Hot Dip Zinc Coated Steel Sheet

What is hot dip zinc coated steel sheet ?

 

Hot-dip galvanized steel panels, called galvanized steel panels, are steel panels that are coated with a layer of zinc through a hot-dip plating process. The process involves immersing steel sheets or coils in a bath of molten zinc, which creates a zinc-iron alloy layer on the surface of the steel.

Hot-dip galvanized steel is used in a wide variety of industries and applications, including construction, automotive manufacturing, appliances, and industrial equipment. It is favored for its excellent corrosion resistance, durability and relatively low cost compared to other corrosion protection methods. Additionally, galvanized steel can be further processed, such as painted or coated with additional protective layers, to enhance its performance and appearance for specific applications.

 

 

hot dip zinc-coated steel sheet specification

Product Name	hot dip zinc-coated steel sheet
Zinc coating	Z60-z275g/m2; AZ60-275g/m2
Warranty	15 years
Types of coating	hot dipped galvanized /prepainted /Galvalume
Thickness	0.1mm-2.5mm(0.14-1.5 mm is the most advantage thickness)
Color	Color according to RAl standard (including 210 colors) or Different Patterns (including 3D Wood imitation ,Marble ,Hairline, Brick ,Camouflage series ,Cloth ,Flowers and Plants,etc)
Film	Lacquer Coating thickness Top surface is 15-25 microns and the back is 5-7microns or according to customer needs
Painting Type	PE, HDP, SMP, PVDF, EC
Certificate	SGS.SNAS
Weight Per Pallet	About 3Ton
Standard	JIS G3302, JIS G3313 ,GB/T2518-88, gb11523-89,ASTM A1008-2000,EN10169 ETC
Test Range	Color coating adhesive force test,Zinc coating quailty and thickness test,Tensile and yield strength test and Hardness test
Payment term	TT,L/C at sight
MOQ	3 Ton(1*20GP FCL)
Width	688/750/820/850/900/915 (request)
Material	SGCC, SGCH

FAQ:

Sure, here are five questions about Hot Dip Zinc Coated Steel Sheet:

1. What is the process involved in hot-dip zinc coating of steel sheets?

 

The hot-dip zinc coating process for steel sheets involves several steps:

1. Surface Preparation:The steel sheet is cleaned to remove any oil, grease, or other contaminants from its surface. This step ensures proper adhesion of the zinc coating.

2. Fluxing: The cleaned steel sheet is then passed through a flux solution, which removes any remaining oxides from the surface and helps promote the bonding of the zinc coating.

3. Galvanizing Bath: The prepared steel sheet is immersed in a bath of molten zinc at temperatures typically between 430°C to 460°C (800°F to 860°F). The zinc bath may contain additives to control the thickness and appearance of the coating.

4. Formation of Zinc Alloy Layers: When the steel sheet enters the zinc bath, a metallurgical reaction occurs between the steel and the molten zinc, resulting in the formation of zinc-iron alloy layers. These alloy layers provide excellent corrosion protection to the steel substrate.

5. Cooling and Solidification: After the steel sheet is withdrawn from the zinc bath, it undergoes a controlled cooling process to solidify the zinc coating. This ensures uniform thickness and adherence of the coating to the steel surface.

6. Finishing: Once cooled, the zinc-coated steel sheet may undergo additional finishing processes, such as skin passing or tension leveling, to improve its surface quality and flatness.

Overall, the hot-dip zinc coating process creates a durable and corrosion-resistant layer on steel sheets, making them suitable for a wide range of applications in construction, automotive, appliances, and other industries.

2. What are the main advantages of using hot-dip zinc coated steel sheets in construction and manufacturing?

Corrosion Resistance: The zinc coating provides excellent protection against corrosion, even in harsh environments exposed to moisture, chemicals, and salt spray. This resistance to corrosion helps extend the lifespan of structures and manufactured products.

Durability: Zinc-coated steel sheets have enhanced durability, making them less susceptible to damage from abrasion, impact, and weathering. This durability ensures long-term structural integrity and reduces maintenance requirements.

Formability: Hot-dip zinc coated steel sheets are highly formable, allowing for easy fabrication into various shapes and sizes without compromising the integrity of the coating. This versatility makes them suitable for a wide range of construction and manufacturing applications.

Aesthetic Appeal: Zinc-coated steel sheets can be produced with a smooth, uniform finish that enhances their visual appearance. They are available in a variety of colors and surface textures, offering designers and architects flexibility in achieving desired aesthetics.

Cost-effectiveness: Despite their superior performance, hot-dip zinc coated steel sheets are cost-effective compared to alternative materials with similar corrosion resistance. They offer a balance between performance and affordability, making them a preferred choice for many construction and manufacturing projects.

Recyclability: Zinc-coated steel sheets are fully recyclable at the end of their service life, making them an environmentally sustainable choice. The zinc coating can be easily reclaimed and reused in the production of new steel products, reducing the demand for virgin materials and minimizing waste.

Overall, the main advantages of using hot-dip zinc coated steel sheets in construction and manufacturing include corrosion resistance, durability, formability, aesthetic appeal, cost-effectiveness, and recyclability, making them a preferred material for various applications.

 

3. How does the thickness of the zinc coating affect the performance and longevity of the steel sheet?

 

The thickness of the zinc coating significantly influences the performance and longevity of the steel sheet in several ways:

1. Corrosion Resistance:

Thicker zinc coatings provide a greater barrier against corrosive elements such as moisture, chemicals, and salt spray. A thicker coating effectively shields the steel substrate from these corrosive agents, thereby enhancing its resistance to corrosion and extending its lifespan.

2. Durability:

A thicker zinc coating adds an extra layer of protection to the steel sheet, making it more durable and resistant to damage from abrasion, impact, and weathering. This increased durability ensures that the steel sheet maintains its structural integrity over a longer period, reducing the need for frequent repairs or replacements.

3. Environmental Conditions:

In harsh environments with high levels of humidity, pollution, or exposure to corrosive substances, a thicker zinc coating provides better defense against corrosion. Steel sheets with thicker coatings are therefore better suited for use in such challenging conditions, ensuring reliable performance and longevity.

4. Coating Uniformity:

Maintaining uniformity in the thickness of the zinc coating across the entire surface of the steel sheet is crucial for optimal performance. Thicker coatings help mitigate variations in coating thickness, reducing the likelihood of localized corrosion and ensuring consistent protection for the entire steel substrate.

5. Galvanic Protection:

Zinc coatings act as sacrificial anodes, protecting the underlying steel substrate through galvanic corrosion. Thicker coatings offer a larger reservoir of sacrificial zinc, which prolongs the protection provided to the steel sheet, especially in areas where the coating may be damaged or compromised.

6. Application Specifics:

The required thickness of the zinc coating depends on the specific application and the level of corrosion protection needed. While thicker coatings generally offer better performance and longevity, they may not always be necessary or cost-effective for certain applications with lower exposure to corrosive elements.

In summary, the thickness of the zinc coating directly affects the performance and longevity of the steel sheet by influencing its corrosion resistance, durability, protection in harsh environments, coating uniformity, galvanic protection, and suitability for specific applications. Thicker coatings generally offer superior performance and longer lifespan, but the optimal thickness should be determined based on the intended use and environmental conditions.