Zinc Coating

Zinc Coating Clear

 

Electro-deposited coatings of zinc on iron or steel with supplementary treatment, conforming to the European Standard: BS EN ISO 2081:2008 Fe/Zn8/a

 

Minimum local thickness is Zn to 8 microns with conversion passivate.

 

Our Clear Passivate uses a Trivalent system.

 

1) PRE-TREATMENT. This process involves the general cleaning of your goods remove oil and light scale. We use an alkaline based cleaner for this purpose.

 

2) ZINC PLATE. After the Pre-Treatment stage, a layer of Zinc coating is applied electrolytically. Where a specification is not detailed with the Purchase Order we will automatically process to BS EN ISO 2081:2008 Fe/Zn8/c. This is merely the current BS specification for Zinc Plating.

 

3) CHROMATE Finally the Zinc is coated with a Passivate, which is a Trivalent Chromium system to produce our clear coloured Passivate. The purpose of Passivation is to prevent the Zinc Coating from oxidising, in simple terms it acts like a sealant.

 

Salt spray test results for Zinc Plate with Clear Passivate will typically be approximately 48 hours.

 

Precautions with Zinc Surface Coatings and Treatments

 

Electroplated Zinc Coating / Chromated Passivated Zinc Coating

 

 

Risk of contamination from normal handling of zinc plated components is likely to be slight but normal hygiene precautions should be strictly observed.

 

Zinc plating should not be used where it may come into contact with acidic foods or liquids which could produce soluble zinc compounds.

 

Plated parts should not be allowed to come into contact with foodstuffs or used in containers for holding food or drinking water.

 

If zinc plated components are heated, for example, when soldering, welding or flame cuttings, or exposed to high temperatures, precautions must be taken to avoid inhaling white fumes. Where reasonably practical, local fume extraction should be provided in preference to the use of approved and suitable respiratory equipment.