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

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References

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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef] [PubMed]
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    [CrossRef] [PubMed]
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    [CrossRef]

1999 (2)

1997 (1)

1990 (1)

W. Denk, J. H. Strickler, and W. W. Webb, Science 248, 73 (1990).
[CrossRef] [PubMed]

1985 (1)

D. J. Hagemaier, A. H. Wendelbo, and Y. Bar-Cohen, Mater. Eval. 43, 426 (1985).

1976 (1)

M. de Billy, F. Cohen-Tenoudji, A. Jungman, and G. J. Quentin, IEEE Trans. Sonics Ultrason. SU-23, 356 (1976).
[CrossRef]

1971 (1)

Alfano, R. R.

Bar-Cohen, Y.

D. J. Hagemaier, A. H. Wendelbo, and Y. Bar-Cohen, Mater. Eval. 43, 426 (1985).

Cohen-Tenoudji, F.

M. de Billy, F. Cohen-Tenoudji, A. Jungman, and G. J. Quentin, IEEE Trans. Sonics Ultrason. SU-23, 356 (1976).
[CrossRef]

de Billy, M.

M. de Billy, F. Cohen-Tenoudji, A. Jungman, and G. J. Quentin, IEEE Trans. Sonics Ultrason. SU-23, 356 (1976).
[CrossRef]

Denk, W.

W. Denk, J. H. Strickler, and W. W. Webb, Science 248, 73 (1990).
[CrossRef] [PubMed]

Fine, S.

Fontana, M.

M. Fontana, Corrosion Engineering (McGraw-Hill, New York, 1986).

Frick-Begemann, T.

Gulker, G.

Guo, Y.

Hagemaier, D. J.

D. J. Hagemaier, A. H. Wendelbo, and Y. Bar-Cohen, Mater. Eval. 43, 426 (1985).

Hansen, W. P.

Harris, D.

Hinsch, K. D.

Ho, P. P.

Jungman, A.

M. de Billy, F. Cohen-Tenoudji, A. Jungman, and G. J. Quentin, IEEE Trans. Sonics Ultrason. SU-23, 356 (1976).
[CrossRef]

Liu, F.

Quentin, G. J.

M. de Billy, F. Cohen-Tenoudji, A. Jungman, and G. J. Quentin, IEEE Trans. Sonics Ultrason. SU-23, 356 (1976).
[CrossRef]

Sacks, P.

Savage, H.

Schantz, S.

Shen, Y. R.

Y. R. Shen, Principles of Nonlinear Optics (Wiley, New York, 1984), Chap. 25.

Strickler, J. H.

W. Denk, J. H. Strickler, and W. W. Webb, Science 248, 73 (1990).
[CrossRef] [PubMed]

Webb, W. W.

W. Denk, J. H. Strickler, and W. W. Webb, Science 248, 73 (1990).
[CrossRef] [PubMed]

Wendelbo, A. H.

D. J. Hagemaier, A. H. Wendelbo, and Y. Bar-Cohen, Mater. Eval. 43, 426 (1985).

Wolff, K.

Ying, J.

Zhadin, N.

Appl. Opt. (3)

IEEE Trans. Sonics Ultrason. (1)

M. de Billy, F. Cohen-Tenoudji, A. Jungman, and G. J. Quentin, IEEE Trans. Sonics Ultrason. SU-23, 356 (1976).
[CrossRef]

Mater. Eval. (1)

D. J. Hagemaier, A. H. Wendelbo, and Y. Bar-Cohen, Mater. Eval. 43, 426 (1985).

Opt. Lett. (1)

Science (1)

W. Denk, J. H. Strickler, and W. W. Webb, Science 248, 73 (1990).
[CrossRef] [PubMed]

Other (3)

W. H. Cubberly, ed., Corrosion, Vol. 13 of Metals Handbook Series, 9th ed. (American Society for Metals, Metals Park, Ohio, 1987).

M. Fontana, Corrosion Engineering (McGraw-Hill, New York, 1986).

Y. R. Shen, Principles of Nonlinear Optics (Wiley, New York, 1984), Chap. 25.

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Figures (3)

Fig. 1
Fig. 1

SHG lateral and axial image for a painted polished metal sample. The inset displays the structure of the metal sample.

Fig. 2
Fig. 2

SHG lateral and axial image of a corroded metal sample without paint. The inset displays the structure of the sample.

Fig. 3
Fig. 3

SHG lateral and axial image of the painted corroded metal sample. The inset displays the structure of the sample.

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