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Galvanized Steel Definition, Types, Applications

Definition of Steel Galvanization

Steel galvanization is a manufacturing process that coats steel or iron with zinc to protect it from rusting and corroding.

The most common type of galvanization is called hot-dip galvanizing, where the steel is dipped in a bath of molten zinc. This process creates a barrier between the steel and any corrosive elements, as well as a sacrificial layer of zinc that will corrode instead of the steel. As a result, galvanized steel is more durable and resistant to corrosion than uncoated steel. It is also one of the most popular types of steel because of its many benefits.

There are also other galvanization methods, according to your final product working environment, Thrive metal products could provide different working ways.

Galvanization Methods and Ways

Hot-dip galvanizing

Hot-dip galvanizing(HDG) is a common galvanizing method in which the iron or steel is completely immersed in molten zinc.

The advantage of hot-dip galvanizing is its relatively low cost compared to other galvanizing methods.

Chemical reactions during galvanizing occur only on clean iron or steel surfaces, so before hot dipping, the steel material must be degreased and pickled to ensure the quality of the final product.

After that, the iron and steel materials are dipped into molten zinc solution, and a series of complex chemical reactions take place between iron and zinc to produce iron-zinc metal compounds.

The thickness of the zinc layer is 6 to 20 microns, which is relatively thick and usually consists of pure zinc layers and alloy layers. The process after hot dip is completed includes cooling, passivation, testing, etc.

Electrically Galvanizing

Electro galvanizing (EG) is a type of galvanizing that coats iron or steel with a thin layer of zinc.

The production line for electro galvanizing is expensive, but the result is a more uniform zinc layer than with hot-dip galvanizing.

In electro galvanizing, the iron or steel to be galvanized acts as the cathode, while the zinc to be plated is the anode. The zinc salt solution is used as the electrolyte, and the thickness of the zinc layer is about 7 microns.

Cold Galvanizing

Cold galvanizing is the application of zinc-containing paint to the surface of steel materials. This process requires only the equipment used for ordinary painting, but the durability and life of the zinc coating (referred to as a zinc-rich coating) are poor and it is not suitable for steel. The material also provides less sacrificial protection.

Applications of Galvanized Steel

Galvanized steel is a versatile material that has a variety of industrial and commercial applications. It is used in road construction, rail infrastructure, energy production, oil and gas refining, agriculture, water and waste management, and a range of other settings. Its properties make it an ideal choice for these applications, where durability and resistance to corrosion are essential.

One of the most common uses for galvanized steel is in the construction of roads and bridges. Steel is used for a variety of purposes in this industry, including:
reinforcing concrete structures
constructing girders and beams, and creating supports for signs and traffic lights.
Its durability and strength make it an ideal choice for these applications.

Galvanized steel is also widely used in the rail industry. It is used to construct railway tracks, signals, and supports. Its resistance to wear and tear makes it an ideal material for this purpose.

The energy sector also relies heavily on galvanized steel. It is used in the construction of power plants, oil refineries, and gas pipelines. Its ability to withstand high temperatures and pressures makes it an ideal choice for these applications.

The agriculture industry makes use of galvanized steel in a number of ways. It is used to construct farm buildings, fences, and irrigation systems. Its durability and resistance to corrosion make it an ideal material for these purposes.

Water and waste management is another area where galvanized steel is widely used. It is used in the construction of sewage treatment plants, water tanks, saltwater environment products, boat trailers, and piping systems. Its ability to resist corrosion makes it an ideal choice for these applications.

Galvanized steel is also used in a variety of sports and leisure settings. It is used in the construction of playground equipment, basketball hoops, and football goalposts. Its resistance to weathering makes it an ideal choice for these applications.

As you can see, galvanized steel is a versatile material with a wide range of uses. Its durability, strength, and resistance to corrosion make it an ideal choice for a variety of industrial and commercial applications.

Properties of Galvanized Steel

Galvanized steel is a type of steel that has been coated with zinc. The main benefit of galvanized steel is that it is corrosion-resistant. It also has below property advantages:

  1. Galvanized steel is also weather-resistant and can withstand extreme temperatures.
  2. Galvanized steel is often used for roofing, siding, and trim because of its durability.
  3. Galvanized steel is also used in the manufacture of pipes, nails, and screws.
  4. Galvanized steel can be recycled and is a sustainable material.