Table 1.

Experimental parameters [14].

Parameter	Value
Voltage	250 V, 300 V, 350 V
Electrolyte	Ammonium sulfate
Electrolyte concentration (wt %)	5%
Electrolyte temperature	70 °C, 80 °C, 90 °C
Samples material	Stainless steel (1.4021)
Initial roughness ($Ra$)	0.63 µm, 0.32 µm