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Conversion on Aluminum

Conversion coatings produce a thin film on aluminium which is amorphous in structure and hydrated with water. The process is used in a wide range of applications such as corrosion resistance, where electrical conductivity is required on a specific area of a part. It is also used as an undercoat for paints, where it improves the adhesive strength and the corrosion protection.

SWMF offers a Hexavalent Conversion (Alocrom), as well as the environmental friendly alternative SurTec 650)

Plating Capabilities

  • Precision masking available for selective plating
  • ALOCROM 1200: when applied for corrosion protection.
  • ALOCROM 1000: when applied for conductivity
  • BRUSH ALOCROM available
  • SurTec 650: Hexavalent Free Conversion
  • SurTec 650 Marker-Pen available (Hexavalent Free)
  • Irridite NCP

Typical Applications Of Chromate Conversion

  • Bonding points for elec. contact on anodised parts
  • Undercoat for paint finishes
  • Corrosion Protection

Related Finishes

  • Sulphuric Acid Anodising
  • Chromic Acid Anodising
  • Tartaric Acid Anodising

Environmental

  • Hexavalent Chrome Compounds such as chromic acid, which is used for the ALOCROM Conversion are carcinogenic. Therefore the EU-regulation REACH considers chromic acid as a substance of very high concern which means that a further use of the substance after set 17 could only be possible with authorisation. 

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