Passivation is a way to protect cnc steel parts against rust. As one professional CNC machining manufacturer, every day, FM always machined many different geometry shapes and sizes of metal parts based on different materials. Such as: Aluminum, Stainless steel, Titanium and other some metal alloys etc.
When we machined one part, whether it will mean the part finished. For better maintenance of the parts after production, if you have further considered how to prevent rust or corrosion issues of the parts before production and packaging.