Fig. 5: Impedance spectra of corroded AA2024 under different ageing tempers. | npj Materials Degradation

Fig. 5: Impedance spectra of corroded AA2024 under different ageing tempers.

From: Corrosion of aluminium alloy AA2024-Τ3 specimens subjected to different artificial ageing heat treatments

Fig. 5

Electrochemical impedance spectroscopy results of AA2024-T3 specimens measured in 3.5 wt. % NaCl solution are provided in the form of Bode figures for the as-received condition in (a), for 2 h @ 190 °C (UA) in (b), for 8 h @ 190 °C (PA) in (c) and for 63 h @ 190 °C (OA) in (d). The left figure presents the phase angle as a function of frequency and the right figure presents the impedance modulus as a function of frequency. The different coloured curves represent the various exposure times to the electrolyte after which each measurement was performed.

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