Innovative Masking of Ferrous Inserts in Magnesium Aerospace Components Prior to Tagnite Anodization (v.1, Unlimited Release).

摘要

In the past, it has not been possible to apply an anodized coating to a magnesium aviation component containing mixed metals in particular, ferrous inserts. The presence of the mixed metals inserts during anodization will lead to the rapid oxidation of the inserts, which results in metal loss and damage to the magnesium substrate. Technology Applications Group has developed masking technology that overcomes this limitation and allows magnesium aviation components to be anodized in the presence of mixed metals. This technology was developed to show that magnesium DOD aviation components coming out of overhaul cycle can be successfully Tagnite anodized without damaging the mixed metal components. Applying a Tagnite coating to overhaul components in this manner gives these components a corrosion-resistance coating that is better than the original coatings applied on new build magnesium aviation components, leading to a longer component lifetime. In addition, the use of the Tagnite coating after overhaul will eliminate or minimize the need for chromate conversion coatings for touchup. This Industrial Base Innovation Fund effort focused on the development and testing of masking tools for three magnesium components on the AH-64, two components on the UH-60, and one component on the UH-47. This masking technology was successfully demonstrated in front of representatives of the Army Aviation community in February 2012.