Synergistic Inhibition of Mild Steel Corrosion in Seawater and Acidic Medium by Cathodic Protection and Monodora myristica Using Zinc Anode

Table 3

pH values for cathodic protection and different volumes of oil extract for steel with zinc in seawater.

Days	Control	1 mL	5 mL	10 mL	15 mL
0	7.51	7.56	6.96	6.70	6.52
3	7.60	6.95	6.85	6.72	6.65
6	7.57	7.05	6.85	6.28	6.11
9	7.75	7.37	7.08	6.64	6.26
12	7.31	7.26	6.95	6.84	6.40
15	7.45	7.20	7.05	6.92	6.75
18	7.59	7.31	7.17	6.78	6.64
21	7.40	6.80	6.65	6.52	6.45