Abstract The mechanism and sensitivity of long period fiber gratings (LPFG) corrosion sensor, which is made by coating LPFG with an inner layer of silver and an outer layer of Fe-C, are investigated in this study. Two silver and three Fe-C thicknesses were considered. Results indicate that a linear relationship is present between the change in the resonant wavelength and the mass loss of the outer Fe-C layer within certain ranges. The corrosion sensitivity and service life of LPFG corrosion sensor depend on the thickness of both silver and Fe-C layers.

中文翻译：

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Fe-C涂层长周期光纤光栅传感器用于RC结构钢腐蚀监测的机理和灵敏度

摘要 本研究研究了内层银外层Fe-C涂层长周期光纤光栅(LPFG)腐蚀传感器的机理和灵敏度。考虑了两种银和三种 Fe-C 厚度。结果表明，在一定范围内，谐振波长的变化与外Fe-C层的质量损失之间存在线性关系。LPFG腐蚀传感器的腐蚀灵敏度和使用寿命取决于银层和Fe-C层的厚度。