Table 2. Impedance Parameters Derived from Plots for Copper in Acid Rain Soultion and with the Addition of 1 × 10^–3 mol/dm³ 5Cl-BTA.

inhibitor, mol/dm3	Rs, Ω cm2	Rf, Ω cm2	Rct, Ω cm2	W, Ω–1 cm–2 s0.5	Cf, μF cm–2	n1	Cdl, μF cm–2	n2	IE, %
	167.2	400.6	500.4	32	7.30 × 10–7	0.7279	3.82 × 10–6	0.665
1 × 10–3	176	8923	129.1	1660	5.16 × 10–8	0.857	1.08 × 10–6	0.71	90.05