MIL STD 753 Corrosion Resistant Steel Parts - Sampling for Surface Passivation - Inspection and Testing

EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of MIL STD 753 testing. This standard describes general and detailed methods for sampling and testing for surface passivity of corrosion resistant steel parts. These tests can also be useful to determine if passivation is needed.

It contains recommendations and precautions for descaling, cleaning and passivation of stainless steel parts. It includes various alternative tests along with acceptance criteria to confirm the effectiveness of such processes for stainless steel parts.

Various alternative chemical processes have been described for the passivation of stainless steel parts. provides some non-mandatory information and provides some general guidelines for selecting the appropriate passivation treatment for certain stainless steel grades.

In short, coatings that will prevent the contact of the metal with external effects against corrosion on the surface are actually a kind of surface passivation. Not only the metal itself, but even the phosphated metal surface must be passivated. Because the corrosion, which will start in a tiny open spot that will remain on the surface during phosphating, will progress towards the inner parts of the metal and shorten its economic life. Thanks to passivation, a chemical layer is obtained that will protect the surface against external effects, either before or after phosphating.

EUROLAB assists manufacturers with MIL STD 753 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.