Abstract
Impedance spectra for the secondary phase particles that populate in aluminium alloy 2024-T3 are presented. Such impedance data using an electrochemical microcell have not been previously reported, and were possible via a fast Fourier transform-based technique. The interfacial characteristics of intermetallic particles in NaCl and chromate solutions were described by a simplified Randles circuit. Impedance analysis, along with anodic polarization, demonstrated that Al2CuMg (S-phase) showed the highest dissolution propensity, while the other phases studied were net cathodes. Based on the capacitance measurements determined, the dealloying of S-phase was evaluated in-situ.
| Original language | English |
|---|---|
| Pages (from-to) | 155-164 |
| Number of pages | 10 |
| Journal | Corrosion Science |
| Volume | 101 |
| DOIs | |
| State | Published - Dec 2015 |
Bibliographical note
Publisher Copyright:© 2015 Elsevier Ltd.
Keywords
- A. Intermetallics
- B. EIS
- B. Polarisation
- C. Passive films
ASJC Scopus subject areas
- General Chemistry
- General Chemical Engineering
- General Materials Science