Transient electromagnetic method for detecting corrosion on conductive containers
US4843320A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 17, 1987 |
| Grant date | Jun 27, 1989 |
| Priority date | — |
| Expiry date | Dec 17, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B7/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
There is disclosed a method for detecting corrosion on the walls of conductive containers wherein a transmitting antenna induces a current into a portion of the container wall and the decay of the induced current is detected by a receiving antenna, with a record of the decay of the induced current being created. The record is interpreted to determine the thickness of the container wall portion and the presence or absence of corrosion is inferred. One method of interpretation uses reference records from container walls having known parameters for comparison. Another method of interpretation examines the times that the induced current reaches the container wall portion surface that is farthest from the antennas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.