Electropolishing was performed on 304SS sheets covered
with a Teflon coating with an exposed area of 1 cm × 1 cm. The
test sheets were used directly without any pretreatment. The
304SS sheet was totally immersed into the center of a cylin-
drical cell with 50 ml EP solution, which was surrounded by
an isothermally circulated water system (Haake DC3 and K20).