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

Table 7

Effect of halide ions on the mild steel corrosion in 1 M H₂SO₄ and 2 M HCl in the absence and presence of BN extract.

System	Inhibition efficiency, 𝐸 (%)
	1 M H2SO4		2 M HCl
	30°C	60°C	30°C	60°C
100 mg/L BN	76.4	42.8	93.0	66.2
0.5 mM KCl	32.7	26.2	26.4	20.9
0.5 mM KBr	52.9	45.7	52.4	40.3
0.5 mM KI	69.6	60.0	65.0	54.8
100 mg/L BN + 0.5 mM KCl	79.2	44.8	94.4	67.3
100 mg/L BN + 0.5 mM KBr	81.7	47.0	95.8	68.4
100 mg/L BN + 0.5 mM KI	89.5	54.5	97.8	69.8