This paper investigates the possibility of using electrochemical voltage noise analysis to study the corrosion behaviorof a few composite materials obtained by reinforcing an aluminum matrix with either SiC particles (SiCp) or Al2O3 particles(Al2O3p) or Al2O3 fibers (Saffil, Al2O3f). The ranking of the corrosion resistances exhibited by the various materials,according to the noise analysis technique, appears to agree with the results obtained by linear polarization resistance andweight loss measurements and with the observation of the specimen surfaces by scanning electron microscopy. The recordingof both polarization curves and galvanic current densities flowing between reinforced and nonreinforced aluminumelectrodes shows that the driving force for the corrosion process is the cathodic process of oxygen reduction, which can beaffected by the nature and the shape of the reinforcement.

Application of electrochemical noise analysis to study the corrosion behaviour of aluminum composites

MONTICELLI, Cecilia;ZUCCHI, Fabrizio;BRUNORO, Giancarlo;FRIGNANI, Alessandro;TRABANELLI, Giordano
1995

Abstract

This paper investigates the possibility of using electrochemical voltage noise analysis to study the corrosion behaviorof a few composite materials obtained by reinforcing an aluminum matrix with either SiC particles (SiCp) or Al2O3 particles(Al2O3p) or Al2O3 fibers (Saffil, Al2O3f). The ranking of the corrosion resistances exhibited by the various materials,according to the noise analysis technique, appears to agree with the results obtained by linear polarization resistance andweight loss measurements and with the observation of the specimen surfaces by scanning electron microscopy. The recordingof both polarization curves and galvanic current densities flowing between reinforced and nonreinforced aluminumelectrodes shows that the driving force for the corrosion process is the cathodic process of oxygen reduction, which can beaffected by the nature and the shape of the reinforcement.
Monticelli, Cecilia; Zucchi, Fabrizio; F., Bonollo; Brunoro, Giancarlo; Frignani, Alessandro; Trabanelli, Giordano
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/1205400
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 29
  • ???jsp.display-item.citation.isi??? 24
social impact