Table 2 Activation parameters of carbon steel corrosion in 1 M HCl without and with different concentrations at different temperatures.
Soln. Name | Conc. ppm | \(\:{\varvec{E}}_{\varvec{a}}^{*}\) kJ mol− 1 | R2 | \(\:\varDelta\:{\varvec{H}}^{*}\) KJ mol− 1 | \(\:\varDelta\:{\varvec{S}}^{*}\) J mol− 1K− 1 | R2 |
|---|---|---|---|---|---|---|
Blank | 0 | 32.0 | 0.95 | 30.9 | -11.50 | 0.94 |
TAC 6 | 5 | 43.6 | 0.92 | 42.5 | 68.90 | 0.92 |
10 | 45.1 | 0.91 | 44.0 | 79.40 | 0.91 | |
20 | 46.6 | 0.90 | 45.7 | 91.90 | 0.90 | |
30 | 47.0 | 0.90 | 45.5 | 89.70 | 0.90 | |
40 | 47.6 | 0.90 | 46.5 | 97.00 | 0.90 | |
50 | 48.2 | 0.90 | 47.1 | 101.0 | 0.90 | |
TAC 18 | 5 | 44.4 | 0.91 | 43.3 | 71.80 | 0.91 |
10 | 46.4 | 0.90 | 43.6 | 73.70 | 0.90 | |
20 | 46.8 | 0.91 | 45.7 | 87.60 | 0.91 | |
30 | 48.6 | 0.92 | 40.8 | 49.60 | 0.92 | |
40 | 49.1 | 0.91 | 43.1 | 46.10 | 0.91 | |
50 | 49.6 | 0.91 | 40.8 | 47.40 | 0.91 |
