Research Article
Copper Corrosion Inhibition in 1โM by Two Benzimidazole Derivatives
Table 2
Calculated parameters from modified Langmuir isotherm and El-Awady adsorption isotherm at = 10โ3โM.
| Inhibitor | Temperature(K) | Modified Langmuir isotherm | El-Awady isotherm | | | Slope | | | | 1/ | | (105โMโ1) | (kJยทmolโ1) | | | (105โMโ1) | (kJยทmolโ1) | | |
| MBI | 298 | 0.71 | โ31.93 | 0.968 | 0.999 | 0.63 | โ31.63 | 0.941 | 0.998 | 308 | 0.77 | โ33.19 | 0.992 | 0.999 | 0.71 | โ32.98 | 0.957 | 0.997 | 318 | 0.83 | โ34.48 | 1.005 | 0.999 | 0.85 | โ34.52 | 1.006 | 0.998 | 328 | 1.00 | โ36.06 | 1.004 | 0.999 | 0.91 | โ35.80 | 0.982 | 0.973 | | 338 | 1.01 | โ37.16 | 1.016 | 0.999 | 1.16 | โ37.58 | 1.067 | 0.996 |
| TMBI | 298 | 0.80 | โ32.18 | 1.007 | 0.999 | 0.84 | โ32.33 | 1.029 | 0.984 | 308 | 0.96 | โ33.88 | 0.977 | 0.999 | 0.90 | โ33.58 | 0.949 | 0.994 | 318 | 1.11 | โ35.23 | 0.982 | 0.999 | 1.02 | โ35.00 | 0.964 | 0.990 | 328 | 1.15 | โ36.44 | 0.998 | 0.999 | 1.19 | โ36.55 | 1.009 | 0.995 | 338 | 1.25 | โ37.49 | 1.008 | 0.999 | 2.96 | โ40.20 | 1.051 | 0.996 |
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