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
Construction Skills Mission Board launch sector drive
Newly formed government and industry collaboration set strategy for recruiting an additional 100,000 construction workers a year.
New Architects Code comes into effect in September 2025
ARB Architects Code of Conduct and Practice available with ongoing consultation regarding guidance.
Welsh Skills Body (Medr) launches ambitious plan
The new skills body brings together funding and regulation of tertiary education and research for the devolved nation.
Paul Gandy FCIOB announced as next CIOB President
Former Tilbury Douglas CEO takes helm.
UK Infrastructure: A 10 Year Strategy. In brief with reactions
With the National Infrastructure and Service Transformation Authority (NISTA).
Ebenezer Howard: inventor of the garden city. Book review.
The Grenfell Tower fire, eight years on
A time to pause and reflect as Dubai tower block fire reported just before anniversary.
Airtightness Topic Guide BSRIA TG 27/2025
Explaining the basics of airtightness, what it is, why it's important, when it's required and how it's carried out.
Construction contract awards hit lowest point of 2025
Plummeting for second consecutive month, intensifying concerns for housing and infrastructure goals.
Understanding Mental Health in the Built Environment 2025
Examining the state of mental health in construction, shedding light on levels of stress, anxiety and depression.
The benefits of engaging with insulation manufacturers
When considering ground floor constructions.
Lighting Industry endorses Blueprint for Electrification
The Lighting Industry Association fully supports the ECA Blueprint as a timely, urgent call to action.
BSRIA Sentinel Clerk of Works Training Case Study
Strengthening expertise to enhance service delivery with integrated cutting-edge industry knowledge.
Impact report from the Supply Chain Sustainability School
Free sustainability skills, training and support delivered to thousands of UK companies to help cut carbon.
The Building Safety Forum at the Installershow 2025
With speakers confirmed for 24 June as part of Building Safety Week.
The UK’s largest air pollution campaign.
Future Homes Standard, now includes solar, but what else?
Will the new standard, due to in the Autumn, go far enough in terms of performance ?
BSRIA Briefing: Cleaner Air, Better tomorrow
A look back at issues relating to inside and outside air quality, discussed during the BSRIA briefing in 2023.
Restoring Abbotsford's hothouse
Bringing the writer Walter Scott's garden to life.
Reflections on the spending review with CIAT.