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)
- 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
- Sulphuric Acid Anodising
- Chromic Acid Anodising
- Tartaric Acid Anodising
- 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.