Comparison table highlighting in-vitro results for both materials

In-vitro results17-4PH SSCu
Linear polarization resistance (Rp) (Ω)3.05 × 1063.47 × 104
Anodic constant (βa)0.084040.05285
Cathodic constant (βc)0.101210.19952
Equivalent weight (EW) (g/mol)27.9231.80
Density (ρ) (g/cm3)7.808.96
Exposer area (A) (cm2)1.51.8
Constant (K) (mm/year)0.003270.00327
Corrosion current (Icorr) (A)6.56 × 10–79.00 × 10–7
Corrosion rate (CR) (mm/year)5.12 × 10–85.80 × 10–8