Hydraulic & Pneumatic

In the hydraulic and pneumatic industries, metal finishing is crucial to enhance the performance, durability, and functionality of components used in hydraulic and pneumatic systems. These finishing processes aim to improve corrosion resistance, reduce friction, and ensure optimal functionality under challenging conditions. Here are some common metal finishing methods used in the hydraulic and pneumatic industries:

  1. Zinc Plating:

    • Purpose: Zinc plating is employed to provide corrosion resistance to steel components used in hydraulic and pneumatic systems.
    • Process: Steel parts are immersed in a zinc plating bath, and a thin layer of zinc is deposited on the surface, creating a protective coating. This is often used for hydraulic fittings, fasteners, and components.
  2. Nickel Plating:

    • Purpose: Nickel plating is used for corrosion resistance, wear resistance, and improved surface finish.
    • Process: Components are electroplated with a layer of nickel, enhancing their resistance to corrosion and providing a smooth surface. Nickel-plated parts are common in hydraulic cylinders, valves, and other critical components.
  3. Chrome Plating:

    • Purpose: Chrome plating is applied for enhanced hardness, wear resistance, and improved corrosion resistance.
    • Process: Electroplating is used to deposit a layer of chromium onto the surface of steel or other metal components. This is often applied to piston rods, cylinder rods, and other components exposed to high wear and corrosion.
  4. Powder Coating:

    • Purpose: Powder coating is used for corrosion protection, improved aesthetics, and resistance to environmental factors.
    • Process: Electrostatically charged powder particles are sprayed onto the metal surface, creating a durable and even coating when cured. This is often applied to hydraulic reservoirs, pneumatic cylinders, and various components.
  5. Black Oxide Coating:

    • Purpose: Black oxide coating provides corrosion resistance and enhances the appearance of ferrous metals.
    • Process: Ferrous metals are immersed in a hot black oxide solution, creating a black finish and improving corrosion resistance. This is commonly used for fasteners, hydraulic fittings, and other components.
  6. Passivation:

    • Purpose: Passivation is applied to stainless steel components to remove free iron and improve corrosion resistance.
    • Process: A citric or nitric acid solution is used to clean the stainless steel surface, creating a passive oxide layer that protects against corrosion. This is important for hydraulic and pneumatic components where corrosion resistance is critical.
  7. Anodizing (for Aluminum):

    • Purpose: Anodizing is employed for aluminum components to enhance corrosion resistance and improve surface hardness.
    • Process: Aluminum parts are subjected to an electrolytic process, forming a protective oxide layer on the surface. This is used for pneumatic cylinder tubes, hydraulic pump components, and other aluminum parts.
  8. Nitriding:

    • Purpose: Nitriding is used to improve the surface hardness and wear resistance of steel components.
    • Process: Components are exposed to nitrogen-rich environments, enhancing the surface hardness and providing increased resistance to wear. This is often applied to hydraulic piston rods and other high-wear components.

Metal finishing in the hydraulic and pneumatic industries is crucial for ensuring the reliability and longevity of components that operate in demanding conditions. Manufacturers typically choose finishing processes based on the specific requirements of the components and the environmental conditions they will face in hydraulic and pneumatic systems.

Knowledge center download:
Learn More About:
Need a quote or have a question?
Let’s talk! From the simple to the complex, we’re ready.