Patent Number: 7,713,405

Title: Quantitative transient analysis of localized corrosion

Abstract: An electrochemical noise method, apparatus and system may be used to estimate and/or calculate parameters of interest related to corrosion rates of an electrically conductive article. The apparatus involves a working electrode (having substantially the same composition of the electrically conductive article), a reference electrode, and a counter electrode in an environment of interest. The working electrode is placed under potentiostatic control. A current transient between the working electrode and the counter electrode is measured. The working electrode is switched to open potential. A potential transient is measured over the duration of a localized corrosion event. The localized corrosion may then be calculated based on the measured potential transient and the current transient.

Inventors: Jovancicevic; Vladimir (Richmond, TX), Menendez; Carlos M. (Houston, TX), Hammonds; Paul (Katy, TX), Mok; Wai Yeung (Manchester, GB)

Assignee: Baker Hughes Incorporated

International Classification: G01N 17/04 (20060101)

Expiration Date: 5/11/12018