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

Table 5

Electrochemical parameters obtained from the Tafel plots for cathodic protection and different volumes (ml) of oil extract of Monodora myristica for steel with zinc in 0.1M sulphuric acid.

Extracts Vol (ml)	OCP (V)	Obs (V)	Bc (V/dec)	(V/dec)	icorr (A/cm^2 10^-5)	Polarization Resistance ()	I.E ()
Control	-0.532	-0.540	0.004	0.005	1.7982E-05	52.847	-
1	-0.488	-0.484	0.003	0.002	5.4309E-07	849.87	96.97
5	-0.516	-0.509	0.003	0.002	1.7283E-07	2722.8	99
10	-0.494	-0.482	0.001	0.003	1.4303E-08	27040	99.99
15	-0.344	-0.392	0.005	0.009	1.0058E-10	1.3271E+07	99.99