“sim inauguration day of the local electrochemical lab”vubtechtransfer.be/medialibrary/sim...

“SIM Inauguration Day

of the Local Electrochemical Lab”

May 9th, 2012

Auditorium Paul-Janssens,

Building K Vrije Universiteit Brussel

Pleinlaan 2, 1050 Brussels

Belgium

By Research Group Electrochemical and Surface Engineering,

Vrije Universiteit Brussel

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)

Sponsored by:

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 Com- bined 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

Self-healing coatings for the corrosion protection of metals

I. De Graeve

Vrije Universiteit Brussel, Research Group Electrochemical and Surface En-gineering, 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 inhibi-

tors 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 Electrochemi-

cal Impedance Spectroscopy (EIS), are being explored and developed.

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 report-

ed as maps of ionic current densities crossing the plane of measurement.

For long reference electrodes have been applied in the corrosion field to map po-

tential distribution in solution [1-3]. Vibrating electrodes, however, are much more

sensitive and were developed by biologists to study ionic fluxes in biological sys-

tems [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 func-

tioning 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) 481 2. W. Jaenicke, K. F. Bonhoefer, Z. Phys. Chemie A 193 (1944) 301 3. I. R. Copson, Trans. Electrochem. Soc. 84 (1960) 29 4. O. Bluh, B. Scott, Rev. Sci. Inst. 10 (1950) 867 5. W. P. Davies, Fed. Proc. 25, Abstract 801 (1966) 332 6. L. F. Jaffe, R. Nucitelli, J. Cell Biology 63 (1974) 269 7. C. Scheffey, Rev. Sci. Instrum. 59 (1988) 787 8. H. S. Isaacs, Y. Ishikawa, Applications of the Vibrating Probe to Localized Current Measure-ments, in Electrochemical Techniques for Corrosion Enginnering, R. Baboian (Ed.), NACE, Houston, 1986 9. H. S. Isaacs, Corros. Sci. 28 (1988) 547 10. H. S. Isaacs, A. Shipley, A. J. Davenport, J. Electrochem. Soc, 138 (1991) 390

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 solu-

tion (e.g. H+, Mg2+, Zn2+, Al3+, Na+ and Cl-). The micro-potentiometric measurements

with ion-selective microelectrodes can be performed using SIET and SECM in poten-

tiometric mode. The lecture will introduce the basics of micro-potentiometry, dis-

close the limitations and pitfalls of SIET and gives an overview with various applica-

tion examples essential for material science.

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 process-

es taking place at the solution/specimen interface. Study and evaluation of early-

stages of organic coating degradation, in-situ monitoring of breakdown of the pas-

sive film on stainless steel, micro-deposition of metals, study of local catalytic activi-

ties are just few examples of the possible applications of this technique.

Electrochemical Impedance Spectroscopy Measurements Com-

bined with AFM

T.Muselle

Vrije Universiteit Brussel, Research Group Electrochemical and Surface En-gineering, 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 behav-

ior.

A typical AFM setup is used in combination with a potentiostat and a lock-in amplifi-

er. These two additional devices are necessary for the electrochemical measure-

ments. A modified AFM probe, having two extremities, is used for these measure-

ments. 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.

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 – 75005 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 cou-

pling, pitting corrosion…) will be discussed in more details.

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 con-

sists 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. Gen-

erally electrochemical methods are also studied during the experiments. The poten-

tial and current are stored so the correlation with the surface changes are easily

made when corrosion initiates or stops following any additional environmental vari-

able 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 .

Speakerslist in alphabetical order

Name Affiliation Contact

Alexandre C. Bastos

CICECO / Department of Ceram-ics and Glass Engineering,

University of Aveiro, Portugal

[email protected]

Tel/Fax: (+351) 234378146

Iris De Graeve

Vrije Universiteit Brussel, Re-search Group Electrochemical and Surface Engineering (SURF)

Pleinlaan 2, 1050 Brussels, Bel-gium

[email protected]

Yaiza Gonzalez-Garcia

Corrosion Technology and Elec-trochemistry Group, MP2 Depart-ment, Delft University of Technol-ogy, Delft, The Netherlands

[email protected]

Hugh S.

Isaacs

Chemistry Department , Brookha-

ven National Laboratory,

Upton, NY 11973, USA

[email protected]

Svetlana

Lamaka

ICEMS, Instituto Superior Téc-

nico, Technical University of Lis-

bon, Portugal

[email protected]

Thibault Muselle

Vrije Universiteit Brussel, Re-

search Group Electrochemical

and Surface Engineering (SURF),

Pleinlaan 2, 1050 Brussels, Bel-

gium

[email protected]

Vincent

Vivier

Laboratoire Interfaces et Sys-

tèmes Électrochimiques (UPR15

du CNRS),

4 place Jussieu, 75005 Paris,

France

[email protected]

mailto:[email protected]

Special thanks to our sponsors:

If you have any questions, please contact:

Alexander Lutz

[email protected]

Research Group Electrochemical

and Surface Engineering,

Vrije Universiteit Brussel

1050 Brussel

Belgium

+32 (0)2 629 3279






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






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