The influence of vibration and probe movement on SVET measurements

authors	Bastos, AC; Quevedo, MC; Ferreira, MGS
nationality	International
journal	CORROSION SCIENCE
author keywords	SVET; Scanning vibrating electrode technique
keywords	ELECTRODE TECHNIQUE; PITTING CORROSION; ALUMINUM-ALLOY; DISTRIBUTIONS; STEELS
abstract	communication describes a set of experiments performed to evaluate the influence of SVET vibration and movement of the probe on the obtained results. Both vibration and movement during scanning stir the solution with the risk of enhancing the oxygen transport to the surface thus increasing the measured currents and accelerating the corrosion process. It is shown that, for the SVET system used, due to its small probe, the effect of the vibration is negligible in normal operation. On the contrary, the movement of the probe during scanning increases the cathodic reaction and smaller excursions or slower movements just marginally reduce this effect. It is also shown that only the region of the sample under the probe is affect and for just brief instants. The overall corrosion in the long run is not influenced and the measured maps only scarcely show any evidences of artifacts introduced by the probe movement. (C) 2014 Elsevier Ltd. All rights reserved.
publisher	PERGAMON-ELSEVIER SCIENCE LTD
issn	0010-938X
year published	2015
volume	92
beginning page	309
ending page	314
digital object identifier (doi)	10.1016/j.corsci.2014.10.038
web of science category	Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering
subject category	Materials Science; Metallurgy & Metallurgical Engineering
unique article identifier	WOS:000349737400033