Accession Number:

ADD019823

Title:

Corrosion Detecting and Monitoring Method and Apparatus

Descriptive Note:

PATENT, FILED 14 JUL 95, PATENTED 8 JUL 97

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Report Date:

1997-07-08

Pagination or Media Count:

7.0

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.

Subject Categories:

  • Properties of Metals and Alloys
  • Fiber Optics and Integrated Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE