MEETING NOTICE
October 7, 2010
Date:October 7, 2010
Time:6:00 PM
Place:Crowne Plaza Hotel (Formerly Holiday Inn)
4700 Street Road
Trevose, PA
Price:$25.00
Speaker:Miguel Gonzalez, Mistras Group, Inc.
Subject:Correlation between Active Corrosion and Acoustic Emission signals detection.
RSVP:Tony Gatti @ 267-251-8808
Acoustic emission has proved to be a promising and real technique to detect active corrosion. In order to be more precise about the early detection of corrosion activity, some experiments have been done at the RC&A facilities in PAC Headquarters. Corrosion experiments have been carried out on an aluminum beam in order to measure their corrosion rates and establish their correlation between the variation of the polarization resistance and the AE activity.
With the aim of a potentiostat and a sweep generator system, variation of the corrosion potential was carried out on a corrosion cell containing a 5% NaCl solution in order to establish the limits for the onset of corrosion around the free corrosion potential (Ecorr) of the specimens. Once these limits were determined, an R15I AE sensor was mounted on the plate to detect acoustic emission activity as the potential scan was carried out. After some test it was analyzed the characteristic burst signals detected during the occurrence of corrosion. The corrosion signals were detected between 28 dBAE and 45 dBAE.
The second step of this work will be to correlate the corrosion rate applying different potential and measuring the linear polarization resistance with the acoustic emission activity and intensity.
ABOUT THE SPEAKER: Miguel Gonzalez received his undergraduate degree for Metallurgy in Mexico and obtained his Masters of Science and PhD in the area of Corrosion from the Corrosion and Protection Centre at The University of Manchester, UK.
Miguel has spent the past 12 years researching corrosion and cathodic protection at Pemex facilities. He continued on his work of cathodic protection by focusing on the development of a remote wireless system on buried pipelines. Most recently, Miguel has expanded on the application of electrochemical techniques to understand several types of corrosion.
As the Research Scientist for RC&A, Miguel will work closely with the Universities of Miami, South Carolina and Virginia on the NIST-TIP project in direct relation to the development of a Self Powered Wireless Sensor Network for Structural Health Prognosis. He will also be working on a NSF proposal with Los Gatos Research for the development of a novel wireless sensor network system, capable of measuring stress and corrosion in metallic and concrete structures.
YEARBOOK
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