Title :
Detection of electrode asymmetry in electrochemical noise analysis
Author :
Lowe, A. ; Eren, H. ; Fung, Chun Che
Author_Institution :
Sch. of Electr. & Comput. Eng., Curtin Univ. of Technol., Bentley, WA, Australia
Abstract :
The electrochemical noise resistance is a calculation that can be used for estimating the rate of corrosion of a pair of metal samples purely from the electrochemical noise that they generate. Ideally these metal samples (electrodes) would be identical, but it is not uncommon, for various reasons, for the electrodes to be significantly different. In that case, the theory linking the noise resistance to the more conventional electrochemical parameter, the polarisation resistance, breaks down. This link is important because it is only via the polarisation resistance that noise resistance can be used for corrosion rate estimation. It is therefore important to be able to detect an asymmetric electrode pair. This paper describes how the cross correlation between voltage and current noise can be used to detect an asymmetry
Keywords :
correlation methods; corrosion; electric resistance; electrochemical analysis; electrochemical electrodes; electrochemistry; random noise; asymmetric electrode pair; correlation coefficient; corrosion rate estimation; current noise; electrochemical noise analysis; electrochemical noise resistance; electrode asymmetry detection; polarisation resistance; voltage noise; Australia; Circuit noise; Corrosion; Current measurement; Electrical resistance measurement; Electrodes; Equations; Joining processes; Noise generators; Polarization;
Conference_Titel :
TENCON 2001. Proceedings of IEEE Region 10 International Conference on Electrical and Electronic Technology
Print_ISBN :
0-7803-7101-1
DOI :
10.1109/TENCON.2001.949603
