SIM Inauguration Day of the Local Electrochemical Lab

Transcription

1 SIM Inauguration Day of the Local Electrochemical Lab By Research Group Electrochemical and Surface Engineering, Vrije Universiteit Brussel May 9th, 2012 Auditorium Paul-Janssens, Building K Vrije Universiteit Brussel Pleinlaan 2, 1050 Brussels Belgium Sponsored by: Scientific Research Community of the Research Foundation Flanders (FWO) Tuning the functional properties of nanoparticles and nanowires K.U.Leuven, Laboratorium voor Vaste-Stoffysica en Magnetisme (VSM) Universiteit Antwerpen, Theorie van de Gecondenseerde Materie (TGM) Universiteit Antwerpen, Theoretische Fysica van de Vaste Stoffen (TFVS) IMEC, Nanoenabled systems (NEXTNS) Universiteit Hasselt, Instituut voor Materiaalonderzoek (IMO) Vrije Universiteit Brussel, Electrochemical and Surface Engineering (SURF)

2 Timeline 9:00 10:00 Registration and welcome coffee Morning session (Chairperson: H.Terryn) 10:00 10:05 Welcome word 10:05 10:35 Iris De Graeve (Vrije Universiteit Brussel): Self-healing coatings for the corrosion protection of metals 10:35 11:05 Alexandre Bastos (University of Aveiro): The Scanning Vibrating Electrode Technique 25 min coffee break 11:30 12:00 Sviatlana Lamaka (Technical University of Lisbon): Scanning Ion-selective Electrode Technique: The Power and Pitfalls 12:00 12:30 Yaiza Gonzalez-Garcia (Delft University of Technology): Scanning electrochemical microscopy (SECM): a powerful tool for in-situ study of electrochemical and corrosion processes 12:30 14:00 lunch break Afternoon session (Chairperson: A. Hubin) 14:00 14:30 Thibault Muselle (Vrije Universiteit Brussel): Electrochemical Impedance Spectroscopy Measurements Combined with AFM 14:30 15:00 Vincent Vivier (Université Pierre et Marie Curie): Towards local electrochemical impedance spectroscopy for the investigation of corrosion processes on a local scale 15:00 15:30 Hugh Isaacs (Brookhaven National Laboratory): Differential Video Imaging of Corroding Surfaces 15:30 15:45 Inauguration speech by G. Verhoeven (SIM) 16:00 17:30 Reception at SURF Group, 4th floor Building G 16:00 18:00 Visits of the Local Electrochemistry Lab, 5th floor Building G 18:00 End Scientific Research Community of the Research Foundation Flanders (FWO) Tuning the functional properties of nanoparticles and nanowires K.U.Leuven, Laboratorium voor Vaste-Stoffysica en Magnetisme (VSM) Universiteit Antwerpen, Theorie van de Gecondenseerde Materie (TGM) Universiteit Antwerpen, Theoretische Fysica van de Vaste Stoffen (TFVS) IMEC, Nanoenabled systems (NEXTNS) Universiteit Hasselt, Instituut voor Materiaalonderzoek (IMO) Vrije Universiteit Brussel, Electrochemical and Surface Engineering (SURF)

3 Self-healing coatings for the corrosion protection of metals I. De Graeve Vrije Universiteit Brussel, Research Group Electrochemical and Surface Engineering, Pleinlaan 2, 1050 Brussels, Belgium The use of self-healing polymers as coating materials on metals is a relative new approach to enhance corrosion protection. Various self-healing polymer systems are being explored, and their combination with incorporated active corrosion inhibitors results in multiple action self-healing coating systems: the inhibitor passivates the metal when the coating is damaged in a corrosive environment, and the coating material itself can heal resulting in defect closure at a local damage site. To study these healing mechanisms various surface analytical and electrochemical methods are used. Especially for the study of the local healing mechanisms at defect sites, local electrochemical methods, such as Scanning Electrochemical Microscopy (SECM), the Scanning Vibrating Electrode Technique (SVET) and local Electrochemical Impedance Spectroscopy (EIS), are being explored and developed.

