Review of Different Types of GI Sheets
Contents |
[edit] Introduction
Galvanized iron sheet is one of the most commonly used steel materials in the world for homes, businesses, buildings, industries, automobiles, and so on. It is steel that has been coated with zinc to prevent corrosion and prolong service life.
[edit] Manufacturing method
[edit] Hot dipped galvanized sheet (HDG sheet)
HDG steel sheet is mainly produced by the continuous hot-dip galvanizing process. That is, the steel will be put into the molten zinc bath at temperatures of 500 degrees to form a close alloy film. This process provides a thicker zinc coating, about 30-275 g/m2, and can freeze into crystallized zinc spangles. They are mainly used in outdoor and harsh environments, including construction, machinery, infrastructure, mining, etc.
[edit] Electro galvanized sheet (EG sheet)
EG sheet is also called cold galvanized steel sheet, in which a layer of zinc is bonded to steel in order to protect against corrosion. The zinc coating will be applied by electro-deposition during the continuous electrolytic coating process at room temperature. It offers a thin but uniform zinc coating, about 10-50 g/m2. Its corrosion resistance is not as good as that of hot-dip galvanized steel sheet. Electro galvanized sheet is commonly applied in indoor places and environments that require less corrosion resistance but better aesthetics. Industries include automobiles, furniture, home appliances, vessels, electronic equipment, commerce, etc.
[edit] Corrugated galvanized sheet (CGI sheet)
This takes GI sheets as material and then profiles them into corrugated patterns with a roller mill, which will increase the bending and malleability strength of steel. They come in different forms such as trapezoidal, wavy, ribbed, and tile designs. Sometimes, it is also in the form of a flat sheet.
[edit] Plain GI sheet
Plain galvanized steel sheet is a metal sheet coated with protected metallic and organic zinc coatings, with no extra deformed design. Extensively used in the automobile, transportation, construction, home appliances, and civil engineering industries. It can work as the trunk, back panel or boards. It can be further processed for other uses, such as PPGI sheet/coil, corrugated GI sheet, fencing, steel piping, etc.
[edit] Related articles on Designing Buildings Wiki
Featured articles and news
Edmundson Apprentice of the Year award 2026
Entries now open for this Electrical Contractors' Association award.
Traditional blue-grey slate from one of the oldest and largest UK slate quarries down in Cornwall.
There are plenty of sources with the potential to be redeveloped.
Change of use legislation breaths new life into buildings
A run down on Class MA of the General Permitted Development Order.
Solar generation in the historic environment
Success requires understanding each site in detail.
Level 6 Design, Construction and Management BSc
CIOB launches first-ever degree programme to develop the next generation of construction leaders.
Open for business as of April, with its 2026 prospectus and new pipeline of housing schemes.
The operational value of workforce health
Keeping projects moving. Incorporating unplanned absence and the importance of health, in operations.
A carbon case for indigenous slate
UK slate can offer clear embodied carbon advantages.
Costs and insolvencies mount for SMEs, despite growth
Construction sector under insolvency and wage bill pressure in part linked to National Insurance, says report.
The place for vitrified clay pipes in modern infrastructure
Why vitrified clay pipes are reclaiming their role in built projects.
Research by construction PR consultancy LMC published.
Roles and responsibilities of domestic clients
ACA Safety in Construction guide for domestic clients.
Fire door compliance in UK commercial buildings
Architect and manufacturer gives their low down.