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

Table 3

Corrosion parameters obtained from weight loss of mild steel in 1 M H₂SO₄ containing various concentrations of BN extract at different temperatures.

Concentration of BN (mg/L)	Temperature
	30°C			40°C			50°C			60°C
	𝑊 (mg/cm^2)	IE (%)	𝜃	𝑊 (mg/cm^2)	IE (%)	𝜃	𝑊 (mg/cm^2)	IE (%)	𝜃	𝑊 (mg/cm^2)	IE (%)	𝜃
0	5.82	—	—	7.47	—	—	14.57	—	—	23.87	—	—
5	2.56	56.01	0.5601	3.96	46.99	0.4699	9.19	36.93	0.3693	16.81	29.58	0.2958
10	2.39	58.93	0.5893	3.86	48.33	0.4833	8.96	38.5	0.3850	16.48	30.96	0.3096
20	2.21	62.03	0.6203	3.7	50.47	0.5047	8.58	41.11	0.4111	16.02	32.89	0.3289
40	1.93	66.84	0.6684	3.45	53.82	0.5382	8.21	43.65	0.4365	15.35	35.69	0.3569
60	1.69	70.96	0.7096	3.19	57.3	0.5730	7.69	47.22	0.4722	14.98	37.24	0.3724
80	1.54	73.54	0.7354	2.95	60.51	0.6051	7.19	50.65	0.5065	14.24	40.34	0.4034
100	1.41	75.77	0.7577	2.75	63.19	0.6319	6.98	52.09	0.5209	13.55	43.23	0.4323