Interesting Behavior of Pachycormus discolor Leaves Ethanol Extract as a Corrosion Inhibitor of Carbon Steel in 1 M HCl: A Preliminary Study

Table 1

Corrosion rates as a function of immersion time with and without Pachycormus discolor ethanol extract.

Inhibitor concentration % (v/v)	Immersion time (hr)
	Corrosion rates (mg·cm^−2·hr^−1)
	1.5	4.5	6.5	21	48	109
Blank	0.78	0.51	0.57	0.57	0.48	0.57
1.0	0.47	0.17	0.14	0.08	0.06	0.05
2.0	0.18	0.12	0.09	0.04	0.03	0.03