Zinc Plating - Enviro Zinc 5
Suitable only for steel components.
Key Benefits
- Promotes more even smoother finish
- Completely cyanide free posing no risk to the environment or processors
- Gives good passivation including a high quality blue finish
- Excellent covering power
- Can give extremely bright deposits
- Extremely good ductility
Capabilities
Zinc is a bluish-white, lustrous metal which is hard, crystalline and brittle. The metal is electronegative to iron and gives excellent corrosion resistance, particularly in industrial and urban environments. Zinc readily alloys with many other metals and one of its primary uses is in an alloy form for ‘zinc base die castings’ which are of importance in the metal finishing trade.
The value of zinc as a rust-proof finish for iron and steel has long been appreciated, and galvanising means of the molten metal practised for at least two centuries. In recent years electro deposition of zinc has made rapid strides and is now used extensively for finishing all manner of iron and steel products including castings, forgings and sheet steel pressings.
Zinc plating is being used on an increasing scale, particularly in the electrical industry for components which would formerly have been cadmium plated.
Gold and Silver
Gold passivation is chromate based which creates an oxide layer to the component to enhance corrosion resistance and can be heat treated for hardness to eliminate brittleness. It is also recommended for electronic components and performs particularly well in open harsh environments. Silver passivation is Nitric based giving a ‘blue’ finish. It is generally used on wearing and moving parts. This process adheres well to zinc and provides a more durable finish. Silver is more commonly used on enclosed components.
Olive Drab and Black
Olive Drab gives a Khaki green finish and is chromate based but is generally applied over 10 microns which is most applicable to oil and gas industries where very heavy corrosion occurs. Black Zinc is also chromate based and performs similar to Olive Drab. It is generally preferred for aesthetic qualities in mining, defence and electronic industries.
Specifications
To AS 1789 - 1994
Bath Capacity
4000 x 1000 x 1700
