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
Colour
Passivation: We can turn your zinc red green or blue.
Capabilities
New Zinc Plating Line 4m x 1.5m x 1.5m.
Dual Crane Operating SystemZinc 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
ZINC PLATING
ZINC Plating is widely employed for providing sacrificial protection to steel. Being electronegative to iron, meaning that the zinc will corrode preferentially to the underlying metal, zinc plating gives excellent corrosion resistance to iron and steel components, particularly in industrial and urban environments.
ZINC Plating provides an attractive finish with a relatively uniform thickness, which does not tend to fill up slots and screws holes or obliterate threads and other fine details of work. The coating can subsequently be passivated or dyed to further improve corrosion resistance or for part identification.
ZINC Plating also serves as an effective undercoat for powder coated and wet paints.
Corrosion Protection of Chromate Coatings
|
Type of Chromate |
Time to white salts on zinc plate |
Australian Standard for Zinc Electroplated Coatings
on Iron and Steel - AS 1789-1984
|
Service Condition |
Classification Code |
Minimum Thickness |
Service Condition 4 is for exceptionally severe corrosion conditions such as marine parts, some exterior motor car and motor cycle components and those exposed to industrial atmospheres.
Service Condition 3 is for severe corrosive conditions such as washing machine components and moderate outdoor exposures such as bicycle parts and some exterior motor car components.
Service Condition 2 is for moderate corrosive conditions such as indoor conditions where condensation may occur.
Service Condition 1 is for mild, dry indoor conditions
The letter c indicates that a chromate treatment is to be applied.
