The Saunders® passivation diaphragm is designed for use during passivation of stainless steel systems in life science applications. Each passivation diaphragm is equipped with a high visibility, bright yellow tag that extends outside the valve assembly, indicating that the installed diaphragm is for passivation use only. This cautionary feature reminds end-users of the diaphragm’s sole purpose, thus reducing the risk that it will be left in the system after exposure to passivation chemicals and preventing possible contamination from detritus or anodic components becoming embedded in the diaphragm face.