Description / Abstract:
Purpose
This specification establishes the requirements for a hard
anodic coating on aluminum and aluminum alloys.
Application
This process has been used typically to increase, by formation
of a dense aluminum oxide, surface hardness and resistance to
abrasion and corrosion of aluminum and aluminum-alloy parts
containing, in general, less than 5% copper or 8% silicon or a
total of 8% of both, but usage is not limited to such applications.
Alloys with higher alloy content can be coated satisfactorily with
proper precautions in processing. Careful consideration should be
given when using this process on highly-stressed parts because of
the resultant marked lowering of fatigue performance and on parts
with sharp corners and edges where chipping may result.
Safety - Hazardous Materials
While the materials, methods, applications, and processes
described or referenced in this specification may involve the use
of hazardous materials, this specification does not address the
hazards which may be involved in such use. It is the sole
responsibility of the user to ensure familiarity with the safe and
proper use of any hazardous materials and to take necessary
precautionary measures to ensure the health and safety of all
personnel involved.