Table 9.

Electrochemical parameters obtained from EFM technique for the corrosion of carbon steel in 1 M HCl at various concentrations of carbonitrile compounds at 25 °C.

Comp.	Conc, M	icorr. μA cm−2	βa, mV dec−1	− βc, mV dec−1	CF(2)	CF(3)	%η
1.0 M HCl, Blank		299.2 ± 0.2009	93.7 ± 0.1453	101.3 ± 0.2027	1.89	2.96	–
PdC-OH	2 × 10–5	62.8 ± 0.2235	82.5 ± 0.1732	102.1 ± 0.2906	1.17	2.70	79.0
	4 × 10–5	56.4 ± 0.2127	83.6 ± 0.2309	111.6 ± 0.1732	1.65	2.63	81.2
	6 × 10–5	52.7 ± 0.2033	72.1 ± 0.1732	89. 7 ± 0.1763	1.97	3.22	82.4
	8 × 10–5	71. 5 ± 0.1764	74.0 ± 0.2309	87.0 ± 0.2082	1.40	2.71	88.6
	1 × 10–4	67.6 ± 0.1551	85.0 ± 0.2102	107.0 ± 0.2028	1.82	2.69	89.2
PdC-Me	2 × 10–5	91.8 ± 0.1614	93.8 ± 0.1732	104.3 ± 0.2028	1.97	3.20	69.3
	4 × 10–5	89.8 ± 0.1301	92.9 ± 0.2101	103.1 ± 0.2123	1.57	3.47	70.3
	6 × 10–5	68.5 ± 0.1564	79.0 ± 0.2423	93.1 ± 0.2234	2.22	2.91	77.1
	8 × 10–5	65.1 ± 0.2603	76.1 ± 0.2512	111.2 ± 0.2131	2.04	2.59	78.3
	1 × 10–4	64.20.2028	69.3 ± 0.1202	76.2 ± 0.2028	2.08	2.47	78.5
PdC-H	2 × 10–5	92.3 ± 0.2028	108.3 ± 0.2333	133.2 ± 0.1732	2.20	2.66	69.2
	4 × 10–5	88.9 ± 0.2906	95.4 ± 0.1453	110.7 ± 0.2309	1.90	2.70	70.3
	6 × 10–5	80.0 ± 0.1732	106.1 ± 0.2027	123.1 ± 0.1453	1.95	3.48	73.3
	8 × 10–5	70.6 ± 0.2028	96.7 ± 0.20223	129.8 ± 0.2028	1.88	2.99	76.4
	1 × 10–4	70.3 ± 0.2082	86.3 ± 0.1027	99.9 ± 0.1453	2.25	3.22	76.5