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Processes

 
Powder Coating

Powder Coating plantPowder coating is an advanced method of applying an aesthetic and protective finish to a wide range of products. It is a 'dry' finishing process, using finely ground electrostatically charged particles of pigment and resin which are sprayed onto electrostatically grounded parts. The powder adheres to the parts and are held in place until they are processed through a high temperature curing oven (between 150 and 200 degrees C) to form a smooth, durable high quality finish.

A selection of Polyester, Epoxy and hybrid materials, in a variety of colours and gloss levels, offers protection against corrosion and weathering, while meeting a range of specification levels including Class 'A' visual standards.

Pre-treatment is necessary if the powder coating is exposed to humidity, the presence of chemical or for outdoor applications.

High quality and flexibility are the main feature of our facilities. In our number one plant superb finish is consistently achieved by applying zinc phosphate which gives excellent corrosion resistance on steel, zinc and zinc castings. The inline process controls virtually eliminates contamination resulting in high quality finished components. Our number two plant is dedicated to the high level of protection required for aluminium components by applying a pre-treatment conversion coating which gives excellent corrosion resistance on aluminium steel and zinc castings. Consistency is maintained by the inline process controls for powder coating the components, thus ensuring salt spray resistance in excess of 480 hours.Our plants are flexible by being capable of processing small and large components in volume. We have the capability to apply aluminium protection systems enabling rapid response to customers requirements.

Powder Coating Specifications

Plant Capacity

In-line ZINC PHOSPHATE pre-treatment
Maximum Length: 2.0 M
Maximum Height: 1.4 M
Maximum Width: 0.5 M

In-line CHROMATE/ NON-CHROME pre-treatment
Maximum Length: 1.8M
Maximum Height: 1.7 M
Maximum Width: 0.45 M

 

 
Typical Physical Properties
Gloss level at 60 degree angle: 15-90% (according to specification)
Film Thickness: 40-200 microns (according to specification)
Adhesion:
(BS3900 part E6)
No detachment - 100% pass, 2mm crosshatch
Impact resistance:
(BS3900 part E3)
Pass 2.5mm indentation
Flexibility:
(BS3900 part E1)
Pass 6mm
Hardness:
(BS3900 part E2)
Pass 400g
Erichsen cupping:
(BS3900 part E4)
Pass 8mm
Chipping resistance:
(FLTM EU-BI 7-1)
Pass
Stone Chipping:
(FLTM EU-BI 57-2)
Pass
Pencil Hardness:
(FLTM EU-BI 51-2)
Pass 3H

 

 
Chemical Properties
Resistance to salt spray:
(ASTM B117)
Pass 480+hours
Resistance to humidity:
(BS3900 part2)
Pass 1000 hours
Water resistance:
(FLTM EU-BI 4-1)
Pass 1000 hours
Heat Stability: Stable at temperatures up to 180 degrees C
Low temperature stability:
(-40 degrees C):
Unaffected after 6 hours exposure
Weathering resistance:
(24 months , 5 degrees south)
Minimal gloss reduction after 4000 hours
Resistance to chemicals: Resistant to most acids, alkalis oils and solvent at room temperature. May be affected by Ketones or Chlorinated solvents.

 

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