Tian Xing-Ling, Feng Chao, Zhao Xu-Hui
Chinese Academy of Cultural Heritage, Beijing 100029, China.
Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, China.
ACS Omega. 2020 Aug 19;5(34):21679-21683. doi: 10.1021/acsomega.0c02535. eCollection 2020 Sep 1.
Fluorescence spectroscopy is a common technique used to monitor early metallic corrosion. The fluorescence response characteristics of rhodamine-ethylenediamine toward Cu have been studied using fluorescence and infrared spectroscopy. Fluorescence microscopy and electrochemical impedance spectroscopy were used to study the monitoring effect of rhodamine-ethylenediamine on the corrosion of copper relics protected by an epoxy coating. The results showed a strong fluorescent response and selectivity toward Cu that existed using rhodamine-ethylenediamine. Early metallic corrosion of copper relics can be effectively monitored upon adding 0.8 wt % rhodamine-ethylenediamine to an epoxy coating. When the soaking time was increased, the fluorescence intensity of the fluorescent area on the coating became stronger. In addition, the area of the luminous coating reached ∼0.06 mm and the area of corrosion under the protective coating was ∼0.008 mm, which was about 1/10 of the fluorescence area observed on the coating.
荧光光谱法是一种用于监测早期金属腐蚀的常用技术。利用荧光光谱和红外光谱研究了罗丹明-乙二胺对铜的荧光响应特性。采用荧光显微镜和电化学阻抗谱研究了罗丹明-乙二胺对环氧涂层保护的铜文物腐蚀的监测效果。结果表明，罗丹明-乙二胺对铜具有强烈的荧光响应和选择性。在环氧涂层中添加0.8 wt%的罗丹明-乙二胺可以有效地监测铜文物的早期金属腐蚀。浸泡时间增加时，涂层上荧光区域的荧光强度变强。此外，发光涂层的面积达到约0.06 mm，保护涂层下的腐蚀面积约为0.008 mm，约为涂层上观察到的荧光面积的1/10。
