Zinc Plating

Zinc plating is a form of electrochemical galvanisation.

The passivation on zinc gives an extra protection and determines its final colour. Zinc plating is available on components made of steel, copper or brass in vat or barrel version.

Barrel plating is available in acid based zinc solution, which is ideal for small items like bolts, fixings, perfect for cast material.

Vat plating is available in cyanide based zinc solution, which is used for medium to large items.

For any high-tensile items we can offer de-embrittling process after plating.

We are in the process of installing new tanks for alkaline and acid zinc solutions to meet all your requirements.

Blue (trivalent) passivate, also known as bright/ clear, is most popular, due to its attactive silver colour. It is least protective passivate in comparison with green and yellow. It gives on average a protection of 24 hours salt spray to white corrosion (48-72 hours to red corrosion/rust).

Yellow (hexavalent) passivate, also known as zinc & colour, is a thicker layer passivate. It is very popular, due to its great protection and attactive irredescent deep yellow colour. It is much more protective passivate in comparison with blue or black. It gives on average a protection of 140 hours salt spray to white corrosion.

Thick trivalent yellow passivate is getting more and more popular with our customers due to its enviromentally friendly basis (no hexavalent chromium) and a great protection and attactive very light yellow colour with a hint of irredescence. It still gives the same protection as the 'soon old-fashioned' hexavalent yellow passivate - on average a protection of 140 hours salt spray to white corrosion.

Green /Olive drab (hexavalent) passivate is very popular in old motor/bike restoration and military circles due to its very specific dark matt green colour. It gives the best protection out of all available passivates, on average 200 hours salt spray to white corrosion.

Black (hexavalent) passivate is also very popular, due to its attactive modern black colour with slight hint of irredescence. It is, just like the blue, least protective passivate in comparison with green and yellow. It gives on average a protection of 24 hours salt spray to white corrosion (48-72 hours to red corrosion/rust).