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What are main methods of fasteners surface treatmnet

Vangel 2023-08-17 14:33:39

Surface treatments for fasteners include various processes to improve their corrosion resistance, wear resistance, lubrication, and aesthetic appearance. Here are some common surface treatment techniques for fasteners:

  1. Galvanizing: Immersing the fasteners in a hot-dip zinc bath to form a protective zinc layer, enhancing corrosion resistance. Common methods include electroplating and hot-dip galvanizing.

  2. Nickel plating: Electroplating the fastener surface with nickel to improve corrosion resistance and wear resistance.

  3. Phosphating: Treating the fastener surface with phosphating solutions to form a phosphate film, increasing friction coefficient and lubrication.

  4. Passivation: Applying a passivation treatment to form an oxide film on the fastener surface, enhancing corrosion resistance.

  5. Carburizing: Heating the fasteners to high temperatures in a carbon-rich environment, increasing surface carbon content to improve hardness and wear resistance.

  6. Coating: Applying coatings or paints to the fastener surface, improving appearance, corrosion resistance, and reducing friction.

  7. Nitriding: Exposing fasteners to nitrogen-rich atmospheres, forming a nitride layer through nitridation reaction, enhancing hardness and wear resistance.

These processes can be selected and combined based on the specific requirements and types of fasteners.