[Retracted] Inhibition Effect of Substituted Thiadiazoles on Corrosion Activity of N80 Steel in HCl Solution

Table 5

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

Inhibitor	Concentration (ppm)	𝐸𝑎 (kJ mol^−1)	Δ𝐻^∗ (kJ mol^−1)	Δ𝑆^∗ (Jmol^−1 K^−1)
Blank	—	85.06	84.14	40.99
	20	72.93	66.09	−26.78
	50	66.67	64.75	−32.29
AMPT	100	60.32	62.80	−40.62
	150	62.32	59.13	−54.68
	200	63.78	49.40	−88.48
	20	75.40	71.61	−8.63
	50	70.50	66.87	−24.38
APT	100	70.15	65.50	−30.71
	150	72.25	67.63	−25.73
	200	69.41	66.00	−32.34
	20	78.53	71.73	−6.60
	50	72.64	68.45	−18.37
ACPT	100	72.66	68.72	−19.13
	150	74.13	69.77	−17.30
	200	71.15	69.44	−20.50