Do Stainless Steel Screws Rust ?

Do stainless steel screws rust? Stainless steel screws are a type of fastener often used in daily life, with good corrosion and rust resistance. However, even stainless steel screws may rust. So, why do stainless steel screws rust?

Stainless steel screws usually refer to steel screws that have the ability to resist corrosion by air, water, acids, alkalis, salts or other media. Stainless steel screws are generally not easy to rust, durable, and can be used in environmental protection equipment, medical equipment, communication equipment and other fields.

Causes Of Stainless Steel Screws Rust
Storage in the production process

Causes Of Stainless Steel Screws Rust

Screw Surface Reasons

The surface of stainless steel screws is not completely smooth, there are some tiny bumps and defects. These bumps and defects are prone to the accumulation of dirt and moisture, which leads to corrosion and rust.

Stainless Steel Material Grade Reasons

The material of stainless steel screws also affects their corrosion resistance. Different models of stainless steel have different corrosion resistance, of which 304 and 316 models are more common.

304 stainless steel has better corrosion resistance and rust resistance, while 316 stainless steel has better corrosion resistance and rust resistance.

Reasons For Surface Treatment

Common surface treatments include galvanisation, spraying, passivation and so on. If the surface treatment is improper or the surface layer is damaged, the corrosion resistance of stainless steel screws will be affected, resulting in rust.

Use Environment

Although stainless steel has good corrosion resistance, in certain environments, such as humidity, salt, etc., stainless steel screws may still be corroded and rust.

In addition, the surface of the stainless steel screws may also be scratched, abraded or in contact with other metals, etc. These factors may destroy the oxide film on the surface of the stainless steel, resulting in rust.

Cleaning Reasons

Stainless steel screws are not cleaned, especially hexagonal stainless steel, due to the reason of hexagonal cup head, the head of the deep hole cleaning time is not enough, anisotropic surface impurities remain, after a long time of outdoor use, the cup head of the internal rust began to appear, and corrosion of the screw head.

Stainless Steel Raw Material Quality

The quality of stainless steel screws is also one of the most important factors affecting their corrosion resistance. Some poor quality stainless steel screws may contain more impurities or carbon elements, which will reduce its corrosion resistance. So even 304 stainless steel screws or high grade stainless steel screws may rust.

Storage In The Production Process

At the same time, the manufacturing process and storage of stainless steel screws will also have an impact on its corrosion resistance. Stainless steel screw molds and production equipment, including storage and storage, are steel materials.

Stainless steel and carbon steel contact, there will be iron residue on the surface, over time, such as in a humid environment, pitting corrosion reaction will occur, and produce rust spots.

Our stainless steel screws in the cleaning and drying, are put into the stainless steel storage barrel, and the bottom with paper, to prevent moisture. It can solve the risk of rusting due to the production process.

Reasons For Stainless Steel Screws Rust
Stainless Steel Material Grade Reasons

Summary

Do stainless steel screws rust? The reasons for stainless steel screws to rust mainly include surface bumps and defects, material and surface treatment, and other factors. In order to prevent stainless steel screws from rusting, it is necessary to keep them clean and dry during use, avoid contact with corrosive media, and choose the right type and surface treatment.

We, Ding Fasteners which is the leading manufacturer of stainless steel screws, know well all stainless steel materials, control all ss bolts and nuts without ruest from our production to the end users.

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