The Department of Material Science has several devices for different corrosion-monitoring techniques. There are three computer controlled potentiostatic study devices for polarization measuring and one device for resting potential measurements and also salt spray test equipment.
Corrosion monitoring can also be performed in temperature cabinets. In addition to the corrosion analysis there is possibility to use SEM with EDS analysis and X-ray diffraction device.
Polarization and resting potential measurements are electrochemical techniques in corrosion analysis. Corrosion rates and charge transfer properties of an electrochemical system can rapidly be predicted from impedance data and from potentiodynamic techniques. Corrosion rate depends primarily on factors relating to the electrochemical reaction, temperature, electrode material, surface area and chemical environment.
Measurements provide information about corrosion reactions. They can be monitored or driven at the surface of a desired metal sample, and a variety of characteristics related to the metal/environment pairing can be determined. Examples of characteristics of interest include open circuit or corrosion potential, instantaneous corrosion rate, passivation behaviour, pitting potential and susceptibility, and galvanic corrosion behaviour of dissimilar metal pairs. Salt spray tests are type of accelerated corrosion test.
Contact: Antti Hynnä
Computer controlled potentiostatic study devices for polarization measuring.