Aluminum reference electrode
US4764257A · kind A · utility
7Cited by
6References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 3, 1985 |
| Grant date | Aug 16, 1988 |
| Priority date | — |
| Expiry date | Oct 3, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/301
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A stable reference electrode for use in monitoring and controlling the process of electrolytic reduction of a metal. In the case of Hall cell reduction of aluminum, the reference electrode comprises a pool of molten aluminum and a solution of molten cryolite, Na.sub.3 AlF.sub.6, wherein the electrical connection to the molten aluminum does not contact the highly corrosive molten salt solution. This is accomplished by altering the density of either the aluminum (decreasing the density) or the electrolyte (increasing the density) so that the aluminum floats on top of the molten salt solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.