Surface process

Chromic acid anodising

Name: Hentschel Harteloxal
Address: Paul-Strähle-Straße 14, Schorndorf, Baden-Württemberg, 73614, DE
Telephone: +49 7181 97785-0

A special variant of anodising according to the Bengough-Stuart process – preferred in aerospace.

Aluminium
1–6 µm
Aerospace

Chromic acid anodising is a special variant of the anodising process. At 1–6 µm, the resulting layers are relatively thin compared with conventional anodised layers and not as wear-resistant, but very elastic.

The process provides good corrosion protection and high resistance to temperature changes. Electrolyte residues remaining in cavities do not cause corrosion. This is why components anodised in chromic acid are preferred in aerospace. Unsealed layers also serve as a primer for adhesives and paints.