Zinc Plating

Example of zinc plating and clear passivation Clear passivated zinc plating
Example of zinc plating and colour passivation Colour passivated zinc plating

We offer zinc plating as a protective treatment for steels and brass. Zinc plating is useful both as a standalone treatment and as a pretreatment for powder coating. Zinc plating is considerably more resistant to corrosion than phosphating.

Zinc plating is a form of galvanisation (however, it is not the same as hot dip galvanisation). Essentially, a layer of zinc is electro-deposited on to the part and then forms a thin oxide layer which protects both the remainder of the zinc layer and the base metal.

Although a simple zinc coating provides good corrosion resistance, it can be further improved by passivating the part after applying the zinc. We offer two passivates for this purpose — "clear" passivate and "colour/yellow" passivate. The "clear" passivate is free from hexavalent chromium and is RoHS compliant. The "colour" passivate unfortunately does contain chromium (VI) but does provide slightly better corrosion resistance. We also offer a black passivate, which is primarily for decorative purposes, our black passivate is RoHS compliant.

We also have the facilities to remove rust, damaged coatings, etc. prior to zinc plating.

We use a fully automatic plant to perform our zinc plating. This allows us to produce very consistent and high quality coatings. We can also produce both large and small volumes of work for very competitive prices.

Specifications/Standards

Our zinc plating process conforms to: