Method of detecting a cathodic corrosion site on a metallized su

Details Method of detecting a cathodic corrosion site on a metallized su Method of detecting a cathodic corrosion site on a metallized su

1979-11-13

1981-07-14

Gantz, Delbert E.

Chemistry: electrical and wave energy

Processes and products

23230C, 250372, 324 71SN, 324 96, 324158R, G01N 2700

Patent

active

042785081

ABSTRACT:
A method of detecting a cathodic corrosion site on a metallized substrate comprises depositing molecules of a pH sensitive fluorescent dye adjacent a metallic surface of the substrate, the metallic surface having a corrosion site thereon characterized by a reduction of the hydronium ion to hydrogen (2H.sup.+ +2e.sup.- .fwdarw.H.sub.2). An electrical bias is then applied across the metallic surface, and the fluorescent dye is exposed to ultraviolet (UV) radiation, whereby fluorescence is activated at the cathodic corrosion site.

REFERENCES:
patent: 3198715 (1965-08-01), Fowler et al.
patent: 3490873 (1970-01-01), Corl
patent: 3530045 (1970-09-01), Alburger
patent: 3567932 (1971-03-01), Alburger
patent: 3766040 (1973-10-01), Wellborn, Jr.
patent: 4035641 (1977-07-01), Molina
patent: 4237379 (1980-12-01), Deckert et al.
J. Kruger, Use of Ellipsometry in the Study of Corrosion, Corrosion, vol. 22, No. 4 (4/66), p. 88.

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