CAJ | 학술논문

目的：在较短的时间内获得有机涂层在沙漠大气环境下的腐蚀失效规律。方法针对有机涂层中应用比较广泛的丙烯酸聚氨酯涂层，采用紫外暴晒与吹沙试验相结合的加速试验环境谱进行实验室模拟沙漠大气环境加速老化试验，通过分析涂层质量、厚度、光泽度、表面形貌及电化学阻抗的变化，研究有机涂层的老化失效过程。结果随着加速试验周期的延长，丙烯酸聚氨酯涂层发生了一系列变化，表现为涂层质量减小，厚度减薄，光泽度降低，表面微观缺陷增多，电化学低频阻抗模值减小，防护性能下降。结论通过加速试验，可以快速获得有机涂层在沙漠大气环境下的老化失效规律。
목적：재교단적시간내획득유궤도층재사막대기배경하적부식실효규률。방법침대유궤도층중응용비교엄범적병희산취안지도층，채용자외폭쇄여취사시험상결합적가속시험배경보진행실험실모의사막대기배경가속노화시험，통과분석도층질량、후도、광택도、표면형모급전화학조항적변화，연구유궤도층적노화실효과정。결과수착가속시험주기적연장，병희산취안지도층발생료일계렬변화，표현위도층질량감소，후도감박，광택도강저，표면미관결함증다，전화학저빈조항모치감소，방호성능하강。결론통과가속시험，가이쾌속획득유궤도층재사막대기배경하적노화실효규률。
Objective To get the law of failure of the organic coating in the desert atmospheric environment in a relatively short period of time. Methods Acrylic polyurethane coating which is widely used in organic coatings was selected in the test, the acceler-ated aging test of the organic coating in desert atmospheric environment was carried out using the method of UV exposure and blo-wing sands test in the laboratory, and the aging process of the organic coating was characterized by changes in coating mass, thick-ness, gloss, the surface morphology and the electrochemical impedance. Results It turned out that the organic coating began to de-grade with the decrease of mass, gloss, thickness and impedance but the increase of micro defects which implied the decrease of coating protective properties with time. Conclusion The law of degradation of the organic coating in desert atmospheric environment could be quickly obtained by accelerated test.