VW TL 212
VW TL 212: Oxide Coatings on Aluminum Parts - Surface Protection Requirements
Anodic oxide protective coatings on parts made of pure aluminum and wrought aluminium alloys as well as for brake calipers made of cast alloys, for decorative applications (under moderate corrosion conditions) or technical / functional applications (under corrosion and / or wear conditions) for internal and external parts
