PSI - Issue 37
Dimitris Georgoulis et al. / Procedia Structural Integrity 37 (2022) 941–947 Georgoulis et al. / Structural Integrity Procedia 00 (2021) 000 – 000
944
4
120000
50000
5 min 1 h 3 h 6 h
AA2198-T3 Exposure to 3.5 wt % NaCl solution
5 min 1 h 3 h 6 h
AA2198-T8 Exposure to 3.5 wt % NaCl solution
100000
40000
12 h 24 h 48 h
12 h 24 h 48 h
-Z'' [ Ω * cm 2 ]
80000
-Z'' [ Ω * cm 2 ]
30000
60000
20000
40000
10000
20000
0
0
0
20000 40000 60000 80000 100000 120000
0
10000 20000 30000 40000 50000
(a)
(b)
Z' [ Ω * cm 2 ]
Z' [ Ω * cm 2 ]
10 6
10 6
5 min 1 h 3 h 6 h
5min 1h 3h 6h
AA2198-T3 Exposure to 3.5 wt % NaCl solution
AA2198-T8 Exposure to 3.5 wt % NaCl solution
10 3 Impedance modulus [ Ω * cm 2 ] 10 4 10 5
10 5
10 2 Impedance modulus [ Ω * cm 2 ] 10 3 10 4
12 h 24 h 48 h
12h 24h 48h
10 2
10 1
10 1
10 -1
10 0
10 1
10 2
10 3
10 4
10 5
10 -2
10 -1
10 0
10 1
10 2
10 3
10 4
10 5
(c)
(d)
Frequency [Hz]
Frequency [Hz]
0 10 20 30 40 50 60 70 80 90
0 10 20 30 40 50 60 70 80 90
5min 1h 3h 6h
AA2198-T3 Exposure to 3.5 wt % NaCl solution
AA2198-T8 Exposure to 3.5 wt % NaCl solution
12h 24h 48h
5 min
-Theta [deg.]
1 h
-Theta [deg.]
3 h 6 h
12 h 24 h 48 h
10 -2
10 -1
10 0
10 1
10 2
10 3
10 4
10 5
10 6
10 -2
10 -1
10 0
10 1
10 2
10 3
10 4
10 5
10 6
(e)
(f)
Frequency [Hz]
Frequency [Hz]
Fig. 1. Impedance spectra of (a, c, e,) AA2198-T3 and (b, d, f) AA2198-T8 in 3.5% wt. NaCl solution.
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