Device for in situ monitoring of corrosion rates of polarized or unpolarized metals
CA 1293770 C · Owner: Syrett, Barry Christopher · Inventors: Mckubre, Michael Charles Harold; Syrett, Barry Christopher
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A technique for electrochemical measurement of the corrosion current (corrosion rate) is disclosed. The electrochemical parameters that are necessary to calculate the corrosion rate are contained in the harmonic current response to a moderate amplitude sinusoidal voltage perturbation applied to the corroding metallic component. The harmonic current response is analyzed at frequencies 1f, 2f, 3f, 4f, 5f and the rectification current response at DC current to the presence of a 20-50 mV AC voltage perturbation at a frequency f. The free corrosion current density, the free corrosion potential and the Tafel coefficients are calculated. The Tafel coefficient or Tafel slope is a measure of the …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted December 31, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 31, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.