Acid medium	Extract concentration (%v/v)	E_corr (Mv/SCE)	I_corr (µA∙cm⁻²)	b_c (mV∙dec⁻¹)	b_a (mV∙dec⁻¹)	%IE
H₂SO₄	2 M H₂SO₄	−0.1368	3.25 × 10⁻⁰⁶	−1.3363	0.1252	-
	3.2	−0.1170	1.84 × 10⁻⁰⁶	−1.1848	0.1106	43.3
	6.3	−0.1183	9.74 × 10⁻⁰⁷	0.2715	0.0855	70.1
	9.1	−0.1161	8.64 × 10⁻⁰⁷	0.2811	0.0881	73.4
	11.8	−0.1158	9.00 × 10⁻⁰⁷	0.2359	0.0809	72.3
	14.3	−0.1161	7.35 × 10⁻⁰⁷	0.0679	0.2340	77.4
HNO₃	1 M HNO₃	0.0745	2.38 × 10⁻⁰⁶	0.3903	0.22058	-
	3.2	0.0831	8.38 × 10⁻⁰⁷	0.1948	0.21413	64.8
	6.3	0.0746	7.69 × 10⁻⁰⁷	0.1965	0.20044	67.7
	9.1	0.1124	7.30 × 10⁻⁰⁷	0.1508	0.17174	69.4
	11.8	0.1156	7.09 × 10⁻⁰⁷	0.1201	0.11627	70.3
	14.3	0.1393	7.27 × 10⁻⁰⁷	0.1353	0.16888	69.5