No! Passivization has become a buzz word as of recently and there's a lot of mis-information regarding it. Stainless steel naturally passivates with oxygen. There is no need to passivate your equipment at home. There are no professional standards that recommend Star-San (Phosphoric Acid) at room temperature to passivate stainless steel. If you do see a small surface rust spot hit it with Bar Keepers Friend and it'll be gone forever.