Anodizing Type II

What is Type II Anodizing

Type II Anodizing is most commonly based off the military specification MIL-A-8625.  This is the standard specification used around for the world for commercially anodized aluminum in the medical, aerospace, and automotive industries as well as for military and defense applications.  It is an electrochemical process done in a sulfuric acid bath to speed the natural oxidation of the aluminum alloy.  This provides an oxide layer with improved wear resistance, hardness, and corrosion resistance.

Benefits of Type II Anodizing

There are many benefits of Type II Anodizing.  A sealed anodized part is stain resistant, easy to clean, and is heat resistant up to the melting temperature of the aluminum itself.  The process can be applied to all alloys of aluminum.  The process gives the aluminum improved paint adhesion as well as providing good electrical insulation.  The corrosion resistance that it provides is excellent for all applications including marine, industrial, high humidity, and even outer space.  The part is able to withstand a minimum of 336 hours of 5% salt spray testing per ASTM B 117.  The part can be bright dipped as well to produce an appearance that is much brighter and has more reflectivity than the raw part itself

Dyeing of Type II Anodizing

A big feature of Type II Anodizing is the ability to dye the part to a variety of different colors.  These can include black, blue, purple, yellow, red, green, gray, orange, and any number of combinations of different colors.  This dyeing is useful for part identification, inventory control, and pure aesthetics.  Most colors are light fast and can withstand very bright or hot environments without degradation of the color.

How Saporito Finishing can help

Saporito Finishing is able to process your aluminum alloys including all 2000, 6000, 7000 series wrought alloys and 356 and 380 die castings to the Type II Anodized finish.  All processing is compliant with the military specifications MIL-A-8625 and MIL-STD-171 as well as industry specifications such as AMS 2471, AMS 2472, and AMS-A-8625.  Saporito Finishing is also NADCAP approved for the Type II process and can be used for all defense and aerospace work that requires anodizing.