期刊
CORROSION SCIENCE
卷 101, 期 -, 页码 155-164出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2015.09.012
关键词
Intermetallics; EIS; Polarisation; Passive films
资金
- U.S. Air Force Academy [FA7000-12-2-0015]
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. (C) 2015 Elsevier Ltd. All rights reserved.
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