◆ Galvanized vs Galvalume
The difference between galvanized steel sheet and galvalume steel sheet is mainly the difference in coating.
A layer of zinc material is evenly distributed on the surface of the galvanized steel sheet, which acts as an anodic protection for the base material, that is to say, the alternative corrosion of the zinc material protects the use of the base material, and only when the zinc is completely corroded can it damage the inside base material.
The surface coating of the galvalume steel sheet is composed of 55% aluminum, 43.5% zinc and a small amount of other elements. Microscopically, the surface of the galvalume coating is a honeycomb structure, and the "honeycomb" composed of aluminum contains zinc.
In this case, although the galvalume coating also plays the role of anodic protection, on the one hand, due to the reduction of zinc content, on the other hand, the effect of anodic protection is greatly reduced because the zinc material is wrapped in aluminum and is not easy to be electrolyzed.
Therefore, once the galvalume steel sheet is cut, it will rust soon when the cut edge basically loses its protection, so the galvalume sheet should be cut as little as possible. Once cut, anti-rust paint or zinc-rich paint should be used to protect the edges to prolong the service life of the galvalume steel sheet.
Characteristics of galvalume steel sheet:
The heat reflectance of galvalume steel sheet is very high, which is twice that of galvanized steel sheet, and people often use it as a heat insulation material.
Galvalume steel sheet has good heat resistance and can withstand high temperatures of more than 300 degrees Celsius. It is similar to the high-temperature oxidation resistance of aluminized steel plate. It is often used in chimney pipes, ovens, illuminators and fluorescent lampshades.
The corrosion resistance of galvalume steel sheet is mainly due to the protective function of aluminum. When the zinc is worn away, the aluminum forms a dense layer of aluminum oxide, which prevents the corrosive medium from further corroding the interior.
Because the density of 55% AL-Zn is smaller than that of Zn, under the same weight and the same coating thickness, the area of galvalume steel sheet is more than 3% larger than that of galvanized steel sheet.
Easy to paint
It has excellent adhesion between galvalume steel sheet and paint, and can be painted without pretreatment and weathering.
The galvalume steel sheet has a silver-white gorgeous surface.
The galvalume steel sheet has similar processing performance and spraying performance to the galvanized steel sheet.
Galvalume steel's unique protective characteristics and economical price point make it ideal for:
Construction: roofs, walls, garages, sound insulation walls, pipes and prefabricated houses, etc.;
Automobile: mufflers, exhaust pipes, wiper accessories, fuel tanks, truck boxes, etc.;
Home appliances: refrigerator back panel, gas stove, air conditioner, electronic microwave oven, LCD frame, CRT explosion-proof belt, LED backlight, electrical cabinet, etc.;
Agricultural use: Pig houses, chicken houses, granaries, greenhouse pipes, etc.;
Others: heat insulation cover, heat exchanger, dryer, water heater, etc.
◆ Purchasing Information
|Galvalume Steel Sheet Plate|
Material Thickness ||0.15-1.35 |
Max Coil ||
45,000 lbs |
Entry Width ||
Exit Width ||
Width/Length Tol ||±0.10 |
Exit width ||
Max coil weight ||
50,000 lbs |
|Package||standard export package|
Country of origin
Supplier and manufacturer
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Q:Can you send samples?
A:Sample can be for free,freight cost collect.
Q:What product information do I need to provide?
A:Steel grade/thickness/width/quantity,these will decide the price.
Q:About product prices?
A:Prices vary from period to period due to cyclical changes in the price of raw materials.
Q:What are the certifications for your products?
A:We have ISO 9001,CE,SGS,BV and other certifications.
Q:How about the delivery time?
A:Regularly the delivery time around 10-15 days,customized one will inform the delivery time ahead.
Q:Does the product have quality inspection before loading?
A:All the products are strictly tested before packaging,also can inspect by third party inspection.
Q:How to pack the products?
A:Standard export package with waterproof film and wooden pallet.It can effectively protect products from corrosion.