Drift removal procedures in the analysis of electrochemical noise

U. Bertocci, F. Huet, R. P. Nogueira, P. Rousseau

Research output: Contribution to journalArticlepeer-review

134 Scopus citations

Abstract

Removing direct current (DC) trends before calculating standard deviations and power spectral densities is a necessary operation, but the choice of method is probably one of the most difficult problems in electrochemical noise measurements. The procedure must be simple and straightforward and must effectively attenuate the low-frequency components without eliminating useful information or creating artifacts. Several procedures are presented, including moving average removal (MAR), linear detrending, polynomial fitting, and analog or digital high-pass filtering. Their effect on electronic and electrochemical signals is discussed. The results show that the best technique appears to be polynomial detrending. In contrast, the recently proposed MAR method was found to have considerable drawbacks and its use is not recommended.

Original languageBritish English
Pages (from-to)337-347
Number of pages11
JournalCorrosion
Volume58
Issue number4
DOIs
StatePublished - Apr 2002

Keywords

  • Corrosion monitoring
  • Current drift
  • Electrochemical noise
  • High-pass filtering
  • Moving average removal
  • Noise resistance
  • Power spectral density
  • Voltage drift

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