The Black Anodizing allows obtaining all the features of natural oxidation and the aesthetic benefits of coloration.
- Resistance to corrosion, from 8 to 72 hours according to oxide width, ref UNI 9227 norm;
- Moderate thermic isolation;
- Moderate increase of superficial hardness (300 HV₀₀₅ according to internal specification).
From 5 to 20 µm
Available in black and gold.
Hard dark oxidation applies to 1000, 5000, 6000, 7000 alloys and up until G-Alsi5 for shell fusion.