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🔧 What is Hard Chroming?

  • A thick layer of chromium (typically 20–500 microns) is electroplated onto steel or other metal substrates.

  • The process is carried out in a chromic acid bath using direct current.

  • Produces a hard, durable, and corrosion-resistant surface.

⚙️ Key Properties

  1. Hardness

    • Extremely hard (800–1000 Vickers hardness, harder than most steels).

    • Excellent resistance to wear, abrasion, and galling.

  2. Low Friction

    • Reduces friction between moving parts.

    • Improves performance in sliding/rotating components.

  3. Corrosion Resistance

    • Protects metal from rust, oxidation, and chemical attack.

  4. Restoration

    • Can restore worn or undersized parts to original dimensions.

🛠️ Applications

Hard chroming is widely used in industries where parts undergo high wear, high pressure, or corrosive environments:

  • Hydraulic cylinders, piston rods, and rams

  • Engine components (crankshafts, camshafts, valve stems)

  • Molds and dies for plastics and metal forming

  • Aerospace parts (landing gear, actuators)

  • Printing rollers, textile machinery, mining equipment

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