Stainless Steel Hex Bolt SS304 M6 5/16 Inch Passivated Finish Corrosion-Resistant for Outdoor Use

Product Description:

Made from SS304 stainless steel, this hex bolt is known for its excellent resistance to corrosion, making it suitable for both indoor and outdoor environments. The M6 size with a 5/16-inch thread provides secure fastening for small to medium mechanical assemblies. The passivated finish enhances the bolt’s resistance to rust and corrosion, making it ideal for outdoor use, including in construction, automotive, and mechanical applications. The bolt is highly durable, able to withstand exposure to weather, moisture, and environmental wear without losing strength or performance.

Hexagon Bolt Stainless Steel SS316L M10 9/16 Inch Polished Finish Corrosion-Resistant for Chemical Industry: The SS316L stainless steel hexagon bolt is designed for superior resistance to chemical corrosion. Its low carbon content ensures greater flexibility and prevents carbide precipitation, which is especially beneficial in high-temperature and chemical environments. The M10 size with a 9/16-inch thread provides a strong, secure hold in various industrial applications. The polished finish offers enhanced corrosion protection while improving aesthetic appearance. This bolt is ideal for use in the chemical industry, where resistance to corrosive substances, acids, and extreme temperatures is essential. It is also suitable for food processing plants, pharmaceutical equipment, and other facilities that require high-quality, durable fastening solutions.

Applications

A passivated finish is a surface treatment process commonly applied to stainless steel and other corrosion-resistant materials to enhance their resistance to corrosion and improve their appearance. Here are the key aspects of a passivated finish:

1. Definition

Passivation is a chemical process that removes free iron and other contaminants from the surface of stainless steel, and it promotes the formation of a uniform, protective oxide layer (passive film) on the surface. This passive film is primarily composed of chromium oxide and is highly resistant to corrosion.

2. Purpose

Corrosion Resistance: The primary purpose of passivation is to improve the corrosion resistance of stainless steel by creating a chemically inert surface. This helps prevent rust and other forms of corrosion, especially in harsh environments.

Surface Cleaning: Passivation removes surface impurities, such as free iron, oils, grease, and other contaminants that may have been introduced during manufacturing or machining processes.

Aesthetic Improvement: Passivation can enhance the appearance of stainless steel by providing a uniform, shiny surface.

3. Process

Chemical Bath: The stainless steel component is immersed in a passivating solution, typically an acidic bath containing nitric acid (HNO₃) or citric acid. The acid reacts with the surface to dissolve free iron and other contaminants.

Formation of Passive Layer: The chemical reaction also promotes the formation of a thin, transparent oxide layer (passive film) on the surface. This layer is rich in chromium oxide and is highly resistant to corrosion.

Rinsing and Drying: After the passivation process, the component is thoroughly rinsed to remove any residual chemicals and then dried.

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