Development of Coating Removing from GFRP Surface by Abrasive Air Jet Using Amino Thermoset Plastic Abrasive

摘要

Abstract In this study, amino thermoset plastic (ATP) particles with medium hardness and angular shape were selected as abrasive to remove the aircraft coating from the glass fiber reinforced polymer (GFRP) surface. According to the characteristics of the coating removal, it is found that ATP abrasive can be used in abrasive air jet (AAJ) to remove the coating from the GFRP surface. To illustrate the mechanism of coating removal by ATP-AAJ, a novel interaction model between ATP particle and coating material based on the law of momentum conservation was established; then an erosion model was further proposed to quantitatively estimate coating removal. It indicates that the above two models can be adequate to quantitatively evaluate the coating removal process. The results of this study showed that ATP abrasive can not only be used in AAJ (about 15 cycles of use) to remove the coating by delamination but also can avoid damage to the GFRP substrate surface. These discoveries are specially used for aircraft coating removal from the large aerospace monolithic components made of GFPR and other polymer composites, which can effectively avoid the degradation behavior of the composite substrate and, more importantly, benefit to economic improvement and environmental protection.