Table 2 Equivalent circuit for fitting parameters of 304 stainless steel in borate buffer solution
From: Characterization of Passive Films Formed on As-received and Sensitized AISI 304 Stainless Steel
|  | Potential E (V) | Resistance of solution Rs (Ω/cm2) | CPE Q (Ω−1sn cm−2) | Exponent of CPE (n) | Charge transfer resistance R1 (Ω/cm2) | Capacity C/F (cm−2) | Film resistance Rt (Ω/cm2) |
|---|---|---|---|---|---|---|---|
As-received | − 0.2 | 58.61 | 2.167 × 10−5 | 0.8704 | 61.07 | 3.84 × 10−6 | 3.607 × 10−6 |
0 | 51.14 | 1.248 × 10−5 | 0.8768 | 26.26 | 4.208 × 10−6 | 3.144 × 10−6 | |
0.2 | 50.59 | 1.057 × 10−5 | 0.8615 | 23.69 | 3.527 × 10−6 | 3.34 × 10−6 | |
0.4 | 49.34 | 1.289 × 10−5 | 0.8422 | 18.56 | 5.209 × 10−6 | 1.542 × 10−6 | |
0.6 | 53.74 | 1.786 × 10−5 | 0.8872 | 24.39 | 5.866 × 10−6 | 1.262 × 10−6 | |
0.8 | 49.14 | 1.835 × 10−5 | 0.8739 | 24.28 | 8.065 × 10−6 | 1.025 × 10−6 | |
Sensitized | − 0.2 | 54.11 | 2.779 × 10−5 | 0.8645 | 71.4 | 3.783 × 10−6 | 2.406 × 10−6 |
0 | 48.7 | 1.433 × 10−5 | 0.9016 | 30.97 | 4.939 × 10−6 | 2.378 × 10−6 | |
0.2 | 55.37 | 1.536 × 10−5 | 0.9346 | 9.523 | 5.536 × 10−6 | 2.104 × 10−6 | |
0.4 | 56.83 | 1.565 × 10−5 | 0.8584 | 19.46 | 4.397 × 10−6 | 1.32 × 10−6 | |
0.6 | 54.54 | 1.231 × 10−5 | 0.8742 | 22.65 | 5.223 × 10−6 | 1.136 × 10−6 | |
0.8 | 51.13 | 1.803 × 10−5 | 0.8827 | 31.27 | 6.83 × 10−6 | 1.005 × 10−6 |