G - Physics – 01 – N
Patent
G - Physics
01
N
324/28
G01N 17/00 (2006.01) G01N 17/02 (2006.01)
Patent
CA 1245720
A CORROSION PROBE AND METHOD FOR MEASURING CORROSION RATES Abstract of the Disclosure A corrosion probe having in combination at least one first, at least one second, and at least one third electrode. A dielectric is positioned between the electrodes, and the dielectric has a structure defining an ionically conductive surface. An apparatus for measuring the corrosion rates of metals, or the like, in a corrosive liquid environment comprising the corrosion probe, a potentiostat electrically attached to the electrodes of the corrosion probe, and a signal generator electrically communicating with the potentiostat. The apparatus also has a volt meter and an amp meter. A process for measuring the corrosion rates of metals in a corrosive liquid environment comprising attaching electrically the corrosion probe to a potentiostat. The ohmic resistance between the first and the second electrode is known, and the electromotive force between the second electrode and an area in a surrounding fluid in general microscopic proximity thereto is also known. The corrosion probe is inserted into the corrosive liquid environment and either a predetermined known amperage is signaled to the potentiostat or a predetermined known difference in potential is signaled to the potentiostat. If a predetermined known amperage is signaled, the potentiostat transmits this amperage through the first and third electrodes of the corrosion probe. The electromotive force between the first and second electrode is measured, while the electromotive force between an area in the corrosive liquid environment in general microscopic proximity to the first electrode and an area in the corrosive liquid environment in general microscopic proximity to the second electrode is calculated. An electromotive force between the first electrode and an area in the corrosive liquid environment in general microscopic proximity to the first electrode is determined. The corrosion current is computed from the determined electromotive force and the predetermined known amperage. If a predetermined known difference in potential is signaled, the potentiostat transmits this difference in potential through the first and second electrodes of the corrosion probe. The amperage between the first and third electrodes is measured, while the electromotive force between an area in the corrosive liquid environment in general microscopic proximity to the first electrode and an area in the corrosive liquid environment in general microscopic proximity to the second electrode is calculated. An electromotive force between the first electrode and an area in the corrosive liquid environment in general microscopic proximity to the first electrode is determined. The corrosion current is computed from the determined electromotive force and the measured amperage. -2-
489752
Cities Service Oil And Gas Corporation
Smart & Biggar
LandOfFree
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