Transient analysis through Hilbert spectra of electrochemical noise signals for the identification of localized corrosion of stainless steel
article
Hilbert spectra allow identification of instantaneous frequencies that are attributed to specific corrosion mechanisms in electrochemical noise
data. The present work proposes to identify and analyze areas of interest in Hilbert spectra, which enables to obtain valuable frequency information
from electrochemicalnoise signals. Experiments were performed on AISI304 exposed to aqueous HCl solutions at different pH values resulting in either
distinct general or localized attack. Results indicate that application of the proposed transient analysis to Hilbert spectra provides a
significantly improved determination of the frequency characteristics of the electrochemical noise signals compared to time–frequency data
analysis without transient analysis.
data. The present work proposes to identify and analyze areas of interest in Hilbert spectra, which enables to obtain valuable frequency information
from electrochemicalnoise signals. Experiments were performed on AISI304 exposed to aqueous HCl solutions at different pH values resulting in either
distinct general or localized attack. Results indicate that application of the proposed transient analysis to Hilbert spectra provides a
significantly improved determination of the frequency characteristics of the electrochemical noise signals compared to time–frequency data
analysis without transient analysis.
TNO Identifier
472088
ISSN
00134686
Source
Electrochimica Acta, 104, pp. 84-93.
Publisher
Elsevier
Collation
10 p.
Pages
84-93
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