Method for preparing thermal control coating with high sunlight absorptivity and high emittance on the surface of magnesium alloy
A technology of solar absorptivity and high emissivity, applied in anodizing and other directions, can solve problems such as the inability to meet the requirements of lightweight spacecraft structures and the heavy weight of aluminum alloy materials, to improve corrosion resistance, avoid corrosion, and bond strength. high effect
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[0007] Specific embodiment 1: The preparation method of the magnesium alloy surface high solar absorptivity and high emissivity thermal control coating of this embodiment is carried out according to the following steps: 1. Magnesium alloy surface pretreatment: the magnesium alloy is immersed in a concentration of 80g / L~ In 120g / L sodium hydroxide aqueous solution, keep it at 70℃~90℃ for 15min~20min, after taking it out, rinse with clear water, then rinse with distilled water, and dry; 2. Preparation of electrolyte: as main film forming agent The concentration is 20g / L~100g / L, the concentration of auxiliary film forming agent is 1g / L~10g / L, the concentration of coloring additives is 10g / L~50g / L, the concentration of complexing agent is 20g / L~100g / L, PH The concentration of the regulator is 1g / L~5g / L. Weigh the main film-forming agent, auxiliary film-forming agent, coloring additives, complexing agent, PH regulator and water, and prepare it into electrolyte; 3. The magnesium treat...
Example Embodiment
[0010] Specific embodiment two: This embodiment is different from specific embodiment one in that in step one, the magnesium alloy is immersed in an aqueous sodium hydroxide solution with a concentration of 85g / L~115g / L and kept at a temperature of 75℃~85℃ for 16min ~19min. Others are the same as the first embodiment.
Example Embodiment
[0011] Specific embodiment three: This embodiment is different from specific embodiment one or two in that in step one, the magnesium alloy is immersed in an aqueous sodium hydroxide solution with a concentration of 100 g / L and kept at a temperature of 80° C. for 18 minutes. Others are the same as the first or second embodiment.
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