4 The Scanning Vibrating Electrode Technique A. C. Bastos CICECO / Department of Ceramics and Glass Engineering, University of Aveiro, Portugal The Scanning Vibrating Electrode Technique SVET in the abbreviated form uses a vibrating microelectrode to measure the electrical field in solution associated to the ionic fluxes originated by electrochemical reactions at corroding metal surfaces or by metabolic processes in biological cells and tissues. The results are usually reported as maps of ionic current densities crossing the plane of measurement. For long reference electrodes have been applied in the corrosion field to map potential distribution in solution [1-3]. Vibrating electrodes, however, are much more sensitive and were developed by biologists to study ionic fluxes in biological systems [4-7], being introduced to the corrosion field in the 1980 s [8-10]. This presentation gives a brief introduction to the SVET technique and is divided in 4 moments: (1) the measurement of potential and current in solution and the functioning of SVET; (2) an historical overview of SVET; (3) selected results in corrosion and biology; (4) going further, the coupling of SVET with other techniques. References 1. U.R. Evans, Metal Ind. 29 (1926) W. Jaenicke, K. F. Bonhoefer, Z. Phys. Chemie A 193 (1944) I. R. Copson, Trans. Electrochem. Soc. 84 (1960) O. Bluh, B. Scott, Rev. Sci. Inst. 10 (1950) W. P. Davies, Fed. Proc. 25, Abstract 801 (1966) L. F. Jaffe, R. Nucitelli, J. Cell Biology 63 (1974) C. Scheffey, Rev. Sci. Instrum. 59 (1988) H. S. Isaacs, Y. Ishikawa, Applications of the Vibrating Probe to Localized Current Measurements, in Electrochemical Techniques for Corrosion Enginnering, R. Baboian (Ed.), NACE, Houston, H. S. Isaacs, Corros. Sci. 28 (1988) H. S. Isaacs, A. Shipley, A. J. Davenport, J. Electrochem. Soc, 138 (1991) 390

5 Scanning Ion-selective Electrode Technique: The Power and Pitfalls S. Lamaka ICEMS, Instituto Superior Técnico, Technical University of Lisbon, Portugal Identification and quantification of chemical species participating in electrochemical processes sheds light on the chemical aspects of electrochemical reactions, thus clarifying their mechanisms. Ion-selective microelectrodes are unique tools that enable one to provide information about localized activity of specific ions in solution (e.g. H +, Mg 2+, Zn 2+, Al 3+, Na + and Cl - ). The micro-potentiometric measurements with ion-selective microelectrodes can be performed using SIET and SECM in potentiometric mode. The lecture will introduce the basics of micro-potentiometry, disclose the limitations and pitfalls of SIET and gives an overview with various application examples essential for material science.

6 Scanning electrochemical microscopy (SECM): a powerful tool for in-situ study of electrochemical and corrosion processes Y. Gonzalez-Garcia Corrosion Technology and Electrochemistry Group, MP2 Department, Delft University of Technology, Delft, The Netherlands SECM is the scanning micro-electrochemical method for definition. By using an ultra -microelectrode as probe, the SECM provides topology, kinetic and chemical/ electrochemical information, in-situ and with high-spatial resolution of the processes taking place at the solution/specimen interface. Study and evaluation of earlystages of organic coating degradation, in-situ monitoring of breakdown of the passive film on stainless steel, micro-deposition of metals, study of local catalytic activities are just few examples of the possible applications of this technique.

7 Electrochemical Impedance Spectroscopy Measurements Combined with AFM T.Muselle Vrije Universiteit Brussel, Research Group Electrochemical and Surface Engineering, Pleinlaan 2, 1050 Brussels, Belgium The combination of a setup for electrochemical impedance spectroscopy with an atomic force microscope (AFM) allows, first of all, performing local electrochemical impedance spectroscopy (LEIS) measurements. Second of all, these measurements are combined with AFM, performed throughout the exact same area of a sample. Consequently, topographic features can be linked with their electrochemical behavior. A typical AFM setup is used in combination with a potentiostat and a lock-in amplifier. These two additional devices are necessary for the electrochemical measurements. A modified AFM probe, having two extremities, is used for these measurements. One extremity acts as the tip of a regular AFM probe, allowing topographic measurements. The addition of a second one allows measuring a potential in the solution, as required for the LEIS measurements.

