The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 24, 2009
Filed:
Aug. 04, 2006
Raymond Paul Gill, Grange over Sands, GB;
Vladimir Jovancicevic, Richmond, TX (US);
Wai Yeung Mok, Manchester, GB;
Paul Hammonds, Katy, TX (US);
Raymond Paul Gill, Grange over Sands, GB;
Vladimir Jovancicevic, Richmond, TX (US);
Wai Yeung Mok, Manchester, GB;
Paul Hammonds, Katy, TX (US);
Baker Hughes Incorporated, Houston, TX (US);
Abstract
Simultaneous determination of general corrosion and localized corrosion rate measurements is achieved with polarization applied by the electrodes themselves rather than externally applied polarization. Two or more working electrodes may be galvanically coupled. A localized pitting corrosion event on one of the electrodes will lead to a potential transient. The area within the potential transient is measured with the baseline being the initial starting potential. This gives localized corrosion as a function of time. The relationship Rp=ΔV/ΔI is calculated, where Rp is the polarization resistance of the working electrodes and is a measure of generalized corrosion rate.