Table 11 Data from PP test for corrosion of C-Steel in 1 M HCl at 50 Ppm of the inhibitors in the presence of different concentrations of all salt at 303 K.
Salt name | Inhibitors name | Conc. ppm | \(I_{{corr}} \;\mu A~Cm^{{ - 2}}\) | \(- ~E_{{corr}} \;mV\) | \(\:{\varvec{\beta\:}}_{\varvec{a}}\) \(\:\varvec{m}\mathbf{V}/\varvec{d}\varvec{e}\varvec{c}\) | \(\:{\varvec{\beta\:}}_{\varvec{c}\:}\) \(\:\varvec{m}\varvec{V}/\varvec{d}\varvec{e}\varvec{c}\) | \(\:IE\:\%\) | \(\:\varvec{\theta\:}\) |
|---|---|---|---|---|---|---|---|---|
CoCl2 | TAC 6 | 0 | 90.00 | 437 | 112.9 | 137.4 | 68.50 | 0.685 |
10 | 46.29 | 405 | 86.6 | 170.8 | 88.10 | 0.881 | ||
30 | 39.23 | 409 | 92.1 | 179.7 | 89.92 | 0.899 | ||
50 | 27.05 | 400 | 75.6 | 151.2 | 93.05 | 0.930 | ||
70 | 24.78 | 369 | 72.8 | 167.9 | 93.63 | 0.936 | ||
90 | 22.52 | 420 | 71.2 | 165.4 | 94.21 | 0.942 | ||
TAC 18 | 0 | 35.00 | 438 | 102.8 | 132.7 | 87.80 | 0.878 | |
10 | 24.06 | 423 | 79.2 | 150.3 | 93.81 | 0.938 | ||
30 | 23.07 | 445 | 79.6 | 157.8 | 94.07 | 0.941 | ||
50 | 21.70 | 469 | 79.7 | 165.3 | 94.42 | 0.944 | ||
70 | 19.64 | 510 | 85.2 | 180.3 | 94.95 | 0.950 | ||
90 | 16.71 | 382 | 75.1 | 175.2 | 95.70 | 0.957 | ||
MnCl2 | TAC 6 | 0 | 90.00 | 437 | 112.9 | 137.4 | 68.50 | 0.685 |
10 | 25.31 | 419 | 70.00 | 202.1 | 93.49 | 0.935 | ||
30 | 23.98 | 379 | 60.00 | 181.9 | 93.84 | 0.938 | ||
50 | 21.30 | 407 | 60.00 | 171.8 | 94.52 | 0.945 | ||
70 | 20.53 | 357 | 50.00 | 161.7 | 94.72 | 0.947 | ||
90 | 19.42 | 336 | 60.00 | 163.7 | 95.01 | 0.950 | ||
TAC 18 | 0 | 35.00 | 438 | 102.8 | 132.7 | 87.80 | 0.878 | |
10 | 15.94 | 434 | 74.20 | 131.0 | 95.90 | 0.959 | ||
30 | 15.83 | 391 | 66.80 | 117.9 | 95.93 | 0.959 | ||
50 | 13.70 | 396 | 63.80 | 97.70 | 96.48 | 0.965 | ||
70 | 11.32 | 372 | 63.10 | 111.4 | 97.09 | 0.971 | ||
90 | 9.75 | 348 | 59.40 | 104.8 | 97.49 | 0.975 | ||
CuCl2 | TAC 6 | 0 | 90.00 | 437 | 112.9 | 137.4 | 68.50 | 0.685 |
10 | 34.04 | 412 | 112.2 | 188.9 | 91.25 | 0.913 | ||
30 | 23.82 | 418 | 106.6 | 179.4 | 93.88 | 0.939 | ||
50 | 18.41 | 417 | 109.7 | 161.4 | 95.27 | 0.953 | ||
70 | 15.52 | 419 | 96.50 | 162.4 | 96.01 | 0.96 | ||
90 | 13.56 | 425 | 92.00 | 154.9 | 96.51 | 0.965 | ||
TAC 18 | 0 | 35.00 | 438 | 102.8 | 132.7 | 87.80 | 0.878 | |
10 | 13.52 | 418 | 73.30 | 129.1 | 96.53 | 0.965 | ||
30 | 11.66 | 377 | 66.00 | 116.2 | 97.00 | 0.970 | ||
50 | 10.54 | 400 | 60.10 | 115.9 | 97.29 | 0.973 | ||
70 | 9.620 | 357 | 62.30 | 109.7 | 97.53 | 0.975 | ||
90 | 8.310 | 335 | 58.70 | 103.4 | 97.86 | 0.979 |
