Corrosion Detecting and Monitoring Method and Apparatus

Abstract

A nondestructive method and apparatus for optical detection and monitoring corrosion in structures normally inaccessible to light and observation. An optical fiber coated with a corrosion sensitive compound is embedded in the structure. Tapped Bragg gratings of different Bragg periods are spaced along the fiber and refract a narrow bandwidth component of a broad beam light pulse transmitted through the fiber. Due to corrosion, the refracted components are reflected by the compound and their amplitudes are detected and displayed for each narrow bandwidth.

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Document Details

Document Type
Technical Report
Publication Date
Jul 08, 1997
Accession Number
ADD019823

Entities

People

  • Ignacio M. Perez
  • Vinod S. Agarwala

Organizations

  • United States Department of the Navy

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aging (Materials)
  • Amplitude
  • Bandwidth
  • Bragg Gratings
  • Corrosion
  • Detection
  • Detectors
  • Fibers
  • Intensity
  • Light Pulses
  • Light Sources
  • Material Degradation Processes
  • Materials
  • Monitoring
  • Optical Detection
  • Optical Fibers
  • Optical Properties

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Optical Physics and Photonics.
  • Structural Health Monitoring of Composite Structures.

Technology Areas

  • Space