Sulfuric Acid Anodize is a protective anodic oxide coating produced on Aluminum and aluminum alloys applied by an electrochemical process that converts the substrate metal surface into a, durable, corrosion- resistant and decorative finish. The anodic oxide structure originates from the aluminum substrate and is composed entirely of aluminum oxide. The oxide coating thickness is comprised of 50% penetration below the surface of origin and 50% build up over the surface of origin. As such, a one inch aluminum rod measuring 1.000” that is anodized to a thickness of 0.001” anodized, will measure 1.001” after the anodize coating. The anodic coating can range in thickness based on aluminum alloy being process and color needs and is typically 0.0002-0.0010” thick. This coating is acknowledged as Type II under the military specification MIL-A-8625.

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