Table 3.

Parameters of equivalent electrical circuits determined for the five tested materials.

Sample	RS [Ωcm2]	Rct [Ωcm2]	CPEelectric double layer [F/cm2]	CPEpassive film [F/cm2]
0-P	16,296	232,660	1.3204 × 10−5	0.88785
5-P	15,437	537,080	1.4201 × 10−5	0.87963
10-P	16,934	176,901	1.6782 × 10−5	0.87001
15-P	14,553	146,120	1.6131 × 10−5	0.87704
16.4-P	14,306	509,751	13987 × 10−5	0.83287