Pickling Behaviour of 2205 Duplex Stainless Steel Hot-Rolled Strips in Sulfuric Acid Electrolytes

Table 3

Fitted results for EIS spectra in 300 g L⁻¹ H₂SO₄ solutions at 75°C containing different ions.

Ions	Rs, Ω cm^2	Y0-fS^α , Ω^−1 cm^−2	αf	Rf, Ω cm^2	Y0-dlS^α , Ω^−1 cm^−2	αdl	Rt, Ω cm^2
No ions	0.82	0.00218	0.87	2.80	0.0658	0.92	1.6
10 g L^−1 Fe^2+	0.94	0.00185	0.96	3.14	0.093	0.84	10
10 g L^−1 Fe^3+	1.04	0.000133	0.95	54.99	0.000281	0.68	70.6