When choosing suitable roofing materials, galvanized corrugated sheets are highly favored for their durability and versatility. Jindalai Steel Group Co., Ltd. offers a variety of options, including electro-galvanized corrugated sheets, hot-dip galvanized corrugated sheets, aluminized zinc corrugated sheets, galvanized aluminum-magnesium alloy corrugated sheets, and color-coated galvanized corrugated sheets. Each type of corrugated sheet has its unique properties, making it crucial to understand their differences and applications.

The core difference between hot-dip galvanized corrugated sheets and electro-galvanized corrugated sheets

 The main difference between hot-dip galvanized and electro-galvanized corrugated sheets lies in their coating processes. Hot-dip galvanizing involves immersing the steel sheet in molten zinc, resulting in a thicker, stronger coating with superior corrosion resistance. This method is ideal for use in harsh environments, such as coastal or high-humidity areas, where moisture and salt accelerate corrosion.

 On the other hand, electro-galvanized corrugated sheet is produced by electrochemically coating a layer of zinc onto the surface of the sheet. This process creates a thinner zinc layer, making it suitable for indoor applications or environments with low corrosiveness. While electro-galvanized sheet is less expensive, its protective performance may not be as good as that of hot-dip galvanized sheet.

How ​​to Choose the Right Galvanized Corrugated Sheet for Coastal/High-Humidity Environments

 For coastal or high-humidity environments, hot-dip galvanized corrugated sheets are recommended. Their thicker zinc layer effectively prevents rust and corrosion, ensuring a long service life and durability. Alternatively, galvanized aluminum-magnesium alloy corrugated sheets can also be considered, as they offer excellent corrosion resistance while maintaining a lightweight design.

Determination of Zinc Coating Adhesion

 To quickly assess the adhesion of the zinc coating on galvanized corrugated sheets, a simple test can be performed. The “scratch test” involves using a sharp blade to create a grid pattern on the coating surface. After applying tape to the grid, peeling it off allows you to observe the adhesion between the zinc layer and the substrate. If the zinc layer remains intact, the adhesion is good; otherwise, it may indicate a quality problem.

Prevent white rust from forming during storage

 White rust is a common problem with galvanized steel sheets, usually caused by moisture buildup during storage. To prevent white rust, galvanized corrugated sheets must be stored in a dry, well-ventilated place. Using moisture-absorbing materials, such as silica gel desiccants, can also help reduce humidity. Furthermore, avoiding overcrowding the sheets promotes air circulation and reduces the risk of white rust formation.

Common Roof Thicknesses and Wave Heights

 Galvanized corrugated sheets are available in a variety of thicknesses and wave heights to meet different roofing needs. Common thicknesses range from 0.3 mm to 1.2 mm, and wave heights typically range from 18 mm to 76 mm. The choice of thickness and wave height depends on a number of factors, such as intended use, load-bearing requirements, and aesthetic preferences.

 In short, choosing the right galvanized corrugated sheet is crucial to ensuring the durability and performance of roofing projects. Jindalai Steel Group Co., Ltd. is committed to providing customized, high-quality products to meet your specific needs. Whether you choose hot-dip galvanizing, electro-galvanizing, or any other type, our team of experts will be happy to guide you and help you make the best choice for your application requirements.