The effect of concentration of H1, H2 and H3 on the (E_corr.), (I_corr.), (βa & β_c), (C.R.), (θ) and (% IE) for the corrosion of C-steel 1 M HCl at 25 °C.

Comp.	Conc.	I corr., μA cm−2	−Ecorr., mV (vs. SCE)	β a mV dec−1	−βc mV dec−1	C.R, mpy	θ	% IE
	Blank	216 ± 2.6457	413 ± 2.3094	101.6 ± 2.0275	155.7 ± 2.3184	98.77 ± 2.333
H1	1 × 10−6	140 ± 2.3333	425 ± 2.6034	100.6 ± 1.7320	163.2 ± 2.3094	64.10 ± 2.603	0.35	35.19
	2 × 10−6	104 ± 2.6039	425 ± 1.7320	99.4 ± 2.3094	160.4 ± 1.7320	47.40 ± 1.452	0.52	51.85
	5 × 10−6	53.4 ± 2.30947	406 ± 2.4037	79.2 ± 1.4529	157.4 ± 2.3092	24.42 ± 1.732	0.75	75.28
	10 × 10−6	46.2 ± 2.3333	409 ± 2.3333	76.3 ± 2.0275	149.8 ± 2.0270	16.49 ± 2.645	0.79	78.61
	15 × 10−6	36.1 ± 2.3094	408 ± 2.0275	83.5 ± 2.6034	157.3 ± 1.7638	21.13 ± 2.027	0.83	83.29
	20 × 10−6	24.7 ± 2.9059	400 ± 1.1547	80.1 ± 1.7638	146.9 ± 2.3333	11.29 ± 2.309	0.89	88.56
H2	1 × 10−6	112 ± 2.3094	428 ± 2.0816	99.6 ± 2.3094	157.1 ± 2.3094	51.22 ± 1.154	0.48	48.15
	2 × 10−6	105 ± 2.027	424 ± 1.7320	89.4 ± 2.0275	152.4 ± 2.0245	42.02 ± 1.763	0.51	51.39
	5 × 10−6	92 ± 2.6034	418 ± 2.3211	86.9 ± 2.3221	156.8 ± 2.0277	47.97 ± 1.754	0.57	57.41
	10 × 10−6	62.6 ± 2.333	424 ± 2.6034	91.1 ± 2.333	156.1 ± 2.4037	27.75 ± 1.73	0.71	71.02
	15 × 10−6	60.7 ± 1.7411	415 ± 2.3094	92 ± 2.6034	151.7 ± 2.0275	28.62 ± 2.081	0.72	71.90
	20 × 10−6	42.3 ± 1.7320	405 ± 2.6171	84.3 ± 2.354	149.1 ± 1.7322	19.32 ± 2.603	0.80	80.42
H3	1 × 10−6	152 ± 1.763	406 ± 1.763	91.8 ± 1.732	162.5 ± 1.765	69.29 ± 2.309	0.30	29.63
	2 × 10−6	115 ± 2.027	405 ± 2.603	77.1 ± 1.452	144.9 ± 2.027	52.42 ± 2.309	0.47	46.76
	5 × 10−6	44.1 ± 2.309	406 ± 1.452	70.1 ± 2.024	146.3 ± 1.763	20.16 ± 2.333	0.80	79.58
	10 × 10−6	43.7 ± 2.403	409 ± 2.027	73.4 ± 2.021	145.9 ± 2.021	15.39 ± 2.027	0.80	79.77
	15 × 10−6	33.7 ± 2.645	408 ± 2.905	79.9 ± 2.028	155.9 ± 1.201	19.95 ± 2.333	0.84	84.40
	20 × 10−6	26.1 ± 2.024	400 ± 2.333	81.8 ± 2.309	151.2 ± 1.732	11.95 ± 1.732	0.88	87.92