When I think of a sacrificial anode I think in terms of a boat where the aluminum or stainless steel propellers,shafts and housings are protected by a sacrificial zinc anode that gets eaten away, In the case of the anode used in electrolylsis cleaning the anode is not actually getting sacrificed, it is being used more as a rust magnet where the Iron Oxide is being pulled off the object being cleaned and to the stainless item used as an anode. Further if stainless was such a big producer of Chromium I would think that there would be some regulations in regards to the use of stainless on boats .
