Hot-dip galvanized steel, with excellent anti-corrosion properties, and the emergence of hot-dip galvanizing technology have greatly extended the service life of steel. Whether for construction, bridges, ships, power, communication, or transportation, especially where high anti-corrosion performance is required, such as marine engineering, chemical equipment, and other fields, hot-dip galvanized steel has always been the material of choice.
The hot-dip galvanizing process improves the adhesion and uniformity of the zinc layer and reduces the cost, making it increasingly competitive. This article takes you through the many facets of galvanized steel. It includes its uses, benefits, properties, definitions, whether it is rustproof, process, and coating.
Galvanizing is a method of preventing rust by coating the surface of steel with metallic zinc. Hot-dip galvanizing is a method of galvanizing that consists of three parts: pre-treatment, hot-dip galvanizing, and post-treatment. It is an effective method of metal corrosion prevention. It dips the descaled steel parts into the molten zinc liquid at about 500℃, so that a zinc layer is attached to the surface of the steel parts to achieve the purpose of anti-corrosion. Hot-dip galvanizing has the advantages of uniform coating, strong adhesion and long service life.
-Suburban environments: Standard hot-dip galvanizing rustproof thickness lasts for more than 50 years without maintenance.
-Urban or offshore areas: Standard hot-dip galvanized rust-proof thickness lasts for 20 years without repair.
As the name suggests, it is steel and belongs to steel. Hot-dip galvanized steel is made by continuous hot-dip plating of hot-rolled steel strip and cold-rolled steel strip.
Yes, it can be hot-dip galvanized. Aluminum that has been galvanized is hot-dip galvanized aluminum. However, pure aluminum is not suitable for hot-dip galvanizing, but aluminum alloys can be hot-dip galvanized under certain conditions. Materials that can be galvanized in daily life include iron, steel, aluminum, and copper. Iron and steel are common galvanizing materials with ideal galvanizing results. Other materials are recommended to use other rust prevention methods.
In summary, iron, steel, and copper can be galvanized by appropriate pretreatment, and aluminum can be galvanized by special treatment.
Hot-dip galvanized steel plays an important role in many fields with its excellent anti-corrosion properties, decorative properties, processing properties, and electrical conductivity. It is widely used in construction, home appliances, automobile, machinery, electronics and other industries. The following are its main characteristics:
These are the advantages of hot-dip galvanized steel sheet. Although hot-dip galvanized steel sheet has many advantages, you must also pay attention to maintenance and choose the right specifications according to the specific requirements.
There are some differences between the two in terms of process, effect, application, etc., as follows:
The galvanizing process of hot-dip galvanizing consists of three main parts: pre-treatment, hot-dip galvanizing and post-treatment.
The surface treatment methods of hot-dip galvanizing and spray painting are different, so the effects are different in many aspects.
The thickness standard of hot-dip galvanizing is related to the thickness of the plated parts.
Thickness of plated parts | Hot-dip galvanizing average thickness | Hot-dip galvanizing local thickness |
≥6mm | >85μm | >70μm |
3-6mm | >70μm | >55μm |
1.5-3mm | >55μm | >45μm |
According to the national standard《GB/T 13912-2002 Technical Requirements for Metal Covering and Steel Coatings》, the thickness of the galvanized layer of hot-dip galvanized steel pipes must be above 35 μm. In practical applications, the thickness of hot-dip galvanizing steel products is generally above 45 μm, and can even reach 200 μm.
Note that the thickness of hot-dip galvanizing is not as thick as possible. An excessively thick zinc layer may affect its service life.
Hot-dip galvanized steel can last 20 to 50 years without rusting. The specific service life is related to the actual environment, zinc layer thickness, use, zinc layer quality, etc.
Hot-dip galvanizing provides protection against rust. Hot-dip galvanizing is a process in which the surface of steel is immersed in molten zinc to form a zinc layer with a thickness of 10 to 25um. This zinc layer prevents steel from corroding and acts as a good rust inhibitor. If the zinc layer is damaged, it can cause the steel to rust. So pay attention to maintenance.
There is also electro-galvanizing, also called cold galvanizing, which does not require high-temperature treatment. After pretreatment, electrolysis is mainly used. The electroplated part serves as the cathode and the zinc solution serves as the anode. After energization, the zinc ions in the galvanizing solution move toward the cathode under the action of potential difference, forming a uniform zinc layer.
The answer is yes. It can be welded. Generally, electric welding or gas shielded welding can be used for thinner zinc layers, and argon arc welding with electrodes is recommended for thicker zinc layers. Gas shielded welding is mainly used for welding that is inconvenient to grind and has a zinc layer.
It can be tinted and painted. The color can be set according to the RAL color card. The finished product after processing is the color board. Specifically, special coatings and water-based coatings can be used to form color-coated galvanized steel panels. Both coatings can be used for surface coatings on stainless steel, aluminum alloys, galvanized sheets, galvanized steel sheets, non-ferrous metals, etc. It has good adhesion and can reach level 0 standard. It can adhere well to the substrate and the paint film will not peel or fall off.
Galvanizing is a popular manufacturing method, mainly divided into hot dip galvanizing and cold galvanizing, cold galvanizing is also called electro galvanizing, electro galvanizing is also divided into acid plating and alkalinity, WanZhi uses the hot dip galvanizing process, which is the method of hot dipping.
Hot Dipped Galvanized Steel involves placing iron into molten zinc, which causes a layer of zinc to adhere to the surface of the plated part. It is used to protect 80% of the world’s manufacturing industry against rust. Galvanization optimizes the performance of the plated parts and greatly improves the durability of WANGI products, and the Hot Dipped Galvanisation process is the most commonly used method of galvanization.
If you have a project in hand that requires this material, come and visit our production line, galvanized coils and sheets for sale!
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