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Metal Finishing Services

Silchrome Plating provide Zinc Plating with clear, yellow,black and olive drab passivation 


What is Zinc Plating?

Zinc Plating (also referred to as Galvanising) is one of the most widely used processes to extend part life and improve a components resistance to corrosion and wear. It is a thin sacrificial coating that can be sealed through passivation, enabling it to be produced in a number of different colours. It is popular due to its low cost and is available in Clear, Blue, Yellow, Black and Olive Drab passivates.

What is the Process?

Zinc Plating is an electro-plating technique in which parts are placed into a vat containing an electrolytic solution and a current is run into the bath promoting the build-up of the Zinc on the part. In order to obtain the best possible results, parts will first be subject to a number of pre-treatments depending on their material which are all carried out in house.

Zinc Plated items then undergo chromate conversion. Traditionally this Chromate Conversion utilised a substance known as Hexavalent Chromium, however this substance is a known carcinogen meaning it is bad for the environment and for our staff. As such we have started to offer Zinc Plating which utilises a Trivalent Chromium solution instead, which will provide the same performance as before but enables us to meet REACH criteria. Currently we still offer both Hexavalent and Trivalent solutions.

What are the Advantages?

Zinc Plating offers a good level of corrosion resistance for its cost. It is suitable for combatting the effects of oxygen and water but will not perform well in chemically corrosive environments. In order to improve the corrosion resistance properties, Zinc plated components are passivated and sealed and we can also offer de-embrittlement where needed.

Zinc Plating produces a coating that has high levels of protection in comparison to its thin nature. This makes it a popular choice for smaller sized components such as machined screws and threaded parts, but due to its low cost and versatility a number of steel parts used in civil engineering projects are actually Zinc Plated.

Zinc Plating is also used for decorative purposes and can be produced so as to be very bright in the nature of chrome plating.

Specifications Offered:

BS1706:1990, BS3382:Part 2, ASTM B633, ISO2081:1996, BS EN12329:2000, DEF STAN 03-20

What We Offer

Silchrome Plating are able to provide Zinc Plating as well as associated pre and post plating processes including polishing. We are able to facilitate a wide range of production volumes and can accommodate parts up to 2 metres in length as well as having a barrel plating facility for smaller components.

We currently offer Passivation that utilises either Hexavalent Chrome or Trivalent Chrome, but anticipate in the future, in order to comply to environmental standards we may only be able to offer Trivalent based Passivation moving forward.

Silchrome Offer the following Passivates: Clear (also called Blue) Yellow, Black, Olive Drab

All our processes are carried in house at our production facility in Leeds and Silchrome Plating are IS0 9001 AND ISO 14001 approved. 



Silchrome Zinc PlatingSilchrome zinc finishingSilchrome zinc electroplating

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  • The official logos for the ISOQAR and UKAS industry regulatory bodies.