Table 7.

Electrochemical parameters from polarization measurements for carbon steel corrosion in 1 M HCl for PdC-OH, PdC-Me and PdC-H derivatives at 25 °C.

Conc, M		icorr. mA cm−2	− Ecorr, mV vs.SCE	βa, mV dec−1	− βc, mV dec−1	C.R (mm y−1)	θ	%η
Blank		150.0	493 ± 0.2333	71.0 ± 0.2309	122.2 ± 0.2028	98.1	–	–
PdC-OH	2 × 10–5	35.0 ± 0.1155	448 ± 0.2028	92.9 ± 0.2309	139.8 ± 0.3528	14.5	0.767	76.7
	4 × 10–5	32.3 ± 0.1732	433 ± 0.1453	81.3 ± 0.1453	133.7 ± 0.2028	13.4	0.785	78.5
	6 × 10–5	31.6 ± 0.2603	430 ± 0.1453	79.7 ± 0.1732	134.7 ± 0.1453	13.1	0.789	78.9
	8 × 10–5	30.6 ± 0.1764	398 ± 0.1732	65.8 ± 0.2309	151.1 ± 0.2906	12.7	0.796	79.6
	1 × 10–4	29.2 ± 0.1732	414 ± 0.1732	71.4 ± 0.2028	143.0 ± 0.2028	12.1	0.805	80.5
PdC-Me	2 × 10–5	40.4 ± 0.2028	424 ± 0.1453	81.5 ± 0.1732	151.4 ± 0.1763	16.7	0.731	73.1
	4 × 10–5	38.2 ± 0.1732	433 ± 0.2082	85.0 ± 0.2309	150.9 ± 0.1732	15.8	0.745	74.5
	6 × 10–5	33.7 ± 0.2028	392 ± 0.1732	72.8 ± 0.1202	160.0 ± 0.1155	13.9	0.775	77.5
	8 × 10–5	33.4 ± 0.2309	442 ± 0.1522	87.0 ± 0.2333	145.4 ± 0.2028	13.8	0.777	77.7
	1 × 10–4	32.3 ± 0.1732	403 ± 0.1652	72.4 ± 0.1453	154.6 ± 0.1764	13.4	0.785	78.5
PdC-H	2 × 10–5	42.2 ± 0.1453	429 ± 0.1302	82.6 ± 0.2603	148.3 ± 0.2028	17.5	0.719	71.9
	4 × 10–5	40.0 ± 0.2603	420 ± 0.1135	80.7 ± 0.1732	152.0 ± 0.1265	16.6	0.733	73.3
	6 × 10–5	36.4 ± 0.2524	439 ± 0.2082	83.0 ± 0.1732	141.8 ± 0.1557	15.1	0.757	75.7
	8 × 10–5	34.5 ± 0.1453	452 ± 0.2309	86.60.1453	137.5 ± 0.1058	14.3	0.770	77.0
	1 × 10–4	33.5 ± 0.1202	391 ± 0.1453	74.5 ± 0.2082	153.3 ± 0.1741	13.9	0.778	77.8