Electrochemical noise analysis to obtain the Rsn value via FFT using Excel



Título del documento: Electrochemical noise analysis to obtain the Rsn value via FFT using Excel
Revue: Ecletica quimica
Base de datos:
Número de sistema: 000552562
ISSN: 0100-4670
Autores: 1
2
3
2
2
Instituciones: 1São Paulo State University (Unesp), Institute of Chemistry, Engineering, Physics and Mathematics Department, Araraquara, São Paulo, Brazil,
2São Paulo State University (Unesp), Institute of Chemistry, Department of Analytical Chemistry, Physical Chemistry, and Inorganic, Araraquara, São Paulo, Brazil,
3EMBRAER,
Año:
Volumen: 45
Número: 4
Paginación: 57-70
País: Brasil
Idioma: Inglés
Resumen en inglés Electrochemical noise (EN) measurements are based on the fluctuations of the electrochemical potential and the current that occur during, for example, a corrosion process without an external signal perturbation. EN analysis (ENA) allows assessment of the type of corrosion and rapid determination of the corrosion rate. Microsoft Excel®, an inexpensive and readily available software package, is an excellent tool for performing repetitive calculations, with automation that saves time for the users. It is a useful tool for the analysis of EN data using fast Fourier transform (FFT), a process that is often made repeatedly and, if not automated, is quite laborious. This work presents a step-by-step procedure using Excel to perform these calculations, automating the process of obtaining the spectral electrochemical noise resistance, . This routine was used to analyze experimental potential and current noise data recorded for chalcopyrite. The results were comparable to those obtained for the same set of experimental data using Origin® software.
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