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March 09, 2023

Why does aluminum heat sinks need surface treatment?

Aluminum heat sinks need surface treatment to improve their thermal performance and protect them from corrosion. The surface treatment can include anodizing, chemical conversion coating, or painting. Anodizing creates a protective layer of aluminum oxide on the surface, which enhances the heat transfer by improving the surface emissivity and reflectivity. Chemical conversion coating also creates a protective layer on the surface, which improves the heat transfer and prevents corrosion. Painting can provide additional protection against corrosion and improve the aesthetics of the heat sink. Overall, surface treatment is necessary to ensure the longevity and effectiveness of aluminum heat sinks in various applications.
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