Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Nondestructive evaluation of incipient corrosion in a metal beneath paint by second-harmonic tomography

Not Accessible

Your library or personal account may give you access

Abstract

A second-harmonic optical scanning imaging method for nondestructive evaluation of corrosion of painted metals is demonstrated. Two-dimensional images of the sectional structure from a sample of painted metal with corrosion were obtained by detection of second-harmonic generation (SHG). The second-harmonic signals generated from paint, corrosion, and metal can be spatially imaged in 10µm sliced subsurface layers. Corroded metal layers covered with paint are found to have more intensity variation than normal polished metal. The spatial mapping of the second-harmonic signals shows depth differentiation of paint, corrosion, and metal surfaces. The depth of corrosion beneath the paint can be measured from the SHG images.

© 2000 Optical Society of America

Full Article  |  PDF Article
More Like This
Detection of corrosion beneath a paint layer by use of spectral polarization optical imaging

J. H. Ali, W. B. Wang, P. P. Ho, and R. R. Alfano
Opt. Lett. 25(17) 1303-1305 (2000)

Confocal enhanced optical coherence tomography for nondestructive evaluation of paints and coatings

Faming Xu, Haridas E. Pudavar, Paras N. Prasad, and David Dickensheets
Opt. Lett. 24(24) 1808-1810 (1999)

Second-harmonic tomography of tissues

Yici Guo, P. P. Ho, H. Savage, D. Harris, P. Sacks, S. Schantz, Feng Liu, N. Zhadin, and R. R. Alfano
Opt. Lett. 22(17) 1323-1325 (1997)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (3)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved