Type I, Chromic Acid Anodizing (CAA)
Type I, Chromic Acid Anodizing (CAA)
First commercial type of anodizing Compatible with many aluminium alloys Widely used in aerospace and defense Minimise metal fatigue Resist corrosion: 336 hours of 5% salt spray resistance as per ASTM B117
Thin anodic coating: .00002”-.0001” (20 to 100 micro inches).
Surface finish will be gray and since it is thin, it will not be possible to add color.
Benefits
Good for tight tolerance parts because it will not change dimensions. This type of anodizing is also great for bonding, welded parts and assemblies. Finally, the Chromic Acid Anodizing is non-conductive.
Application
This type of anodizing is good for aerospace components as either a final finish, a base for paint or as a companion finish to hard anodizing (multi-processes).
What We Do
What is Anodizing ?
Anodizing is an electrochemical process that converts the metal surface into an oxide finish.
At Ultraspec, we treat only aluminum even though nonferrous metals, such as magnesium and titanium, also can be anodized.
Our Process Types
Type II, Sulfuric Acid Anodizing (SAA)
Most frequently used type of anodizing, this process will generate a decorative or protective surfaces with a greater durability than surfaces treated with type I.
Type III, Hardcoat Anodizing (HCA)
Most frequently used type of anodizing, this process will generate a decorative or protective surfaces with a greater durability than surfaces treated with type I.
BAC 5632 / MIL-A-8625 Boric Sulfuric Anodizing
Developed by Boeing Aerospace as a chrome free alternative to type I, for non-critical fatigue part. The adhesion to paint is equal or superior to Type I and this type of anodizing provides corrosion protection.