Table 5: Activation parameter for N80 in 15% HCl solution in the absence and the presence of the inhibitor obtained from weight loss measurements.

InhibitorConcentration (ppm) (kJ mol−1) (kJ mol−1) (Jmol−1 K−1)

Blank 85.06 84.14 40.99

20 72.93 66.09
50 66.67 64.75
AMPT 100 60.32 62.80
150 62.32 59.13
200 63.78 49.40

20 75.40 71.61
50 70.50 66.87
APT 100 70.15 65.50
150 72.25 67.63
200 69.41 66.00

20 78.53 71.73
50 72.64 68.45
ACPT 100 72.66 68.72
150 74.13 69.77
200 71.15 69.44