The process of putting a protective zinc coating to iron or steel to prevent corrosion is known as galvanisation or galvanization (or galvanising). The most popular procedure is hot dip galvanising, which involves immersing steel parts in molten zinc.
• It creates a barrier that stops corrosive chemical substances from gaining access to the underlying metallic or iron.
• The zinc acts as a sacrificial anode, making sure that even supposing the coating is scratched, the uncovered metallic remains protected.
• By corroding earlier than iron, zinc safeguards its base metal. • The zinc floor interacts with the surroundings to generate a dense, adhering patina this is impervious to moisture.
Advantages of galvanized steel
- Galvanized steel performs a lot better than normal steel in a variety of applications, over different environmental conditions and in different industrial applications.
- The coating gets perfectly glued to the steel surface, becoming an effective part of the steel.
- Steel becomes a lot more durable after the process of galvanization. The long-term durability that is provided by galvanizing is achieved at the relatively low burden on the environment in terms of energy (some of the steel varieties are reported to have lasted for around 100 years)
- The coated layer ensures that the final product is tough which essentially means that site damage is kept under a strict check
- The process of coating is very quick (gets finished within a matter of a few minutes). However, the preparation of Steelwork takes a bit longer and there are a number of other works that are being processed simultaneously.
- As Zinc occupies the top layer, it gets corroded in preference to steel, scarifying itself to protect the Steel.
- Common sizes used are:
0.75mm x 182mm x coil
0.95mm x 182mm x coil
1.15mm x 182mm x coil
1.45mm x 182mm x coil
- Both the external and internal surfaces of the steel components remain protected from corrosionASTM A653 Gr.80 / G550 Grade of Galvanized slitted coils
- G550 galvanized steel is hot dipped zinc coated structural steel with a spangled surface with the assured minimal yield strength of 550MPa. It is usually utilized in roll-formed sections for structural applications.
Chemical composition and physical properties of various ASTM A653 galvanized steel-grades
|Quality||Chemical Composition, Max %||Yield Strength min, Ksi||Tensile Strength min, Psi||Elongation in 2″ min, %|
|Commercial Quality (A526)||0.15||0.60||0.04||0.040||0.20||–||—|
|Lock Forming Quality(A527)||0.15||0.60||0.04||0.040||0.20||–||—|
|Drawing Quality (A528)||0.1||0.50||0.03||0.035||–||–||—|
|Drawing Quality Special Killed (A642)||0.1||0.50||0.03||0.035||–||–||—|
|Structural Quality (A 446)||Grade 33(A)||0.20||–||0.40||0.04||0.20||33||45||20|
|Grade 37 (B)||0.20||–||0.10||0.04||0.20||37||52||18|
|Grade 40 ( c)||0.25||–||0.10||0.04||0.20||40||55||16|
|Grade 50||Class 1(D)||0.40||–||0.20||0.04||0.20||50||65||12|
|Class 3 (F)||0.50||–||0.04||0.04||0.20||50||70||12|
|Grade 80 (E)||0.20||–||0.04||0.04||0.20||80||82||–|
|High Strength low-alloy (A816)||Grade 50||Type I||0.20||1.20||—||0.035||0.20||50||60||20|
|Grade 60||Type I||0.20||1.35||—||0.035||0.20||60||70||16|
|Grade 70||Type I||0.20||1.65||—||0.035||0.20||70||80||12|
|Grade 80||Type I||0.20||1.65||—||0.035||0.20||80||90||10|
Light gauge steel construction (using galvanized steel)
Principally, Light-gauge steel construction (LGS) is very similar to timber frame construction, in this case, structural steel is used as the element of the frame. The steel sections used in these applications are generally cold-formed sections (the sections are formed at room temperature), the cold-formed steel is formed by guiding thin sheets of steel through a series of rollers, where each roll should change shape slightly eventually as the resulting flat sheet is converted to C or S shaped sections.
galvanized steel is used in these applications, due to its high corrosion resistance. The thickness of the coating depends on the environment in which it is to be used. Marine environments require the highest degree of protection, while dry and arid regions could do without a little coating.
(LGS) Light gauge steel Construction
(LGS) Light gauge steel structures offer a number of advantages:
- Being lightweight, they allow rapid construction without the use of heavy tools or types of
- It is more solid than the timber frame structure.
- Their greater resistance allows a greater distance between the members of the frame.
- Therefore, it can be easily moulded into any shape; it can be coated and insulated with a wide variety of materials.
- This type of construction can be easily modified.
- They are non-combustible, a very important requirement.
We, here at DANA Steel adhere to strict standards making sure that all of our produced and supplied galvanized steel coils comply with the industrial grade-ASTM A653 SS Grade 80 / G550 galvanized coils which are then used in the construction of light gauge steel (LGS).
DANA Steel (www.danasteel.com) is an ISO 9001:2015 certified company, with the rich experience of around three decades, we have always thrived hard in order to bring revolutionary changes to the steel industry; We have our state of the art Cold Rolling Mill (CRM Complex) Situated in DIC(Dubai Industrial City) we proudly manufacture our products in Dubai, UAE.
Our market extends over a wide demographic as we export over products to around 50 countries including counties from the Indian subcontinent (Bangladesh, India, Nepal); South-East Asian countries (Indonesia, Thailand, Vietnam); Middle-East countries including members of GCC (GCC-Saudi Arabia, Oman, Bahrain, Kuwait) and Jordan. We also have our markets extended to Africa (Djibouti) and South America. With our constant commitment to customer contentment, we are able to provide competitive prices and faster shipment to all of our valuable clients.
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