Why do stainless steel screws rust

Update:08-04-2021
Summary:

In fact, many people think that stainless steel screws […]

In fact, many people think that stainless steel screws will not rust. But in daily life, sometimes we ourselves will find that the home appliances we use are still some accessories on the doors and windows. In fact, the stainless steel screws have begun to rust. Why?

1. Stainless steel screws have strong scandium corrosion ability, high temperature performance, and good anti-rust performance. But in fact, it will still rust in some harsh environments. If stainless steel screws are in a humid environment for a long time or are in contact with acid-base chemicals, they will inevitably be corroded and rusted. In addition, the rust of stainless steel screws is also related to its own material. The material is not good, and the corrosion-like performance is naturally poor.

2. Stainless steel screws rely on the thin, firm and dense surface of the chromium-rich oxide film, which mimics the continued penetration of oxygen atoms and continues to oxidize. And the ability to get scandium rust. Once the film is continuously destroyed due to external environmental factors, oxygen atoms in the air or liquid will continue to infiltrate, or iron atoms in the metal will continue to separate out to form loose iron oxide, and the metal surface will also receive Constant corrosion.

In summary, it is necessary to keep the metal surface of stainless steel screws bright. In daily life, we must often clean and scrub the surface of stainless steel screws to remove attachments and eliminate external factors that cause corrosion. In addition, when we purchase stainless steel screws, we must also choose a screw manufacturer with good product quality and suitable, such as Hangzhou Lizhan Hardware Co., Ltd.

https://www.lizhan-hardware.net/