Surface Treatments
Aluminium

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Surface Treatments
Aluminium

Author : Thibault FOURCADE

Publication date: September 10, 2026 | Lire en français

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5. Surface Treatments

5.1 Anodizing

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5.1.1 Principle

Anodizing is an electrolytic treatment that artificially thickens the alumina layer to a thickness of 5 to 25 µm for standard sulfuric acid anodizing, and even thicker for hard anodizing (Figure 7 ). It gives the metal a hard, smooth, and durable surface that can also be dyed.

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