Visually indicating corrosion sensing
US6564620B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 29, 1999 |
| Grant date | May 20, 2003 |
| Priority date | — |
| Expiry date | Jun 29, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N17/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Corrosion sensors and methods of their use for monitoring corrosion of a material of interest. The corrosion sensors are adapted to be placed in the environment containing the material of interest during the period when corrosion is taking place. The corrosion sensors include a power source, a visual indicator and an electrode contained on a support. Changes in the electrical resistance of the electrode facilitate a display on the visual indicator including changes in color or brightness. Some corrosion sensors have power sources activated by directing a light source or other electromagnetic radiation source at the corrosion sensor. Some corrosion sensors have visual indicators containing thermochromic or electrochromic materials that are responsive to changes in voltage drop or current flow across the visual indicator. Some corrosion sensors have tracking devices to provide tracking information about the corrosion sensor. Some corrosion sensors have proximity sensors to inhibit the display on the visual indicator when not in proximity of a trigger.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.