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

Table 7

Electrochemical impedance parameters and percentage inhibition efficiency for N80 steel in 15% HCl in the absence and the presence of the inhibitors at different concentrations at 303 K.

Inhibitor	Concentration (ppm)	𝑅ct (Ω cm^2)	𝐶dl (𝜇F cm^2)	% IE
Blank	—	25	252
	20	74	158	66.32
	50	85	122	70.58
AMPT	100	110	87	77.25
	150	142	73	82.37
	200	178	67	85.97
	20	66	82	62.42
	50	75	66	67.71
APT	100	102	53	75.47
	150	126	32	80.13
	200	150	26	83.31
	20	63	71	60.52
	50	74	58	66.12
ACPT	100	80	41	68.58
	150	107	24	76.53
	200	134	20	81.03