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

Stainless steel screw can pass the salt spray test at different times depending on the surface treatment.

Stainless steel screws if the surface has not been any surface treatment, just a simple cleaning oil, then in the salt spray test, is not over.

stainless steel screw can be tested for more than 500 hours with a passivated finish. But it’s not always 500 hours with passivation. Because passivation also has different treatments, each treatment can pass the salt spray test time is different, for example, some can only pass 48 hours, 72 hours and so on. Therefore, when ordering screws, you need to tell the manufacturer how long you need the salt spray test time.

For electrophoretic surface treatment, the salt spray test time can be more than 72 hours. So how long the stainless steel screw will last the salt spray test depends on what the surface treatment is. If you need stainless steel screws, please contact Shi Shi Tong.