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

A method of preparing a coating with low solar absorptivity and high emissivity on the surface of magnesium alloy by micro-arc oxidation

A technology of solar absorptivity and high emissivity, applied in anodizing and other directions, can solve the problem of high bonding force between magnesium alloy substrate and thermal control coating, low absorption rate of magnesium alloy thermal control coating, heavy aluminum alloy material, etc. problem, to achieve the effect of good thermal shock resistance, good thermal shock resistance and good bonding force

Active Publication Date: 2017-06-20
HARBIN INST OF TECH
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of heavy weight of aluminum alloy materials used in spacecraft, high absorption rate of magnesium alloy thermal control coating and low binding force between magnesium alloy substrate and thermal control coating, and provide a Method for preparing coating with low solar absorption rate and high emissivity on the surface of magnesium alloy by micro-arc oxidation

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
  • A method of preparing a coating with low solar absorptivity and high emissivity on the surface of magnesium alloy by micro-arc oxidation
  • A method of preparing a coating with low solar absorptivity and high emissivity on the surface of magnesium alloy by micro-arc oxidation
  • A method of preparing a coating with low solar absorptivity and high emissivity on the surface of magnesium alloy by micro-arc oxidation

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0022] Specific Embodiment 1: This embodiment is a method for preparing a coating with low solar absorptivity and high emissivity on the surface of a magnesium alloy by using micro-arc oxidation, which is specifically completed according to the following steps:

[0023] 1. Magnesium alloy pre-treatment: Use 240# water-grinding paper, 1000# water-grinding paper and 1500# sandpaper to polish the magnesium alloy surface, then use acetone or deionized water to clean the polished magnesium alloy surface, and then use a hair dryer to dry it to get Treated magnesium alloy;

[0024] 2. Place the treated magnesium alloy in a stainless steel electrolytic cell, the processed magnesium alloy is connected to the positive pole of the power supply as an anode; the stainless steel electrolytic tank is connected to the negative pole of the power supply as a cathode;

[0025] 3. The pulsed micro-arc oxidation power supply is used for power supply, and the current density is 1A dm -2 ~20A·dm -...

specific Embodiment approach 2

[0033] Embodiment 2: This embodiment differs from Embodiment 1 in that: the main film-forming agent described in step 3 is phosphate; the auxiliary film-forming agent is sodium hydroxide; the additive is sodium fluoride. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0034] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the electrolyte solution described in step three is composed of main film-forming agent, auxiliary film-forming agent and additives, and the solvent is water; the described The concentration of the main film-forming agent in the electrolyte is 0.5g / L-15g / L, the concentration of the auxiliary film-forming agent is 0.1g / L-10g / L, and the concentration of the additive is 0.5g / L-5g / L. Other steps are the same as those in Embodiment 1 or 2.

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
surface roughnessaaaaaaaaaa
surface roughnessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing a low-solar-absorptivity and high-transmission-rate coating on a magnesium alloy surface by means of micro-arc oxidation, relates to a preparation method of a magnesium alloy functional thermal control coating and aims to solve the problems that an existing aluminum alloy material applied to an spacecraft is large in weight, a magnesium alloy thermal control coating is high in absorptivity, and a magnesium alloy base body and the thermal control coating are low in binding force. The preparation method comprises the following steps: firstly treating magnesium alloy, and subsequently performing micro-arc oxidation by adopting a pulse micro-arc oxidation power source to prepare the low-solar-absorptivity and high-transmission-rate coating on the magnesium alloy surface by means of micro-arc oxidation. The low-solar-absorptivity and high-transmission-rate coating prepared on the magnesium alloy surface is 30 to 120 micrometers in thickness, 0.2 to 0.4 in solar absorptivity, 0.85 to 0.95 in transmission rate and 1 to 10 micrometers in roughness. The invention provides the method for preparing the low-solar-absorptivity and high-transmission-rate coating on the magnesium alloy surface by means of micro-arc oxidation.

Description

technical field [0001] The invention relates to a preparation method of a magnesium alloy functional thermal control coating. Background technique [0002] Compared with other lightweight metals, magnesium alloy has many advantages: high specific strength (ratio of strength / density), slightly lower than the highest strength fiber reinforced material; specific stiffness (ratio of elastic modulus to density) and aluminum alloy It is basically the same, much higher than engineering plastics; good mechanical processing performance; good thermal conductivity. Due to the above advantages, magnesium alloys are widely used in many fields such as aerospace military industry and civilian life, so magnesium and magnesium alloy materials are growing at a rate of more than 15% per year. [0003] When the aircraft is in orbit, because it has to be in the alternation of solar radiation and shade for a long time, the maximum temperature reaches 200°C when it is exposed to solar radiation. ...

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): C25D11/30
CPCC25D11/30
Inventor 姚忠平李超楠夏琦兴姜兆华
Owner HARBIN INST 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