철도 환경 열화 조건에 대한 차열 도료의 장기 내구성 평가

초록

Currently, high-speed rail is growing as the center of land public transportation based on excellent punctuality and safety. However, on the current high-speed rail tracks, there is a risk of deformation and train accidents due to an increase in temperature every summer, and there is no effective solution. As a new solution, previous studies have been conducted to prove the effectiveness of decreasing the temperature by applying thermal insulation paint on rail tracks and obtain the optimum coating thickness. However, analysis of long-term durability directly related to economic feasibility, such as maintenance and re-construction cycle, is insufficient. Therefore, this study evaluated the effect of environmental degradation on the thermal insulation performance to verify the long-term durability of thermal insulation paint. Specifically, an accelerated aging experiment simulating the railroad site conditions was conducted to evaluate the performance change of the thermal insulation paint, and a morphology analysis was performed to determine the cause. As a result, the thermal insulation paint showed excellent long-term durability against environmental degradation. Based on the results, applying thermal insulation paint will contribute to the improvement of maintenance efficiency and long-term safety of railway operations.

키워드