Table 1. Corrosion Parameters of PDDB and PDHDB Obtained from Weight Loss Measurements for Carbon Steel in 1.0 mol·L^–1 HCl.

inhibitor	C/mol·L–1	v/mm·y–1	θ	η (%)
HCl	0	4.9945 ± 0.1258
PDDB	1.0 × 10–6	2.9201 ± 0.0119	0.42 ± 0.01	41.6 ± 0.2
	3.0 × 10–6	1.7116 ± 0.0501	0.66 ± 0.01	65.7 ± 1.0
	6.0 × 10–6	1.6018 ± 0.0066	0.68 ± 0.01	67.9 ± 0.2
	1.0 × 10–5	1.0839 ± 0.1095	0.78 ± 0.02	78.4 ± 2.4
	3.0 × 10–5	0.6813 ± 0.0573	0.86 ± 0.02	86.3 ± 1.2
PDHDB	1.0 × 10–6	2.5153 ± 0.0692	0.49 ± 0.01	49.4 ± 1.2
	3.0 × 10–6	1.6220 ± 0.0459	0.68 ± 0.01	67.5 ± 0.9
	6.0 × 10–6	1.3084 ± 0.1115	0.75 ± 0.01	74.5 ± 1.5
	1.0 × 10–5	0.8670 ± 0.0678	0.83 ± 0.02	82.7 ± 1.4
	3.0 × 10–5	0.5742 ± 0.0686	0.89 ± 0.02	88.5 ± 1.3