Multipoint fiber-optic-based corrosion sensor

Martins-Filho, Joaquim F.; Fontana, Eduardo; Guimaraes, J.; Coêlho, Isnaldo José de Souza

doi:10.1117/12.785570

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…Corrosion detection was also realized by monitoring the color shift in the incident broadband light reflected from the surface under inspection [15]. Martins-Filho et al [16,17] proposed a multiplexed sensor system that can detect corrosion several kilometers away using optical time domain reflectometry (OTDR). The sensor system has several heads connected to an OTDR and each sensor head has an optical fiber with its cleaved end coated with aluminum film.…”

Section: Introductionmentioning

confidence: 99%

Optical fiber corrosion sensor based on laser light reflection

Wang

Huang

2011

Smart Mater. Struct.

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The development of an optical fiber corrosion sensor based on the principle of light reflection is presented in this paper. The sensor consists of an optical fiber reflection sensor and a tube/film subassembly formed by welding a sacrificial metallic film to a steel tube. One side of the sacrificial metallic film is finely polished and is isolated from the environment while the other side is exposed to the corrosive environment. The corrosion pits initiated at the exposed film surface slowly penetrate the sacrificial film as the exposure time increases. The corrosion pits that reach the polished surface reduce the surface reflectivity of the polished surface. This decrease in reflectivity is detected by the optical fiber reflectivity sensor. To interrogate multiple sensors at one time, a sensor multiplexing scheme was implemented. The principles of operation, packaging, and characterization of the corrosion sensors are presented.

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Section: Introductionmentioning

confidence: 99%

Optical fiber corrosion sensor based on laser light reflection

Wang

Huang

2011

Smart Mater. Struct.

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High-Order Fiber Bragg Grating Corrosion Sensor Based on the Detection of a Local Surface Expansion

Budinski

Njegovec

Pevec

et al. 2023

Structural Control and Health Monitoring

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This paper presents a fiber optic sensor for the detection of corrosion processes that occur on metal surfaces. In the proposed sensor design, a sensing fiber with an inscribed high-order Bragg grating is attached to the observed metal surface. A broadening of high-order Bragg grating spectral characteristics is observed and used to detect small and highly localized longitudinal strain variations that occur along the fiber as a result of corrosive rust flakes’ formations beneath the sensing fiber. The proposed approach provides a straightforward fabrication method, the possibility for unobtrusive mounting, including mounting of the sensor beneath the corrosion-protective layers, and consistent corrosion detection yields.

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Multipoint fiber-optic-based corrosion sensor

Cited by 2 publications

References 3 publications

Optical fiber corrosion sensor based on laser light reflection

Optical fiber corrosion sensor based on laser light reflection

High-Order Fiber Bragg Grating Corrosion Sensor Based on the Detection of a Local Surface Expansion

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