Investigation of Composite-Coating Systems for Rain-Erosion Protection.
Final rept. 20 Mar 72-19 Mar 73,
DAYTON UNIV OHIO RESEARCH INST
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To investigate the relative rain-erosion resistance of two-layer composite polyurethane coatings as compared with that of single-layer coatings of the two individual materials, four coating types single-layer H, single-layer S, composite HS consisting of 9 mils of H applied over 6 mils of S, and composite SH consisting of 9 mils of S applied over 6 mils of H are prepared. Coatings of the four types are tested for rain-erosion resistance on three different rotating-arm devices and are further subjected to laboratory tests to determine the pressure and loading rate produced at a depth of 15 mils below the surface of the coating by a standard impact. Energy absorbed by the coatings is also determined by making measurements of resilience. Author, modified-PL
- Coatings, Colorants and Finishes