Electrode design for corrosion monitoring using electrochemical noise measurements

Patent · Tue Sep 25 04:00:00 EDT 2001

OSTI ID:1531439

Lin, YuPo J.; St. Martin, Edward J.; Frank, James R.; Pope, Daniel H.

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.

• Research Organization: Univ. of Chicago, Chicago, IL (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-31109-ENG-38
• Assignee: The University of Chicago (Chicago, IL)
• Patent Number(s): 6,294,074
• Application Number: 09/573,575
• OSTI ID: 1531439
• Country of Publication: United States
• Language: English

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