Let's take a look at the materials and surface treatments of carriage bolts.

Carriage bolts perform well in many applications due to their unique structure and anti-rotation design. From the perspective of material and surface treatment, different choices can significantly improve the performance and service life of bolts.

Material

Carbon steel: The most common material, with good strength and economy, suitable for general application scenarios.

Stainless steel: With excellent corrosion resistance, suitable for humid or corrosive environments, such as outdoor construction, shipbuilding, etc.

Alloy steel: By adding different alloy elements, the strength, hardness and wear resistance of the bolts are improved, suitable for high-strength connection requirements.

Surface treatment

Hot-dip galvanizing: A thick layer of zinc is formed on the surface of the bolt, providing long-term anti-corrosion protection, suitable for outdoor and humid environments.

Electrogalvanizing: A thin layer of zinc is formed on the surface of the bolt by electrochemical methods, providing basic anti-corrosion ability, suitable for general indoor environments.

Nickel plating: Improves the corrosion resistance and appearance quality of the bolts, suitable for application scenarios with high requirements for appearance.

Chrome plating: forms a bright chrome layer on the surface of the bolt, enhancing wear resistance and corrosion resistance, while improving the decorative effect.

Phosphating: a chemical treatment method that forms a corrosion-resistant phosphating film to improve the corrosion resistance and surface hardness of the bolt.