Low temperature oxidation in air of iron thin films monitored with long period fiber gratings

L. Coelho; J. L. Santos; P. A. S. Jorge; J. M. M. de Almeida

doi:10.1117/12.2266324

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16 May 2017 Low temperature oxidation in air of iron thin films monitored with long period fiber gratings

L. Coelho, J. L. Santos, P. A. S. Jorge, J. M. M. de Almeida

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Proceedings Volume 10231, Optical Sensors 2017; 102310Y (2017) https://doi.org/10.1117/12.2266324
Event: SPIE Optics + Optoelectronics, 2017, Prague, Czech Republic

Abstract

In this work an investigation of long period fiber gratings (LPFGs) over coated with iron (Fe) thin layers with different thicknesses and subjected to oxidation in air atmosphere under controlled temperature is presented. The formation of iron oxides was monitored in real time by following the optical features of the LPFG attenuation band. The morphology of the oxide layer was further analyzed by scanning electron microscope (SEM). Preliminary results show that iron coated LPFGs can be used as sensors for early warning of corrosion in projects where metal structures made of iron alloys are in contact with atmospheric air.

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L. Coelho, J. L. Santos, P. A. S. Jorge, and J. M. M. de Almeida "Low temperature oxidation in air of iron thin films monitored with long period fiber gratings", Proc. SPIE 10231, Optical Sensors 2017, 102310Y (16 May 2017); https://doi.org/10.1117/12.2266324

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