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Starch Media Blasting for Aerospace Finishing Applications
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English
Abstract
This paper reviews a wide range of starch blast media coating removal applications for the aerospace industry.
Although broad approvals by major aircraft manufacturers are still pending, commercial airlines are using this process to remove polyurethane paints from 2024-T3 and 7075-T6 clad aluminum as thin as 0.020″ without metal deformation in selected applications. Alodine 1000 and 1200 treated panels pass 7-day salt spray exposure tests after depainting. Chromic acid anodizing is also left largely intact.
A wide variety of coatings are stripped from graphite, fiberglass, and kevlar without the risk of substrate damage observed with plastic media. Polysulfide sealants and carbon deposits are easily removed from engine parts and castings. Tedlar and adhesive backing for interior finishing are removed from B727 and B737 aircraft. Primer is stripped from magnesium elevator skins leaving Dow conversion coating completely intact. Excess adhesive flash from metal-to-metal bonded parts is removed.
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Citation
Oestreich, J. and Porter, T., "Starch Media Blasting for Aerospace Finishing Applications," SAE Technical Paper 920948, 1992, https://doi.org/10.4271/920948.Also In
References
- Larson, Nona Doscher, Pat “Low Toxicity Paint Strippers D180-30690-5” The Boeing Company, Boeing Aerospace Seattle, WA
- Lenz, Ruben “Envirostrip, A Non-Petroleum Based Natural Dry Blast Media Engineered for the Aerospace Industry” DOD/Industry Advanced Coatings Removal Conference Atlanta, GA May 1990