Table 5 Potentiodynamic polarization fitted data for bare Al, epoxy coatings, GO-epoxy coatings, GO-TTA-epoxy coatings in 3.5% NaCl solution.
Sample name | Ecorr (mV/SCE) | icorr (µA cm2) | βa (mV) | βc (mV) | Corrosion rate (mpy) | IE (%) |
|---|---|---|---|---|---|---|
Bare Al | − 879.223 | 7.064 | 97.3 | − 219.9 | 3.109 | – |
Epoxy coatings | − 969.582 | 3.187 | 295.2 | − 209.2 | 1.402 | 54.88 |
GO-epoxy coatings | − 864.991 | 1.135 | 281.5 | − 241.5 | 0.499 | 83.93 |
GO-TTA-epoxy coatings | − 921.316 | 0.178 | 122.1 | − 142.2 | 0.078 | 97.48 |
