Table 5 Potentiodynamic polarization parameters derived for T95 corrosion in 15 wt% HCl at different temperatures without and with 6.80 mM aspartame alone and in combination with 1 mM KI or 1 mM SDS or both.
System | \(-\) Ecorr (mV vs. Ag/AgCl) | icorr (μA cm−2) | βa (V dec−1) | \(-\) βc (V dec−1) | v (mm/y) | ηPDP % |
|---|---|---|---|---|---|---|
60 °C | ||||||
Blank | 474.0 | 2240 | 62.30 | 173.40 | 25.93 | - |
ASP | 478.0 | 1160 | 49.90 | 151.90 | 13.43 | 48 |
ASP + SDS | 478.0 | 1060 | 57.20 | 164.80 | 12.27 | 52 |
ASP + KI | 472.0 | 890 | 45.30 | 161.80 | 10.30 | 60 |
Formulation | 469.0 | 590 | 49.10 | 165.30 | 6.83 | 74 |
70 °C | ||||||
Blank | 477.0 | 5270 | 135.90 | 531.20 | 61.00 | - |
ASP | 376.0 | 2050 | 81.80 | 160.80 | 23.73 | 61 |
ASP + SDS | 465.0 | 1760 | 55.40 | 174.50 | 20.37 | 67 |
ASP + KI | 460.0 | 1720 | 66.90 | 179.20 | 19.91 | 67 |
Formulation | 453.0 | 1000 | 41.20 | 178.30 | 11.58 | 81 |
80 °C | ||||||
Blank | 460.0 | 9500 | 22.90 | 133.70 | 109.97 | - |
ASP | 459.0 | 3380 | 90.00 | 200.00 | 39.13 | 64 |
ASP + SDS | 460.0 | 4340 | 67.20 | 178.90 | 50.24 | 54 |
ASP + KI | 465.0 | 3290 | 56.90 | 176.60 | 38.08 | 65 |
Formulation | 451.0 | 1850 | 49.60 | 164.00 | 21.41 | 83 |
90 °C | ||||||
Blank | 443.0 | 16,100 | 154.00 | 209.00 | 186.37 | - |
ASP | 448.0 | 2160 | 100.00 | 210.00 | 25.00 | 87 |
ASP + SDS | 451.0 | 2010 | 88.90 | 190.90 | 23.27 | 88 |
ASP + KI | 443.0 | 1500 | 93.20 | 218.90 | 17.36 | 91 |
Formulation | 446.0 | 1240 | 91.70 | 251.80 | 14.35 | 92 |
