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Table 3
Corrosion outcome for parent materials and friction stir welded joints.
| Samples | Corrosion potential (mV) | % IE | Open circuit potential (v) | Polarization resistance (Ω) | Corrosion rate (mm/yr) | Cathodic Tafel slope (mV/dec) | Corrosion current (μA/cm2) | Anodic Tafel Slope (mV/dec) | Chi-Sq. value (χ2) |
|---|---|---|---|---|---|---|---|---|---|
| AA7075 | −1328 | − | −0.969 | 49.52 | 4.529 | 53.61 | 402 | 156.65 | 2.79 E-06 |
| AA1200 | −1424 | 53.48 | −1.032 | 69.16 | 1.624 | 238.24 | 187 | 96.64 | 6273300 |
| TT11 | −1450.2 | 76.07 | −0.995 | 478.28 | 0.676 | 183.77 | 96.2 | 114.3 | 54365 |
| TT12 | −1325.1 | 67.16 | −0.984 | 223.9 | 0.783 | 87.53 | 132 | 59.14 | 4.92 E-07 |
| TT15 | −1282.3 | 80.12 | −0.976 | 403.14 | 0.698 | 45.37 | 79.9 | 88.29 | 3.13E-07 |
| TTT11 | −1321.6 | 78.06 | −1.056 | 956.17 | 0.464 | 53.45 | 88.2 | 23.18 | 1.84 E-08 |
| TTT12 | −1293.4 | 82.73 | −1.043 | 798.78 | 0.574 | 23.05 | 69.4 | 98.61 | 4.97 E-07 |
| TTT15 | −1282.5 | 87.96 | −0.99884 | 895.75 | 0.497 | 36.51 | 48.4 | 36.52 | 5.42 E-05 |
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