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Related Concept Videos

Corrosion of Reinforcement01:27

Corrosion of Reinforcement

249
The corrosion of steel reinforcement within concrete is a process influenced by the material's inherent properties and external factors. The high pH level of around 13, provided by calcium hydroxide present in concrete, initially protects the steel reinforcement by promoting the formation of a passive iron oxide layer on its surface.
However, over time and under certain conditions like carbonation, chloride ingress, and cracking this protective state can be compromised. Steel has areas with...
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Corrosion02:49

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The degradation of metals due to natural electrochemical processes is known as corrosion. Rust formation on iron, tarnishing of silver, and the blue-green patina that develops on copper are examples of corrosion. Corrosion involves the oxidation of metals. Sometimes it is protective, such as the oxidation of copper or aluminum, wherein a protective layer of metal oxide or its derivatives forms on the surface, protecting the underlying metal from further oxidation. In other cases, corrosion is...
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Updated: Aug 30, 2025

Optimized Sealing Process and Real-Time Monitoring of Glass-to-Metal Seal Structures
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Sensing System Based on FBG for Corrosion Monitoring in Metallic Structures.

Israel Sousa1, Luis Pereira2, Esequiel Mesquita1

  • 1Laboratory of Buildings Durability and Rehabilitation, Campus Russas, Federal University of Ceara, Russas 62900-000, Brazil.

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|August 26, 2022
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Summary

Early detection of structural corrosion using optical fiber Bragg grating (FBG) sensors offers a cost-effective alternative to traditional methods. This study demonstrates an FBG system effectively monitors metal thickness loss, enabling timely structural rehabilitation.

Keywords:
corrosionfiber Bragg gratingsmetallic structureoptical sensors

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Area of Science:

  • Materials Science
  • Structural Engineering
  • Corrosion Engineering

Background:

  • Corrosion significantly impacts structural integrity and incurs high rehabilitation costs.
  • Early detection through structural health monitoring (SHM) is crucial for cost reduction.
  • Current corrosion sensor technology and implementation costs limit widespread field application.

Purpose of the Study:

  • To propose and evaluate an optical fiber Bragg grating (FBG)-based sensing system for monitoring corrosion-induced thickness loss in metallic structures.
  • To assess the system's reliability and functionality compared to traditional methods.

Main Methods:

  • An FBG-based sensing system was developed to monitor a 1020 carbon steel plate under controlled corrosion.
  • The natural frequency of the plate was measured over 3744 hours.
  • Ultrasound and electrochemical tests were conducted for validation.

Main Results:

  • The FBG sensing system reliably tracked the thickness loss of the carbon steel plate due to corrosion.
  • Experimental results demonstrated adequate reliability and functionality.
  • The proposed system showed comparable performance to traditional ultrasonic and electrochemical methods.

Conclusions:

  • The proposed FBG-based sensing system is a suitable and reliable tool for monitoring corrosion-induced thickness loss in metallic structures.
  • This technology offers a promising alternative for SHM, potentially reducing structural rehabilitation costs.