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Embedded Corrosion Instrument

The ECI-1 is an innovative embedded corrosion monitoring instrument for steel-reinforced concrete structures. It includes electrodes, electronics, and digital network interface in a single package.

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Embedded Corrosion Instrument

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  1. Embedded Corrosion Instrument Presented By: ElectraWatch, Inc. Presented To: Vanasse Hangen Brustlin, Inc. www.electrawatch.com

  2. Model ECI-1 Embedded Corrosion Monitoring Instrument An Innovative Approach to Long Term Corrosion Monitoring in Steel Reinforced Concrete Structures (U.S. Patent 6,690,182 and Foreign Patents Pending) www.electrawatch.com

  3. The ECI-1 Development Team • Dr. Robert G. Kelly – Professor of Materials Science and Engineering, University of Virginia (rgkelly@virginia.edu) • Mr. Robert A. Ross – Electrical Engineering and President, Virginia Technologies, Inc. (ross@vatechnologies.com) • Mr. J. Kurt Hudson – Electrical Engineering and Laboratory Engineer, Virginia Technologies, Inc. (kurth@vatechnologies.com) www.electrawatch.com

  4. What is the ECI-1 • The ECI-1 is a fully embeddable instrument for monitoring corrosion of reinforcement steel in concrete structures. • The ECI-1 is a self contained instrument including electrodes, electronics, and digital network interface all contained in a single embedded package. • As compared to other products, the ECI-1 is not simply a “corrosion probe.” www.electrawatch.com

  5. ECI-1 Corrosion Measurement Parameters • ECI-1 Measurement Types: • Polarization Resistance • Resistivity • Open Circuit Potential • Chloride Level • Temperature www.electrawatch.com

  6. www.electrawatch.com

  7. ECI-1 Cutaway View www.electrawatch.com

  8. The Advantages of Local Electronics • The ECI-1 approach allows the leads connecting the low level analog electrode signals to the signal processing electronics to be kept short (approximately 1 inch). • Short analog signal leads allow for a higher signal to noise ratio and more accurate and repeatable measurements. • Other “corrosion probe” products produce analog signals that can be interrogated using electronic devices external to the structure. Since these signals are analog, the useful connection length is limited. www.electrawatch.com

  9. ECI-1 Network Communications • Each ECI-1 instrument is a digital peripheral connected on an embedded local area network (LAN). Each LAN connection can be up to 200 feet in length. • Each instrument communicates with an external datalogger using the industry standard SDI-12 protocol. • Digital networks are highly resistant to data corruption from nearby EMI sources such as power lines, radios, and cell phones. www.electrawatch.com

  10. Embedded Network of Instruments www.electrawatch.com

  11. www.electrawatch.com

  12. ECI-1 Laboratory Test Data www.electrawatch.com

  13. Presentation Outline www.electrawatch.com

  14. Laboratory Data: Hours of Chloride Ion Driving Per Day www.electrawatch.com

  15. Laboratory Data: Chloride Voltage vs. Day www.electrawatch.com

  16. Laboratory Data: Resistivity vs. Day www.electrawatch.com

  17. Laboratory Data: LPR vs. OCP Comparison www.electrawatch.com

  18. ECI-1 Field Data www.electrawatch.com

  19. Bridge Installation, B623 Lynchburg, VA • Installed March 28th, 2002. • Concrete Poured April 22nd, 2002. • Data collected May 26th, 2002 through present. • 4 ECI-1 units installed. • Campbell Scientific CR510 Datalogger. • Power Supply: 12 V battery and 10 Watt Solar Panel to Maintain Charge. • Telecommunications via Cellular Phone and Modem and Yagi antenna. www.electrawatch.com

  20. ECI Installation in Lynchburg, VA www.electrawatch.com

  21. Solar Panel and Cellular Antenna www.electrawatch.com

  22. Solar Panel and Cellular Antenna www.electrawatch.com

  23. Datalogger Mounted Under Bridge www.electrawatch.com

  24. Electronics vs. Temperature LPR Measurement with Resistor Dummy Cells www.electrawatch.com

  25. Electronics vs. Temperature Resistivity Measurement with Resistor Dummy Cells www.electrawatch.com

  26. Field Data: Temperature vs. Day www.electrawatch.com

  27. Field Data: Resistivity vs. Temperature www.electrawatch.com

  28. Field Data: Resistivity vs. Day www.electrawatch.com

  29. Field Data: Chloride Voltage vs. Temperature www.electrawatch.com

  30. Field Data: Chloride Voltage vs. Day www.electrawatch.com

  31. Field Data: Temperature Corrected Chloride Voltage vs. Day www.electrawatch.com

  32. Field Data: Open Circuit Potential (OCP) vs. Temperature www.electrawatch.com

  33. Field Data: OCP vs. Day www.electrawatch.com

  34. Field Data: Linear Polarization Resistance (LPR) vs. Temperature www.electrawatch.com

  35. Field Data: LPR and OCP vs. Days After Concrete Pour www.electrawatch.com

  36. ECI-1 Product Milestones • Lab testing of prototype completed in 2001. • Field testing of commercial prototype began in 2nd quarter of 2002 (Rt. 460 bypass bridge, Lynchburg, VA) • U.S. Patent #6,690,182 issued. Chinese Patent issued. • International distributors established in Hong Kong, Northern China, and Singapore. www.electrawatch.com

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