Method and apparatus for analyzing the state of protection against corrosion of a work under cathodic protection
US5318678A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 26, 1991 |
| Grant date | Jun 7, 1994 |
| Priority date | — |
| Expiry date | Dec 26, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23F2213/32
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A study is made of the changeover time of the voltage between an electrode and a metal work piece buried in the ground and protected against corrosion by an electric current. For this study, it is intended momentarily to interrupt the circulation of the protective current, to read the voltage between the work piece and the electrode, to pass these readings to an analog filter, to smooth these filtered signals by substituting them with values corresponding to a continuous and monotonic postulated function, and then to mathematically reconstruct the change in the voltage signals between the work piece and electrode such as it would be without filtering.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.