The electrochemical variables premeditated through the Tafel polarization method for the corrosion protection of N80 steel in the 3.5% NaCl medium without and with changed doses of the synthesized hydrazides at 25 ± 1 °C.

Comp	Conc, M	−Ecorr, mV	i corr, μA cm−2	β a, mV dec−1	β c, mV dec−1	C.R. mmy−1	θ	η%
Blank	0.00	915	113.0 ± 5.65	1512	152	51.46	—	—
H2HEH	1 × 10−6	906	33.1 ± 2.31	999	142	15.12	0.707	70.7
	5 × 10−6	954	30.4 ± 3.04	1026	139	13.87	0.731	73.1
	1 × 10−5	958	21.0 ± 1.95	1042	138	9.61	0.814	81.4
	5 × 10−5	931	15.4 ± 1.50	844	142	7.04	0.864	86.4
	1 × 10−4	902	8.8 ± 0.08	613	150	4.02	0.922	92.2
H2MEH	1 × 10−6	933	30.1 ± 2.65	1025	135	13.74	0.734	73.4
	5 × 10−6	939	27.0 ± 2.70	883	133	12.32	0.761	76.1
	1 × 10−5	962	18.4 ± 1.20	956	127	8.39	0.837	83.7
	5 × 10−5	928	14.0 ± 0.96	757	144	6.41	0.876	87.6
	1 × 10−4	911	7.6 ± 0.07	524	182	3.45	0.933	93.3