Electrode for corrosion test
Abstract
Abstract An electrode for use in a corrosion test probe assembly, especially in polarization measurements such as described in U.S. Pat. No. 3,406,101. The electrode comprises a metallic (1,020 mild steel) cylindrical rod. An axial bore extends into one end of the rod which carries an annular end sealing surface arranged to engage a fluid seal with fluid tightness. The bore has an enlarged cylindrical portion adjacent the sealing surface, a reduced diameter threaded portion and a further reduced cylindrical portion which terminates in an abutting surface. The rod has a substantially smooth exterior side and imperforate end surfaces exposed to a corrodant, and these surfaces are prepared so that the actual and mathematically derived surface areas on the rod are substantially identical relative to a certain surface area desired in the polarization measurement with which the rod is to be employed. Each electrode will have identical characteristics in the polarization measurement so electrode replacements do not require instrument recalibration nor aging into identical responses in a corrodant.
Inventors
- 👤 H Wilson
Bibliographic Details
Claims Analysis
Total Claims: 4References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |