Preparation method of aluminum alloy surface conductive thermal control coating with low solar absorptivity and high emissivity
A technology of solar absorptivity, aluminum alloy surface, applied in surface reaction electrolytic coating, metal material coating process, coating, etc. applied effect
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specific Embodiment approach 1
[0015] Specific implementation mode 1: The preparation method of the thermal control coating with low solar absorption rate and high emissivity on the surface of aluminum alloy of this embodiment is carried out according to the following steps:
[0016] 1. Surface pretreatment of aluminum alloy parts: immerse the aluminum alloy parts in a sodium hydroxide solution with a concentration of 15-100g / L, then keep it warm for 15-100s at 70-90°C, and rinse with clean water for 3-5 times. Rinse 3-5 times with distilled water and dry;
[0017] 2. Preparation of electrolyte: the concentration of the main film-forming agent is 10g / l-100g / l, the concentration of the auxiliary film-forming agent is 1g / l-10g / l, the concentration of the pH regulator is 5g / l-20g / l, zinc salt The concentration of the complexing agent is 10g / l~80g / l, the concentration of the complexing agent is 20g / l~100g / l, weigh the main film forming agent, auxiliary film forming agent, pH regulator, zinc salt, complexing age...
specific Embodiment approach 2
[0020] Embodiment 2: This embodiment differs from Embodiment 1 in that the models of the aluminum alloys described in step 1 are 2024, 6061 and 7075 aluminum alloys. Others are the same as in the first embodiment.
specific Embodiment approach 3
[0021] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the main film-forming agent described in step 2 is one or both of sodium tripolyphosphate and sodium silicate in any ratio. Others are the same as in the first or second embodiment.
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