Ruhr-Universität Bochum
 

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SFB459
Research areas
Area A:
Fundamentals
Area B:
Applications & Design
Area C:
Manufacturing & Processing
Area T:
Industry Transfer
 
Degrees
Diploma theses
Ph. D. theses
 
Research Output
Recent Publications
Recent Presentations
 
Shape Memory Technology SFB 459
Special Research Center funded by German Research Foundation DFG
I - Die Uni entdecken II - Die Uni entdecken III - Die Uni entdecken IV - Die Uni entdecken V - Die Uni entdecken
 
Infos : member meetings | staff seminar | Scientific Symposium | Links German 
Investigation of the corrosion... » Area A: Fundamentals » Homepage
 
General information on project A5
 
Subject:
Investigation of the corrosion behaviour of shape memory alloys using scanning electrochemical microscopy
 
Field of investigation:
Electrochemistry, Analytic Chemistry
 
Principal Investigator:
Prof. Dr. rer. nat. Wolfgang Schuhmann
Telephone: (0234) 700-6200
FAX: (0234)7094-683
email: wolfgang.schuhmann@rub.de
web:  http://www.ruhr-uni-bochum.de/elan/
 
Address:
Ruhr-Universität Bochum
Fakultät für Chemie, Lehrstuhl für Analytische Chemie
Group: Elektroanalytik und Sensorik
Universitätsstr. 150
44801 Bochum


Summary/Abstract

Project A5 examines in continuation of the results of the previous support phase, i.e the corrosion and the biocompatibility of NiTi shape memory alloys. Among others, the corrosion resistance is determined via a breakdown potential and the nickel release is analyzed by means of the robotic system developed in the previous support periods. Collaboration with other projects of the SFB arise e.g. from high throughput analysis of bone substitute material which has to be tested for biocompatibility.

In this context, the influence of different surface preparations and thermomechanical treatments of the shape memory materials are also examined.

Additionally, a high corrosion resistance depending on the pretreatment of the SMA has been noted such that further measurements should be done to clarify this phenomenon.

The possibilities regarding local corrosion studies with the newly introduced scanning droplet cell have been demonstrated and will be extended to examine the corrosion resistance of ternary nickel alloys. Here, the application as automated high throughput analysis method for sputtered thin film wafer is envisaged.

In the fourth support period, the AC-SECM technique, which has been fully evaluated in the mean time, should be used to look for corrosion points of failure on the surface of SMA (e.g. pitting corrosion points) and to visualize them with a high spatial resolution.

Furthermore, with AC-SECM joined materials (of the same and of different type) will be locally investigated with regard to their different electrochemical behaviour to make a point of their corrosion resistance and hence their operational life span.



 
 
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Get in touch with: frank.smetz@ruhr-uni-bochum.de