Used for brightening and passivating Stainless Steel. DS-9 produces a bright specular finish on AISI 300 Series Stainless and result in a uniform surface with a nickel rich, non-reactive grain structure that resists rust. DS-9 produces a visually pleasing surface on 200 and 400 Series without the use of current. Exhibits minimal metal removal to hold tight dimensional tolerances. Can be used on Inconel and Kovar alloys.