Chromate
In contrast to anodising, chromating applies a soft, corrosion-resistant and conductive layer to your aluminium product. This conductive layer also serves as an adhesive base for wet and powder coating.
Chromate and colourless conversion coatings on aluminium
The chromate coating can be colourless or yellow. Our colourless conversion coating comes close to the resistance of classic yellow chromating, but is ROHS compliant. The process used is called Surtec 650.
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In the nanometre range
Summary
With chromating, the layer thickness is a few nanometres and cannot be measured. These coatings can become micro-cracked above 80°C, which can worsen the corrosion protection.
Low resistance
Advantages
The electrical contact resistance of chromate coatings is very low. It is usually more favourable than the electrical resistance of untreated parts. Chromate coatings are therefore very suitable for aluminium enclosure parts that must be conductively connected to each other to ensure the shielding effect of the enclosure.
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