Share Email Print
cover

Proceedings Paper

Observation of actual pitting corrosions by photoacoustic imaging
Author(s): Yoichiro Hiwatashi; Haruo Endoh; Tsutomu Hoshimiya
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

In this study, imaging of the actual pitting corrosions by photoacoustic microscope (PAM) has been demonstrated for the first time. Two types of the actual pitting corrosions are generated by immersion and electrochemical method. Immersion tests are conducted in sodium chloride aqueous solutions for pure aluminum plate. Electrochemical method are conducted by electrolysis under the continuous electrode with potentiostatt in sodium chloride aqueous solutions for pure aluminum plate. Nondestructive measurement of pitting corrosions was carried out with PAM and simultaneous measurement of amplitude and phase of the photoacoustic (PA) signal at every point of scanning is carried out, and the PA amplitude and phase images are obtained. The PA amplitude signal intensity changed with both shape and depth of a pitting corrosions. Phase signal intensity relatively reflected the depth and cross section of a pitting corrosion. Furthermore, comparing of the imaging of the actual pitting corrosions and the simulated pitting made by chemical etching.

Paper Details

Date Published: 7 May 1999
PDF: 4 pages
Proc. SPIE 3740, Optical Engineering for Sensing and Nanotechnology (ICOSN '99), (7 May 1999); doi: 10.1117/12.347747
Show Author Affiliations
Yoichiro Hiwatashi, Tohoku Gakuin Univ. (Japan)
Haruo Endoh, Tohoku Gakuin Univ. (Japan)
Tsutomu Hoshimiya, Tohoku Gakuin Univ. (Japan)


Published in SPIE Proceedings Vol. 3740:
Optical Engineering for Sensing and Nanotechnology (ICOSN '99)
Ichirou Yamaguchi, Editor(s)

© SPIE. Terms of Use
Back to Top