Method of detecting a cathodic corrosion site on a metallized substrate
US4278508A · kind A · utility
14Cited by
7References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 13, 1979 |
| Grant date | Jul 14, 1981 |
| Priority date | — |
| Expiry date | Nov 13, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N17/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.