Revolutionizing Steel Technology: Exploring The Wonders of Zinc Aluminum Magnesium Alloy Coated Steel Materials

If you are looking for a product with a longer lifespan and is environmentally friendly than the galvanized product, or if you are confused about zn-al-mg steel products, this article will provide you with the answers you need.

In This Post:

1.An Introduction to Zn-Al-Mg Steel Materials

2.Neutral Salt Spray Test

3.Why Choose Zinc Aluminum Magnesium Products Instead of Galvanized Products?

As the market demand for high-quality, high-durability materials increases, zn-al-mg steel Materials has become a high-profile solution. This article focuses on the description of the product, salt spray testing and comparison with traditional galvanized products.

1.The following is an introduction to zn-al-mg steel materials:

Zinc aluminum magnesium alloy coated steel materials, also known as ZAM coating, are made through a multi-step process starting with hot rolled coils. These coils are then pickled and cold rolled before applying the Zn-Al-Mg Steel coating. The coating includes a combination of zinc, aluminum, magnesium, and other elements.

Compared to traditional zinc coatings, the zinc-aluminum-magnesium coatings have a relatively shorter market existence. However, they offer significant advantages in terms of corrosion resistance. The plane corrosion resistance of zinc-aluminum-magnesium coating materials is more than double that of ordinary hot-dip galvanized materials. Furthermore, after undergoing various molding methods, the corrosion resistance of zinc-aluminum-magnesium coating materials can be 2 to 5 times higher than that of regular hot-dip galvanized materials.

These improved corrosion resistance properties make zinc-aluminum-magnesium alloy coated steel materials highly desirable in various industries where protection against corrosion is crucial.

2.Neutral salt spray test

Neutral salt spray test (NSS test) is an accelerated corrosion test method that has been widely used in the field since its appearance. It uses 5% sodium chloride saline solution, and the pH value of the solution is adjusted in the neutral range (6-7) as a solution for spraying. The test temperature is 35°C, and the sedimentation rate of salt mist is required to be between 1 and 2ml/80cm².

NSS test 24h ⇌ 1 year in natural environment

The following are the results of two sets of neutral salt spray tests.

The first set is Baosteel’s zinc-aluminum-magnesium coil and hot-dip galvanized coil, and the second set is Yuantai’s zinc-aluminum-magnesium tube and galvanized strip tube:

First set

Baosteel’s hot-dip galvanized coil & Baosteel’s zinc-aluminum-magnesium coil, after 168 hours of neutral salt spray test.

Second set

Stock pregalvanized tubes & Stock zinc-aluminum-magnesium tube , after 24 hours of the neutral salt spray test

Stock pregalvanized tubes surface rating: Grade 1: Defect area accounts for 35%~45%, appearance grade I (cracks), and the sample shows matrix metal corrosion.

Surface rating of stock zinc-aluminum-magnesium tube of Yuantai Derun Group: Grade 8: defect area accounts for 0.15%~0.2%, appearance grade B (almost no darkening caused by corrosion of the covering layer), and the surface of the sample has slight discoloration;

Stock pregalvanized tubes & Stock zinc-aluminum-magnesium tube , after 48 hours of the neutral salt spray test

Stock pregalvanized tubes & Stock zinc-aluminum-magnesium tube, after 10 days of the neutral salt spray test

3.Why choose zinc aluminum magnesium coasted steel products instead of galvanized products?

There are several reasons why one might choose zn-al-mg steel products over galvanized products:

1. Enhanced corrosion resistance: zn-al-mg steel coatings provide superior corrosion protection compared to galvanized coatings. The addition of magnesium in the zn-al-mg steel coating helps enhance its resistance to saltwater and atmospheric corrosion, making it ideal for applications in marine environments or areas with high levels of pollution.

2. Longer lifespan: Due to its higher corrosion resistance, zn-al-mg steel products typically have a longer lifespan than galvanized products. This can result in cost savings over time, as less maintenance and replacement will be required.

3. Improved durability: zn-al-mg steel products offer increased durability and resistance to scratches, abrasion, and UV radiation. This makes them suitable for applications where the steel is exposed to harsh conditions or frequent handling.

4. Higher heat resistance: zn-al-mg steel coatings can withstand higher temperatures compared to galvanized coatings. This makes them more suitable for applications involving high-temperature exposure, such as exhaust systems or industrial ovens.

5. Aesthetics: zn-al-mg steel coatings often have a smoother and more consistent appearance compared to galvanized coatings, providing a more aesthetically pleasing finish for architectural or decorative applications.

It's important to note that the suitability of zn-al-mg steel products vs. galvanized products depends on the specific application requirements, budget, and environmental conditions. Consulting with zn-al-mg steel supplier or industry expert can help determine the most appropriate coating option for your specific needs.

Zn-Al-Mg Steel Materials, as a material with excellent performance and durability, not only surpasses traditional galvanized products in corrosion resistance, but also has significant advantages in quality, processability and cost-effectiveness. Advantage. Whether in construction, traffic engineering or other industrial sectors, it provides its customers with long-lasting and cost-effective solutions.