研究了一种基于与钢筋成分相似的 Fe-C膜光纤光栅锈蚀传感器,在模拟海洋环境3．5％NaCl 溶液中进行锈蚀监测,同时与电化学监测比较.对 Fe-C膜进行电子探针、XRD和SEM测试,阐述了传感器的结构和原理.实验结果表明：光纤锈蚀传感器在2．5 d达到最大漂移量430 pm,锈蚀10 d 敏感膜出现脱落,波长发生回落.与电化学监测相比,光纤锈蚀传感器能够实现长期监测,并获得锈蚀时间、锈蚀速率和锈蚀程度等锈蚀状态,对钢结构的实时在线监测具有重要意义.
Fiber Bragg grating corrosion sensor based on Fe-C film with the similar composition of carbon steel was studied in this paper.Fiber corrosion sensor and electrochemical method were compared for corrosion moni-toring in 3 .5% NaCl solution.EDX,xrd and SEM were investigated on Fe-C film,sensor’s structure and prin-ciple were introduced.The experiment result shows fiber corrosion sensor has the biggest shift of 430 pm in 2. 5 d corrosion;after 10 d corrosion film falls off,corresponding to the decrease of wavelength.Compared to elec-trochemical method,fiber Bragg grating corrosion sensor shows dominance in long-term monitoring;it can get the time,speed and degree of corrosion,which has great significance in online monitoring of carbon steel.
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