[FieryTransition]

I was wondering about this too, it's not viable to have a coating which necessitates changing equipment periodically. It will add logistical problems and waste. I think you are right in that using solid metals instead, makes more sense, given antibacterial properties have been known to exist for these for a while. The question is if all types of pathogens can be removed without damaging the equipment, or if material research could create an alloy which just like stainless steel, could make the metal form an oxidation layer which would protect it in case of contact with corrosive liquids.