magnesium alloy in a degreasing solution to remove surface oil, where the concentration of the degreasing solution is 60 g / L, the degreasing temperature is 60° C., and the degreasing time is 10 minutes;

[0059] Step 102: Wash the degreased magnesium alloy with water and put it into th...

Embodiment 3

[0062] In order to achieve the above object, the magnesium alloy passivation solution provided by the present invention is used for the passivation treatment before the magnesium alloy colorless electrophoresis. The magnesium alloy passivation solution uses water as a solvent and includes the following components calculated by concentration:

[0063] Chromium nitrate 2g / L;

[0064] Oxalic acid 1g / L;

[0065] Citric acid 0.5g / L;

[0066] Sodium silicate 1g / L;

[0067] Cobalt nitrate 0.5g / L.

[0068] The present invention also provides a magnesium alloy surface treatment method, the magnesium alloy surface treatment method comprising the following steps:

[0069] Step 101: Degreasing the magnesium alloy in a degreasing solution to remove surface oil, where the concentration of the degreasing solution is 50 g / L, the degreasing temperature is 60° C., and the degreasing time is 10 minutes;

[0070] Step 102: Wash the degreased magnesium alloy with water and put it into the magn...

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 invention relates to a magnesium alloy passivation solution and a magnesium alloy surface treatment method. The magnesium alloy passivation solution comprises the following components according to concentration: 1-4g / L chromium nitrate; 0.5-2g / L oxalic acid; 0.2-1g / L citric acid; 0.5-2g / L sodium silicate; and 0.2-1g / L cobalt nitrate. The surface treatment method comprises the steps of: putting magnesium alloy in a degreasing solution to undergo degreasing so as to remove surface greasy dirt; washing the degreased magnesium alloy and putting it into the magnesium alloy passivation solution to perform a passivation treatment; and washing the passivated magnesium alloy, and conducting an electrophoresis treatment. The magnesium alloy passivation solution and the magnesium alloy surface treatment method provided in the invention have the advantages that: the passivation solution does not contain hexavalent chromium and is in line with the environmental requirements; a passivation film is formed on the product surface, thus effectively preventing electrophoretic paint from corroding the magnesium alloy during electrophoresis; the passivation film has low resistance and does not affect the electrophoresis conductivity; the method adopts an intermediate temperature environment and has low energy consumption; and the passivation film is colorless and transparent, thus having no appearance influence on subsequent colorless electrophoresis.

Description

【Technical field】 [0001] The invention relates to a passivation solution and a surface treatment method, in particular to a magnesium alloy passivation solution and a magnesium alloy surface treatment method. 【Background technique】 [0002] Because magnesium alloy material is a light structural material, the quality is 2 / 3 of aluminum and 1 / 4 of steel. Compared with steel, aluminum, plastic and other engineering materials, magnesium alloy has good strength and rigidity, and good electromagnetic shielding performance , non-magnetic; good shock absorption; non-toxic, recyclable; excellent machining performance, high die-casting productivity, small size shrinkage, and has excellent low temperature performance and high thermal conductivity, so it is widely used. At present, it has become the main material in electronic products such as notebook computers, mobile phones, PDAs, etc., and the application range of magnesium alloys has rapidly expanded. [0003] Magnesium alloy colo...

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 Patents(China)
IPC IPC(8): C23C22/46C25D13/00C23C28/00
Inventor 丁欣
Owner SUZHOU MITAC PRECISION 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