How long is the normal salt spray test time for stainless steel screws?

The stainless steel screws can pass the salt spray test at different times depending on the surface treatment.

Stainless steel screw if the surface has not undergone any surface treatment, just simple cleaning and oil removal, then in the salt spray test, is not passed.

Stainless steel screws can be tested for more than 500 hours for a passivated surface treatment. But it’s not just passivation that can take up to 500 hours. Because passivation also has different treatments, each treatment can pass the salt spray test time is not the same, for example, some can only pass 48 hours, 72 hours and so on. Therefore, when ordering screws, please tell the manufacturer how long the salt spray test is required.

For electrophoretic surface treatments, the salt spray test can take more than 72 hours. So the salt spray test for how long stainless steel screws can last depends on what the surface treatment is.

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