Correlations between acoustic and electrochemical measurements for metallic corrosion on steel strings used in guitars

The corrosion state of steel guitar strings and their morphology were evaluated according to exposure time to artificial human sweat solution. The instantaneous corrosion rate was evaluated using polarization resistance. Electrochemical impedance spectroscopy was used to measure the strings' st...

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Bibliographic Details
Published in:Engineering failure analysis 2015-11, Vol.57, p.270-281
Main Authors: López, José Luis, Bonastre, José, Segura, Jorge Gabriel, Gadea, José María, Juliá, Ernesto, Cases, Francisco
Format: Article
Language:English
Subjects:
Acoustic emission
Correlation analysis
Corrosion
Corrosion tests
EIS
Guitars
Human
Polarization
Steel corrosion
Steels
String
Strings
Sweat
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Summary:The corrosion state of steel guitar strings and their morphology were evaluated according to exposure time to artificial human sweat solution. The instantaneous corrosion rate was evaluated using polarization resistance. Electrochemical impedance spectroscopy was used to measure the strings' state due to corrosion in artificial human sweat solution. Modification of vibroacoustic parameters was analyzed: changes in harmonic content of sound were studied by means of the Fast Fourier Transform and spectrograms. The correlation between corrosion and acoustic measurements was established in the successive stages of corrosion. Thus, the strings' acoustic properties could be modified by means of controlled corrosion processes. •The corrosion state of steel guitar strings was evaluated in artificial human sweat.•Electrochemical methods were applied to evaluate changes in acoustic properties.•Rp may control the sound characteristics during corrosion processes.•Acoustic properties could be modified by means of controlled corrosion processes.•An appropriate correlation was obtained between Rp and sound amplitude measurements.
ISSN:1350-6307
1873-1961
DOI:10.1016/j.engfailanal.2015.07.014