A Study of 1-Benzyl-3-phenyl-2-thiourea as an Effective Steel Corrosion Inhibitor in 1.0 M HCl Solution

Table 2

Polarization curve parameters of low carbon steel in 1.0 M HCl with different concentrations of BPTU and URO at 30°C.

Inhibitors	Concentration (M)	icorr (iinh) (mA.cm^−2)	βa (mV.dec^−1)	−βb (mV.dec^−1)	H (%)
BPTU	Blank	0.9000	36.4	24.8	—
	2 × 10^−4	0.0513	32.8	32.5	94.30 (1.30)
	10^–4	0.0688	32.5	35.7	92.35 (1.25)
	5 × 10^−5	0.0885	32.9	39.4	90.16 (1.30)
	10^–5	0.1067	31.3	40.1	88.15 (1.40)
URO	2 × 10^−4	0.4809	33.9	35.5	46.57 (1.15)

Values in parenthesis in the last column of this table are the mean absolute deviation.