Replace Chromate Conversion Coatings
We must stop using Chromate Conversion Coatings but I still need to provide some protection for the Aluminium components I produce – what options do I have?
Many companies are designing out any Hexavalent Chrome coating from their products. A number of alternatives are worth considering. In most cases it is important to understand exactly why the Chromate was specified originally and what level of performance it has been providing but we can generalise on three key areas:
Corrosion protection
Preparation/undercoat for painting
Electrical conductivity
There are a number of non-Chromate Conversion Coatings that have been developed to give similar levels of performance to the standard Chrome solutions, they can provide similar levels of corrosion protection, are a good base for painting and can meet most electrical conductivity requirements.
Alternatives include Sulphuric Anodising or Phosphoric Anodising (although these will not provide the same electrical conductivity options). IVD Aluminium coating can offer a good option for some applications although there usually is a higher cost.
For specific advice on your specific needs, we would be happy to propose a specific alternative treatment and produce some samples for you – just get in touch with us to discuss your specific application.