Article written by Zinchro SA:

Chromadek is a product of Mittal Steel. It is South Africa’s trade name for a range of colour coated sheet products.

It is the result of coating sheets on a sophisticated production line, where steel surfaces are cleaned, and a priming coat is applied.

The process allows accurate control and measurement of the coatings applied from its treatment and paint application to curing conditions.

Over and above its aesthetic attributes, chromadek paint coatings are designed to provide superior corrosion protection under conditions where the performance of unpainted galvanised sheeting may prove inadequate.

The Chromadek market in South Africa has grown tremendously in recent years and Chromadek is well known for its flexibility as well as related strength and durability.

Chromadek is however only suitable for use at a distance of 5 km from the sea front and it is not advisable to use Chromadek for heavy industrial exposure.

Chromadek is sold as either coils or cut to length. Coils range from 1 ton up to 6 tons.

For more information and supply of Chromadek refer to the www.zinchro.co.za and speak to the Zinchro SA team.

8 February 2019

www.zinchro.co.za

https://zinchro.co.za/chromadek-industry-news/

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Chromadek has multiple uses.

It is used in interiors for diverse options such as Ceiling strips and cold rooms and light fittings.

Chromadek is also used in appliances such as geysers, air conditioning units and Fridge and freezers.

For the external application use Chromadek is used for signage, roofing and cladding as well as garage doors.

The use of chromadek in so many applications is due to its durability and flexibility. It is lighter then steel and as such is being used more extensively.

CHROMADEK® is produced in a range of 14 standard colours

Fish Eagle White

White Lion

Gemsbok Sand

Sandstone Beige

Kalahari Red

Buffalo Brown

Traffic Green

Aloe Green

Umhlanga Wave

Azure Blue

Kingfisher Blue

Dove Grey

Dark Dolphin

Charcoal Grey

This allows for versatility of use for Architects to design accordingly. In the signage industry Chromadek is primary sold as a dove grey base to which vinyl is applicated on. Signage companies with UV printers are able to print directly onto the Chromadek.

 

Chromadek also comes in the following thicknesses

Nominal Thickness (mm)              Nominal Width (mm)

0.47                                                        925, 1225

0.50                                                        925, 1225

0.53                                                        925, 1225

0.58                                                       925, 1225

0.80                                                        925, 1225

For more information and supply of Chromadek refer to the www.zinchro.co.za and speak to the Zinchro SA team.

Or Call the landline on 012 752 9710

Or email on

orders@zinchro.co.za

operations@zinchro.co.za

15 February 2019

www.zinchro.co.za

https://zinchro.co.za/chromadek-industry-news/

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Chromadek technical specifications.

Article written by Zinchro SA:

Chromadek® is available in a range of 14 standard colours based on a resin paint system consisting of Polyester/Polyurethane blends in specialised pigments ensuring corrosion resistance, durability and response to formability.

Coating configuration: Chromadek® is available as either Chromadek® Standard or Chromadek® Ultim designed for exposure and use in different atmospheric conditions:

Chromadek comes in these Standard colours

Standard colours

Name Colour % Gloss at 60°
(± 5 %)
Mittal Steel SA Reference number
Fish Eagle White White 30 N14128
White Lion White 30 N15010
Gemsbok Sand Dark Beige 30 N15366
Sandstone Beige Beige 30 N15365
Kalahari Red Red-Brown 30 N06541
Buffalo Brown Brown 30 N09412
Traffic Green Green 30 N03002
Aloe Green Light Green 30 N03283
Umhlanga Wave Turquoise 30 N02103
Azure Blue Blue 30 N01109
Kingfisher Blue Light Blue 30 N01029
Dove Grey Light Grey 30 N13639
Dark Dolphin Dark Grey 30 N13030
Charcoal Grey Dark Grey 30 N13012

Chromadek Paint system properties

Property
Test conditions
Method
Typical values
Chromadek
Chromadek Plus
Resistance to colour change QUV-B ASTM G154
ISO 7724/1/2/3 + ISO 3668

After 500 hrs:

DE < 5

After 1000 hrs:

DE < 6

Resistance to chalking QUV-B ASTM G154
ISO 4628-6
After 500 hrs:
Rating 1 – 2
After 1000 hrs:
Rating 1 – 2
Resistance to corrosion:
– Edge creep
– Blister size
Salt Spray

ISO 7253

ASTM D1654
ISO 4628/2

After 500 hrs:

5mm max
2-S2

After 1000 hrs:

5mm max
2-S2

Flexibility:
T-bend test
  ASTM D4145 3T
No adhesion loss
2T
No adhesion loss
Flexibility:
Reverse impact
  ISO 6272 No cracks
No adhesion loss
No cracks
No adhesion loss
Pencil Hardness   ISO 15184 F – H F – H
Scratch Hardness   ISO 1518 25 – 40 N 25 – 40 N
Dry Film Thickness   ISO 2808, 5B 22 µm minimum inclusive of primer 38 µm minimum inclusive of primer
Specular Gloss at 60° At time of coating ISO 2813 25 – 35% 25 – 35%

 

 

The nominal thickness includes the zinc coating, but excludes the paint system: The nominal thickness will be branded on the coils.

CHROMADEK® paint coatings are designed to provide superior corrosion protection under conditions where the performance of unpainted galvanised sheeting may prove inadequate. Furthermore, the coatings exhibit excellent formability and elasticity to facilitate roll profiling and bending operations without damage to the paint coating.

Chromadek is applied onto a galvanised coated substrate, which has been produced by the addition of Antimony and Aluminium to the molten zinc in the bath, to improve the formability and adherence of the zinc coating.

Excellent paint adhesion is achieved and corrosion resistance enhanced by careful preparation of the steel surface prior to paint application. Rigid quality control testing is carried out on each coil to ensure conformance to specification.

The atmospheric conditions to which the CHROMADEK® sheeting will be subjected, will determine which of the following paint systems should be specified:

Standard CHROMADEK® is intended for use under rural, mildly chemically polluted or moderate marine conditions, and is composed of Z275 hot-dip galvanised substrate pre-primed with an epoxy/chrome free primer (dry film thickness (DFT) of 4-6 microns) and finished with a final paint coat (DFT 18-22 microns) on the top surface. A single backing coat (DFT 8 microns) is normally applied to the reverse side of the sheet.

CHROMADEK® PLUS is intended for heavy industrial or marine conditions, and is composed of Z275 hot-dip galvanised substrate, pre-primed with a primer with DFT of 20-25 microns (4-times thicker than the standard CHROMADEK® primer coat) and finished with a final coat (DFT 18-22 microns) on the top surface, giving a total coating thickness of 38-47 microns.
The bottom surface can either be coated with the CHROMADEK® top surface paint system i.e. 4-6 microns primer and 18-22 micron topcoat, or the CHROMADEK® PLUS top surface paint system.

For more information and supply of Chromadek refer to the www.zinchro.co.za and speak to the Zinchro SA team.

Or Call the landline on 012 752 9710

Or email on

orders@zinchro.co.za

operations@zinchro.co.za

15 February 2019

www.zinchro.co.za

https://zinchro.co.za/chromadek-industry-news/

Download Article