What is the passivation process?
To passivate a metal item, it must be free of chemicals and debris that can interfere with the chemical process. The metal is first inspected and cleaned before being soaked in a nitric acid solution. Citric acid can also be used in place of nitric acid, but it is not as common.
The duration and temperature of the soak will vary according to the application of the item and its composition. After contaminants, minor imperfections, and rust are removed from the material, it is rinsed and allowed to dry. Note that the passivation process can also be adjusted for projects that need to be done in-house.