Why does the stainless steel screw rust after a while?

Stainless screws will rust when used. What causes stainless screws to rust?

• In a humid environment, the protective film of the stainless steel screw is corroded by the electrochemical reaction caused by the adhesion of dust or foreign metal particles and the condensed water of the stainless steel screw. Stainless steel screws will rust.
• The mold for the production of stainless steel screws is made of carbon steel. During the production process, some of the iron powder adheres to the screws,  the iron powder on the surface of the screws may rust.
• The surface of the stainless screw is attached with organic juice or screws placed in polluted air (such as the atmosphere containing a large amount of sulfide, carbon oxide, nitrogen oxide). In the case of condensed water, the protective film on the surface will be corroded. The screw will rust.
• Stainless steel surface with acid, alkali and salt substances, causing local corrosion.

The above are four common situations in which stainless screws can rust. If you want to know more about stainless screws, please contact us.：sst@szsst88.com