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:
Mar. 30, 2010
Filed:
Oct. 31, 2005
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
An electrochemical noise method, apparatus and system calculates parameters of interest related to corrosion rates of an electrically conductive article. The method involves placing a test electrode, a reference electrode, and an auxiliary electrode in an environment of interest; placing the test electrode under potentiostatic control regime for a potential scan; measuring the relationship of current v. potential (polarization resistance, R) of the test electrode relative to the reference electrode during a first period; switching from potentiostatic control to the open circuit potential (OCP) of the test electrode; monitoring the OCP of the test electrode during a second period; determining ΔI from the relationship R=ΔV/ΔI, where ΔV is measured over a second period of time; and calculating the localized corrosion from the measured potential and current data.