Quick Reaction Evaluations of Materials and Processes. Delivery Order 0005: Effects of Several Paint Removal Technologies on the Static and Fatigue Properties of Thin Aerospace Structural Materials

摘要

An evaluation was conducted to ascertain the influence of paint removal technologies designed for use on thin skin aerospace structures, as well as to provide a sound database for future comparisons of other new and existing paint strip technologies. Materials evaluated were 2024-T3 sheet, both bare and clad, 7075-T6 sheet, thin skin aluminum honeycomb panels, and to a limited extent, polymeric composite sheet. The paint removal technologies examined include a CO2 laser, chemical, plastic media blast (PMB), and conventional hand sanding. In order to properly compare the influence of these paint removal procedures on mechanical properties, comparisons were made to both as-received materials and similar samples that while not painted were subjected to the same thermal aging cycles as the painted samples. Types of tests performed were tensile and fatigue for the aluminum sheets materials, peel and flatwise tension for the honeycomb panels, and flexural and in-plane shear for the Gr-Ep composites. Results of all properties were statistically compared to ascertain significant differences in properties following the stripping operations.