Electrochemical Studies of Monoterpenic Thiosemicarbazones as Corrosion Inhibitor for Steel in 1 M HCl

Table 3

Kinetic parameters derived from Nyquist plots of steel immersed in 1 M HCl with different concentrations of Camphor thiosemicarbazone , Carvone thiosemicarbazone , and Pulegone thiosemicarbazone at 293 K.

Inhibitors	(mmol/L)	(Ω·cm^2)	(Ω·cm^2)	(µF/cm^2)	(µΩ^−1cm^−2  )		(%)
	Blank			172.5	247.8	0.84	---
(5)	0.1			49.5	123.6	0.78	71.32
	0.5			42.9	79.6	0.82	80.34
	1.0			42.8	90.3	0.80	80.42
	5.0			29.0	55.0	0.80	86.72
(6)	0.1			140.5	330.0	0.75	67.39
	0.5			124.3	175.8	0.75	71.17
	1.0			57.4	142.5	0.69	83.31
	5.0			89.9	178.7	0.70	86.82
(7)	0.1			146.7	341.9	0.81	24.56
	0.5			276.9	480.0	0.77	49.26
	1.0			213.2	386.6	0.72	68.74
	5.0			237.9	479.9	0.74	78.21