Baphia nitida Leaves Extract as a Green Corrosion Inhibitor for the Corrosion of Mild Steel in Acidic Media

Table 2

Degree of surface coverage and inhibition efficiencies of different concentrations of BN extract during mild steel corrosion in 1 M H₂SO₄ and 2 M HCl obtained from gasometric method.

Concentration (mg/L)	Surface coverage, 𝜃		Inhibition efficiency, IE (%)
	30°C	60°C	30°C	60°C
1 M H2SO4
Blank	—	—	—	—
20	0.62	0.33	61.7	33.1
100	0.76	0.43	76.4	42.8
2 M HCl
Blank	—	—	—	—
20	0.80	0.57	79.9	56.7
100	0.93	0.66	93.0	66.2