Is Passivation Of Stainless Steel Screws Important?

In the production process of stainless steel screws, such as upsetting and turning, the surface of the screw may be stained with iron filings or some relatively written particles generated during the processing. If it is not removed, the appearance of the screw surface will be affected or the screw will rust. Generally, this surface treatment requires passivation to remove impurities on these surfaces.

Passivating the stainless steel screw can not only make the surface of the screw smoother and brighter, but also improve the anti-rust ability and corrosion resistance of the screw. Due to different passivation treatments.

The salt spray test time is different, some can exceed 24 hours, and some can exceed 1000 hours, which requires the customer to actively inform the salt spray test how long it takes, otherwise the stainless steel screw manufacturers will basically follow the standard passivation treatment.

According to the standard passivation treatment of stainless steel screws, it can basically only pass the 12-hour salt spray test, and cannot reach a longer time. So when do passivation treatment, be sure to inform screw manufacturers of their own requirements, otherwise it will be different from their actual needs.