Anticorrosive Effect of Halogenated Aniline Enaminoesters on Carbon Steel in HCl

Table 4

Electrochemical parameters obtained by PP tests for enaminoesters in 1.0 mol L^-1 HCl medium in AISI 1020 carbon steel.

Inhibitor	(Mol L^-1)	vs. ag/AgCl (mV)	(mA cm^-2)	(mV dec^-1)	(mV dec^-1)		(%)
Blank	—	-479	0.314	71.43	101.45	—	—
F-EN	1.0 × 10^-5	-465.27	0.342	109.05	185.03	0.4013	40.2
	1.0 × 10^-4	-440.73	0.151	75.93	199.15	0.6175	63.9
	1.0 × 10^-3	-429.32	0.154	74.87	183.24	0.7393	74.5
	1.0 × 10^-2	-411.55	0.077	50.84	128.72	0.8548	84.8
Cl-EN	1.0 × 10^-5	-466.51	0,262	107.32	124.19	0.4497	45.3
	1.0 × 10^-4	-461.27	0.124	100.32	139.42	0.5017	50.4
	1.0 × 10^-3	-468.78	0.092	79.24	135.97	0,7709	76.8
	1.0 × 10^-2	-465.21	0.080	77.12	100.78	0.8436	83.8
Br-EN	1.0 × 10^-5	-462.28	0.153	100.84	157.2	0.5113	51.0
	1.0 × 10^-4	-461.52	0.132	102.04	156.86	0.5781	58.9
	1.0 × 10^-3	-467.85	0.112	104.04	144.05	0.6427	63.7
	1.0 × 10^-2	-444.45	0.0791	84.48	105.03	0.7481	75.3
H-EN	1.0 × 10^-5	-434.51	0.199	101.26	139.77	0.3939	39.4
	1.0 × 10^-4	-442.34	0.151	97.22	120.96	0.5167	51.7
	1.0 × 10^-3	-463.33	0.091	73.76	115.20	0.7104	71.0
	1.0 × 10^-2	-450.31	0.070	59.28	107.56	0.7764	78.9