Investigation of Application Parameters and Testing of Rain Erosion Coatings

摘要

This program was sponsored in order that the performance of selected rain erosion coatings might be evaluated and that those parameters affecting the performance of these materials might be studied with the goal in mind to upgrade rain erosion coatings for use on high performance aircraft. In order to realize this goal, the following characteristics of two select polyurethane materials were evaluated: coating adhesion to the reinforced composite substrates; solvent evaporation rates or 'solvent release' from each select rain erosion coating material for the purpose of reducing coating porosity of the cured material; a polymerization study related to the chemical reactivity of these moisture reactive materials after exposure to known quantities of free water; a coating familiarization study for each of the rain erosion coating materials; radar signal attenuation studies to determine signal losses through the rain erosion coating; and high-speed erosion tests for selected coating materials and primer combinations. (Author)