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:
Sep. 25, 2001
Filed:
May. 18, 2000
YuPo J. Lin, Westmont, IL (US);
Edward J. St. Martin, Libertyville, IL (US);
James R. Frank, Glen Ellyn, IL (US);
Daniel H. Pope, Bayfield, CO (US);
The University of Chicago, Chicago, IL (US);
Abstract
An electrode design is provided for corrosion monitoring using electrochemical noise measurements. Electrochemical probes are used for sensing electrochemical noise voltage values and electrochemical noise current values. The electrochemical probes include a pair of working electrodes formed of the same material of the monitored metal pipes or storage vessels and a reference electrode formed of a corrosion resistant material. Each of the pair of working electrodes has a defined surface roughness. One of the pair of working electrodes has reduced roughness, whereby sensitivity to sustained localized pitting corrosion is increased in the working electrode with reduced roughness. By reducing the surface roughness of one of the pair of working electrodes, increased sensitivity to sustained localized pitting corrosion is provided while the current noise can be used to accurately measure the general corrosion rate on the unpolished electrode.