Solanum surrattence as Potential Corrosion Inhibitor

Table 1

Inhibition efficiency, corrosion rate, and surface coverage for aluminium in 0.1 N and 0.5 N hydrochloric acid solution with given inhibitor addition for 24 h at 298 ± 1 K.

Conc. Inh. (%)	Inhibition efficiency	Corrosion rate	Surface coverage	Inhibition efficiency	Corrosion rate	Surface coverage
	(0.1 N)	(0.1 N)	(0.1 N)	(0.5 N)	(0.5 N)	(0.5 N)
Pet. Ether extract
0.12	14.02	13.27	0.1402	24.25	29.27	0.2425
0.24	19.63	12.40	0.1963	27.61	27.97	0.2761
0.36	35.51	9.95	0.3551	35.82	24.80	0.3582
0.48	40.19	9.23	0.4019	42.54	22.21	0.4254
0.60	44.86	8.51	0.4486	48.13	20.04	0.4813
Acetone extract
0.12	12.15	13.55	0.1215	19.03	31.29	0.1903
0.24	22.43	11.97	0.2243	24.63	29.13	0.2463
0.36	41.12	9.08	0.4112	30.60	26.82	0.3060
0.48	45.79	8.36	0.4579	39.18	23.50	0.3918
0.60	51.40	7.50	0.5140	53.73	17.88	0.5373
Methanol extract
0.12	10.28	13.84	0.1028	18.28	31.58	0.1828
0.24	16.82	12.83	0.1682	22.76	29.85	0.2276
0.36	23.36	11.82	0.2336	26.12	28.55	0.2612
0.48	29.91	10.81	0.2991	36.19	24.66	0.3619
0.60	42.06	8.94	0.4206	47.76	20.18	0.4776