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Coatings 2017, 7(3), 35; doi:10.3390/coatings7030035

Pitted Corrosion Detection of Thermal Sprayed Metallic Coatings Using Fiber Bragg Grating Sensors

1
Department of Civil and Environmental Engineering, North Dakota State University, P.O. Box 6050, Fargo, ND 58108, USA
2
Department of Mechanical Engineering, North Dakota State University, P.O. Box 6050, Fargo, ND 58108, USA
*
Author to whom correspondence should be addressed.
Academic Editors: Niteen Jadhav and Andrew J. Vreugdenhil
Received: 30 January 2017 / Revised: 16 February 2017 / Accepted: 20 February 2017 / Published: 24 February 2017
(This article belongs to the Special Issue Coatings for Corrosion Mitigation)
View Full-Text   |   Download PDF [13691 KB, uploaded 24 February 2017]   |  

Abstract

Metallic coatings using thermal spraying techniques are widely applied to structural steels to protect infrastructure against corrosion and improve durability of the associated structures for longer service life. The thermal sprayed metallic coatings consisting of various metals, although have higher corrosion resistance, will still corrode in a long run and may also subject to corrosion induced damages such as cracks. Corrosion and the induced damages on the metallic coatings will reduce the effectiveness of the coatings for protection of the structures. Timely repair on these damaged metallic coatings will significantly improve the reliability of protected structures again deterioration. In this paper, an inline detection system for corrosion and crack detection was developed using fiber Bragg (FBG) grating sensors. Experimental results from laboratory accelerated corrosion tests showed that the developed sensing system can quantitatively detect corrosion rate of the coating, corrosion propagations, and cracks initialized in the metallic coating in real time. The developed system can be used for real-time corrosion detection of coated metal structures in field. View Full-Text
Keywords: corrosion detection; thermal spraying metallic coating; fiber Bragg grating; structural health monitoring corrosion detection; thermal spraying metallic coating; fiber Bragg grating; structural health monitoring
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MDPI and ACS Style

Deng, F.; Huang, Y.; Azarmi, F.; Wang, Y. Pitted Corrosion Detection of Thermal Sprayed Metallic Coatings Using Fiber Bragg Grating Sensors. Coatings 2017, 7, 35.

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