Hard Chrome Plating

Hard anodizing, also known as hard anodization, is an electrolytic process used to create a durable oxide layer on the surface of components. Hard anodizing is primarily performed on aluminum alloys. The thickness of the layer, as well as its color, depends on the base aluminum alloy and the operational conditions of hard anodizing. The formed oxide layer improves the functional properties of the base alloy, primarily enhancing its mechanical properties such as hardness and abrasion resistance, as well as corrosion and thermal resistance.
Hard anodizing is environmentally friendly because the oxidation process strengthens the natural oxidation of aluminum, thus producing no heavy metals or other harmful and hazardous byproducts. BOMEX operates hard anodizing technology in a sulfuric acid solution.

Technical Parameters

  • High hardness: 300 to 600 HV 
  • Excellent abrasion resistance 
  • Increased corrosion resistance 
  • Electrical conductivity 
  • Heat resistance up to 2000°C

  • Technology characteristics 

  • The oxide layer is not applied to the base as in plating or coating; instead, it grows into and simultaneously out of the base material, making it directly integrated into the substrate. The resulting thin oxide layer is regularly porous, which can be utilized for subsequent coloring. Hard anodizing in sulfuric acid is primarily used in applications that require its excellent mechanical properties and its chemical and thermal stability. It complies with the standards ISO 10074, EN 2536, BS 5599, MIL-A-8625, AMS 2468, AMS 2469, ASTM B580.
  • Layers

  • 5 – 100 µm
  • Maximum dimensions of parts:

  • Length: 2 m
  • Weight: 650 kg

Base Materials

Aluminium and its alloys

Advantages of the Technology

    • High Hardness One of the significant advantages of hard anodizing is the hardness of the resulting surface, which depends on the specific alloy and the anodizing process.  

    • Excellent Abrasion Resistance The abrasion resistance of the hard anodized surface is comparable to tool steel or hard chromium, roughly ten times higher than that of conventional anodizing.

    • Electrochemical Stability The inertness of the hard anodized surface ensures resistance to corrosion, long-term durability, and color stability.  

    • Heat Resistance Hard anodized components are suitable for demanding applications such as ironing plate surfaces or kitchen pan coatings.

How Do We Work?


Submit an Inquiry

Whether you are from Prague, Brno, Vsetín, or Bratislava, you just need to fill out the inquiry form, or alternatively, call us or send an order for metal surface treatment to BOMEX via email.


Order Registration

We will register your order at BOMEX and send you a confirmation via email. If it's an individual solution for metal surface treatment, our colleagues will contact you for further info.


Expert Consultation

Based on our extensive experience, we will propose an optimal solution tailored specifically to your order in the field of metal surface treatment.


Order Processing

Your parts get processed according to the selected surface treatment.


Parts Inspection

The output inspection will reveal any imperfections in the coating – in addition to visual inspection, we use measuring instruments to determine layer thickness, possible porosity, adhesion etc.



We will contact you, the customer, who can pick up the parts at our location in Vsetín, or we can arrange packaging and direct delivery to you.

Do you have a question for BOMEX?

Write us, and we will get back to you by the next working day.

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