Application of Fe-C coated LPFG sensor for early stage corrosion monitoring of steel bar in RC structures. (30th June 2018)

• Record Type: Journal Article
• Authors: Tang, Fujian; Chen, Yizheng; Li, Zhaochao; Tang, Yan; Chen, Genda
• Is Part Of: Construction & building materials. Volume 175(2018)
• Page Start: 14
• Page End: 25
• Publication Date: 2018-06-30
• Subjects: Resonance wavelength -- Long-period grating -- Corrosion monitoring -- Coating -- EIS -- LPR; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2018.04.187
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: Fe-C coated LPFG was applied to monitor steel bar corrosion. Fe-C coated LPFG can monitor steel bar corrosion for 14 h in NaCl solution. Fe-C coated LPFG can monitor steel bar corrosion in mortar for 14 days. Fe-C coated LPFG demonstrate high sensitivity for steel corrosion loss measurement. Abstract: Fe-C coated long period fiber grating (LPFG) sensor was employed to monitor the corrosion-induced mass loss of steel bar in 3.5 wt% NaCl solution and steel bar in mortar cylinder. A two-stage process of the change in resonant wavelength as a function of the corrosion-induced mass loss of steel bar was observed. The LPFG sensor can effectively monitor steel bar corrosion loss in 3.5 wt% NaCl solution for 14 h with a sensitivity of 0.124 mg/nm change of the resonant wavelength, and in mortar cylinder for 14 days with a sensitivity of 0.405 mg/nm change of the resonant wavelength, respectively.