% H2SO4 Rp
(Kohms)
Rs
(Kohms)
Cdl
(µF)
Z
(Kohms)
L
(nm)

2
14.71
.2
3.36
. 26
41.4
37.13
24.15
26.93
.56
.63
4 .11 . 12 62.18 16.1

.375

6 .14 . 11 53. 9 18.83

.44

8
1
.11
. 885
. 3
. 63
59.13
5 .4
16.91
19.84
.395
.463
Tabel 2: The Electrochemical Parameters and the Oxide Film thickness of Al-Mg alloy in the annealed Condition in Different H2SO4 Concentrations.