Corrosion Inhibition of 3003 Aluminum Alloy in Molar Hydrochloric Acid Solution by Olive Oil Mill Liquid By-Product

Table 5

Electrochemical impedance parameters of AA3003 alloy in 1 M HCl medium without and with addition of OMW inhibitor at different concentrations (at 298 K).

Conc. (ppm)
Blank		0.75	5.95	4.58	333	0.8573	1.613	—
0.5		0.74	8.78	4.64	90.8	0.9897	2.019	32.2	0.322
1.0		0.73	14.74	5.64	61.7	0.9847	4.776	59.6	0.596
2.0		0.73	19.77	6.50	94.4	0.9882	5.074	69.9	0.699
3.0		0.71	26.85	8.66	123.0	0.9787	6.822	77.8	0.778
4.0		0.72	30.72	8.27	72.6	0.9557	11.15	80.6	0.806
5.0		0.72	34.78	43.68	62.6	0.9680	14.71	82.9	0.829
6.0		0.77	54.42	61.97	84.0	0.9486	38.06	89.1	0.891