Colour coated steel sheet
[edit] Introduction
Colour coated steel sheet is widely used as it offers aesthetic and durable solutions for residential, commercial and industrial applications.
[edit] Commonly used substrates
There are different kinds of base metal for making colour coated steel, including; cold rolled sheet, which is a cheaper material with a smooth and beautiful appearance but it has poor corrosion resistance and should only be used for temporary isolation measures and indoor materials.
Hot dipped galvanized sheet is the most commonly used substrate. First of all, the thick zinc coating makes it more resistant, and the painting on the surface acts as a barrier to isolate and prevent rust. Also, it provides more colour options.
Electro galvanized sheet is also a kind of substrate for making PPGI sheets. Compared to hot-dipped galvanized sheets, its layer of zinc is less than 20 g/m2. It has a smooth surface, but is not as durable as hot-dipped galvanized steel. Generally, it is mainly applied in home appliances and indoor environments.
Galvalume sheet is often used as a customized substrate for some special orders. It contains 55% aluminium, 43.5% zinc, and 1.5% silicon, which is suitable for applications that demand high corrosion resistance and heat reflectivity. Pre-painted galvalume sheet is more expensive.
=
Main Applications =
Due to its numerous merits, it can be used directly or further processed for other use. Normally colour coated steel sheet concentrates on four fields:
- Construction is the most commonly used area. PPGI and PPGL sheets can be applied in airports, warehouses, refrigerated storage and so on.
- Home appliance occupies the second biggest part of the market due to the craftsmanship and production requirements. Colour coated sheet with electro galvanized sheet and cold rolled sheet as substrates are are commonly used in the production of large air-conditioning systems, freezers, furniture, etc.
- Transportation plays a smaller part in the market. It can be used in the interior decoration of cars and trains, containers, oil purifiers, etc.
- It's also involved in some other fields like packing, shipping, optical materials, and the electric industry.
[edit] Related articles on Designing Buildings
Featured articles and news
Apprenticeships and the responsibility we share
Perspectives from the CIOB President as National Apprentice Week comes to a close.
The first line of defence against rain, wind and snow.
Building Safety recap January, 2026
What we missed at the end of last year, and at the start of this...
National Apprenticeship Week 2026, 9-15 Feb
Shining a light on the positive impacts for businesses, their apprentices and the wider economy alike.
Applications and benefits of acoustic flooring
From commercial to retail.
From solid to sprung and ribbed to raised.
Strengthening industry collaboration in Hong Kong
Hong Kong Institute of Construction and The Chartered Institute of Building sign Memorandum of Understanding.
A detailed description from the experts at Cornish Lime.
IHBC planning for growth with corporate plan development
Grow with the Institute by volunteering and CP25 consultation.
Connecting ambition and action for designers and specifiers.
Electrical skills gap deepens as apprenticeship starts fall despite surging demand says ECA.
Built environment bodies deepen joint action on EDI
B.E.Inclusive initiative agree next phase of joint equity, diversity and inclusion (EDI) action plan.
Recognising culture as key to sustainable economic growth
Creative UK Provocation paper: Culture as Growth Infrastructure.
Futurebuild and UK Construction Week London Unite
Creating the UK’s Built Environment Super Event and over 25 other key partnerships.
Welsh and Scottish 2026 elections
Manifestos for the built environment for upcoming same May day elections.
Advancing BIM education with a competency framework
“We don’t need people who can just draw in 3D. We need people who can think in data.”