【摘要】 用光敏感化合物在紫外可见光照射下能发出荧光的特性,筛选了3种光敏感材料,分别将它们添加在环氧漆中制备光敏智能涂层中,并涂覆在含钪铝合金的表面,对铝合金的早期腐蚀进行监测预警。用荧光光谱研究了光敏材料的荧光特性。通过全浸腐蚀试验和盐雾试验研究传感涂层中光敏物质的荧光特性变化与铝合金腐蚀的对应关系,光学显微及扫描电子显微分析表明荧光特征点处即为铝合金基体腐蚀过程中发生阳极过程的区域。探讨了传感涂层对腐蚀监测的灵敏度,并对光敏智能涂层监测铝合金腐蚀的工作机理进行了分析。结果表明,所选的3种光敏材料均能有效地监测到铝合金基体的腐蚀位置及腐蚀发展过程。更多还原

【Abstract】 Three kinds of fluorescence materials have been chosen for monitoring corrosion of Al-Sc alloy by incorporating them into epoxy paint as sensing material.The characteristics of the sensitive coating can be easily observed with UV light.The fluorescence characteristics were studied using fluorescence spectrum.The fluorescence materials react with aluminum ions on corroded aluminum substrate to occur fluorescence emission or quenching that can be observed in UV light.This paint system is sensitive to underlying corrosion processes by reaction to the Al3+ produced by anodic reaction that accompanies corrosion.Active corrosion areas on the sample surface have been found under the fluorescence spots by optical microscope.The corrosion areas can be observed more clearly by SEM.This suggested that the fluorescence spots were the sites of produced Al3+ associated with the anodic reaction of the local attack of the coated Al alloy substrate in the chloride solution.The sensitivity of the coating containing fluorescence materials and the mechanism of the sensitive coating for monitoring corrosion were discussed.The result indicates that three materials can monitor the corrosion process in-situ and the corrosion degree can be shown by fluorescence spots size.更多还原