This specification covers the requirements for six types and two classes of electrolytically formed anodic coatings on aluminum and aluminum alloys for non-architectural applications (see 6.1).

Classification:

The anodic coating Types and Classes covered by this specification are as specified herein (see 6.2 and 6.21).

Types:

Type I - Chromic acid anodizing, conventional coatings produced from chromic acid bath (see 3.4.1)

Type IB - Chromic acid anodizing, low voltage process, 22 ± 2V, (see 3.4.1)

Type IC - Non-chromic acid anodizing, for use as a non-chromate alternative for type I and IB coatings (see 3.4.1 and 6.1.2)

Type II - Sulfuric acid anodizing, conventional coatings produced from sulfuric acid bath (see 3.4.2)

Type IIB - Thin sulfuric acid anodizing, for use as a non-chromate alternative for Type I and IB coatings (see 3.4.2 and 6.1.2)

Type III - Hard Anodic Coatings (see 3.4.3)

Classes:

Class 1 - Non-dyed (see 3.5.)

Class 2 - Dyed (see 3.6.)