An Investigation of a Combined Thiourea and Hexamethylenetetramine as Inhibitors for Corrosion of N80 in 15% HCl Solution: Electrochemical Experiments and Quantum Chemical Calculation

Table 2

Corrosion kinetics parameters of N80 in 15% HCl solution with different corrosion inhibitor.

Sample (M)	(mV)	(mV)	(V)	(A·cm^−2)	(%)
15% HCl	118.37	146.65	−0.519	6.467	—
0.1 M TU	95.52	124.73	−0.519	0.351	94.57
4.0 × 10^−3 M HMTA	110.89	131.9	−0.503	0.322	95.02
15% + 4.0 × 10^−5 M TU + 0.001 M HMTA	81.04	103.49	−0.559	0.637	90.14
15% + 4.0 × 10^−4 M TU + 0.01 M HMTA	77.38	111.06	−0.548	0.419	93.52
15% + 4.0 × 10^−3 M TU + 0.1 M HMTA	82.62	88.85	−0.584	0.287	95.56