Preparation method of black thermal control coating on surface of light alloy

A thermal control coating and light alloy technology, applied in the direction of surface reaction electrolytic coating, coating, electrolytic coating, etc., can solve the problems of narrow application range of preparation process, unfavorable application of lightweight structural materials, and cumbersome preparation process, etc. Achieve the effect of solving process complexity and process stability, wide application range and high blackness

Active Publication Date: 2019-01-29
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
View PDF7 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above reports are based on the process of adding coloring salt additives to the basic electrolyte, and through the regulation of electrical parameters within a certain range, the black ceramic layer of micro-arc oxidation has been obtained on the surface of a specific substrate, but there is a problem that the preparation process is narrow in scope, that is, A micro-arc oxidation process can only obtain a black ceramic l

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
  • Preparation method of black thermal control coating on surface of light alloy
  • Preparation method of black thermal control coating on surface of light alloy
  • Preparation method of black thermal control coating on surface of light alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1 A method for preparing a black thermal control coating on the surface of a light alloy comprises the following steps:

[0039] (1) After grinding and polishing the surface of the light alloy sample with sandpaper, rinse it with tap water, then wash it with deionized water and dry it to obtain the treated light alloy sample.

[0040] Light alloy refers to one of aluminum alloy, magnesium alloy and titanium alloy.

[0041] ⑵ Preparation of micro-arc oxidation electrolyte:

[0042] Add a film-forming agent with a concentration of 25 g / L, a colorant with a concentration of 25 g / L, a stabilizer with a concentration of 15 g / L, and a pH regulator in deionized water, and mix well to obtain a pH value of 9 ~13 microarc oxidation electrolyte.

[0043] Among them: the film-forming agent refers to 15 g of sodium tungstate (Na 2 WO 4 2H 2 O), 10 g sodium hexametaphosphate ((NaPO 3 ) 6 )composition.

[0044] The coloring agent refers to 5 g of potassium fluotitan...

Embodiment 2

[0049] Embodiment 2 A method for preparing a black thermal control coating on the surface of a light alloy, comprising the following steps:

[0050] (1) The treated light alloy sample is the same as in Example 1.

[0051] ⑵ Preparation of micro-arc oxidation electrolyte:

[0052] Add a film-forming agent with a concentration of 40 g / L, a colorant with a concentration of 10 g / L, a stabilizer with a concentration of 15 g / L, and a pH regulator in deionized water, and mix well to obtain a pH value of 9 ~13 microarc oxidation electrolyte.

[0053] Wherein: film-forming agent refers to 1L deionized water by 15 g sodium hexametaphosphate ((NaPO 3 ) 6 ), 25 g sodium metavanadate (NaVO 3 )composition.

[0054] The coloring agent refers to 3 g of potassium fluotitanate (K 2 ZrF 6 ), 4 g potassium fluoroaluminate (K 3 AlF 6 ), 3 g ammonium metavanadate (NH 4 VO 3 )composition.

[0055] The stabilizer refers to 15 g sodium dihydrogen phosphate (NaH 2 PO 4 )composition.

[0...

Embodiment 3

[0059] Embodiment 3 A method for preparing a black thermal control coating on the surface of a light alloy, comprising the following steps:

[0060] (1) The treated light alloy sample is the same as in Example 1.

[0061] ⑵ Preparation of micro-arc oxidation electrolyte:

[0062] Add a film-forming agent with a concentration of 50 g / L, a colorant with a concentration of 10 g / L, a stabilizer with a concentration of 10 g / L, and a pH regulator in deionized water, and mix well to obtain a pH value of 9 ~13 microarc oxidation electrolyte.

[0063] Wherein: film-forming agent refers to 40 g sodium hexametaphosphate ((NaPO 3 ) 6 ), 5 g sodium metavanadate (NaVO 3 ), 5 g sodium tungstate (Na 2 WO 4 2H 2 O) Composition.

[0064] The coloring agent refers to 10 g of ammonium metavanadate (NH 4 VO 3 )composition.

[0065] The stabilizer refers to 10 g of sodium carbonate (Na 2 CO 3 )composition.

[0066] The pH adjuster refers to 8 g of ammonium oxalate ((NH 4 ) 2 C 2 o ...

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 preparation method of a black thermal control coating on the surface of a light alloy. The method comprises the following steps that (1) after being ground, a light alloy sample is cleaned and dried to obtain the treated light alloy sample; (2) a micro-arc oxidation electrolyte is prepared, wherein a film forming agent, a coloring agent, a stabilization agent and a pH value adjusting agent are added into deionized water, and after even mixing, the micro-arc oxidation electrolyte with the pH value ranging from 9 to 13 is obtained; and (3) one kind of metal in an aluminum alloy, a magnesium alloy and a titanium alloy is adopted as an anode, stainless steel is adopted as a cathode, the treated light alloy sample is soaked in the micro-arc oxidation electrolyte, circulation cooling is started, the treated light alloy sample is subjected to micro-arc oxidation treatment through a bipolar pulse power source, and after micro-arc oxidation treatment is completed, thesample is taken out and is washed with water and dried. According to the preparation method, universality and stability are good, the prepared micro-arc oxidation black thermal control coating on thesurface of the light alloy has high solar high absorbability and emissivity, and the preparation method can be widely applied to high-absorbability and high-emissivity spaceflight thermal control coatings.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment, in particular to a method for preparing a black thermal control coating on the surface of a light alloy. Background technique [0002] Light metals generally refer to metallic materials with a relative density less than 5. They are divided into non-ferrous light metals and rare light metals. Non-ferrous light metals include aluminum, magnesium, calcium, titanium, potassium, strontium, barium, etc. Rare light metals include lithium, beryllium, rubidium, cesium, etc., among which Aluminum, magnesium, and titanium are rich in resources due to their low relative density and high strength (in the earth's crust, the contents of aluminum, magnesium, and titanium are 8.0%, 2.5%, and 0.61%, respectively, accounting for the first and third in the reserves of metal elements , 4 digits), excellent overall performance and other characteristics as lightweight structural materials (mainly referr...

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): C25D11/06C25D11/30C25D11/26C25D11/14
CPCC25D11/024C25D11/026C25D11/06C25D11/14C25D11/26C25D11/30
Inventor 彭振军梁军
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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