8 Towards local electrochemical impedance spectroscopy for the investigation of corrosion processes on a local scale V. Vivier Laboratoire Interfaces et Systèmes Électrochimiques (UPR15 du CNRS) 4 place Jussieu Paris France Local electrochemical impedance spectroscopy (LEIS) provides a powerful way for investigating the local reactivity of an interface. In this presentation, a short review of the advantages and the limitations of LEIS will be given. A special attention will be paid to experimental setup and the spatial resolution that can be reached. Then, some recent applications of the technique for the study of corrosion (galvanic coupling, pitting corrosion ) will be discussed in more details.

9 Differential Video Imaging of Corroding Surfaces H. S. Isaacs Chemistry Department, Brookhaven National Laboratory, Upton, NY 11973, USA The Differential Video Imaging (DVIT) technique employs digital imaging to locate the changes in the surface brought about by corrosion processes. The method consists of recording a series of images and subtracting them in real time to assist in locating where changes are taking place and also the nature of the corrosion. Generally electrochemical methods are also studied during the experiments. The potential and current are stored so the correlation with the surface changes are easily made when corrosion initiates or stops following any additional environmental variable as for example the addition of an inhibitor. The technique also includes the software to monitor specific colors or the spectrum of the colors important in the growth of oxide films. In addition to the principles of the technique and the cells employed, the presentation will include investigations of localized corrosion, the use of indicators, and behavior of welds.

10 Speakerslist in alphabetical order Name Affiliation Contact Alexandre C. Bastos Iris De Graeve Yaiza Gonzalez- Garcia Hugh S. Isaacs Svetlana Lamaka Thibault Muselle Vincent Vivier CICECO / Department of Ceramics and Glass Engineering, University of Aveiro, Portugal Vrije Universiteit Brussel, Research Group Electrochemical and Surface Engineering (SURF) Pleinlaan 2, 1050 Brussels, Belgium Corrosion Technology and Electrochemistry Group, MP2 Department, Delft University of Technology, Delft, The Netherlands Chemistry Department, Brookhaven National Laboratory, Upton, NY 11973, USA ICEMS, Instituto Superior Técnico, Technical University of Lisbon, Portugal Vrije Universiteit Brussel, Research Group Electrochemical and Surface Engineering (SURF), Pleinlaan 2, 1050 Brussels, Belgium Laboratoire Interfaces et Systèmes Électrochimiques (UPR15 du CNRS), 4 place Jussieu, Paris, France acbastos@ua.pt Tel/Fax: (+351) idgraeve@vub.ac.be Y.GonzalezGarcia@tudelft.nl isaacs@bnl.gov sviatlana.lamaka@ist.utl.pt tmuselle@vub.ac.be vincent.vivier@upmc.fr

11 If you have any questions, please contact: Alexander Lutz Research Group Electrochemical and Surface Engineering, Vrije Universiteit Brussel 1050 Brussel Belgium +32 (0) Special thanks to our sponsors: Scientific Research Community of the Research Foundation Flanders (FWO) Tuning the functional properties of nanoparticles and nanowires K.U.Leuven, Laboratorium voor Vaste-Stoffysica en Magnetisme (VSM) Universiteit Antwerpen, Theorie van de Gecondenseerde Materie (TGM) Universiteit Antwerpen, Theoretische Fysica van de Vaste Stoffen (TFVS) IMEC, Nanoenabled systems (NEXTNS) Universiteit Hasselt, Instituut voor Materiaalonderzoek (IMO) Vrije Universiteit Brussel, Electrochemical and Surface Engineering (SURF)

12 Symposium: Auditorium Paul-Janssens, Building K, 2nd floor Lunch: Convivium, Building R, 1st floor Reception and Local Electrochemistry Lab: Building G, 4th and 5th floor Scientific Research Community of the Research Foundation Flanders (FWO) Tuning the functional properties of nanoparticles and nanowires K.U.Leuven, Laboratorium voor Vaste-Stoffysica en Magnetisme (VSM) Universiteit Antwerpen, Theorie van de Gecondenseerde Materie (TGM) Universiteit Antwerpen, Theoretische Fysica van de Vaste Stoffen (TFVS) IMEC, Nanoenabled systems (NEXTNS) Universiteit Hasselt, Instituut voor Materiaalonderzoek (IMO) Vrije Universiteit Brussel, Electrochemical and Surface Engineering (SURF)