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What is galvanizing and how does it improve metal parts?

Galvanizing is the process of adding a zinc coating to the surface of steel or iron. Since zinc acts as a sacrificial coating, it protects the underlying steel or iron, thus extending the life of metal components

But galvanizing is a complex process that can be done in a number of ways. Different forms of galvanizing exist, including hot-dip galvanizing and hot-diffusion galvanizing, and these variations each have their own unique advantages and disadvantages. Therefore, it is helpful to understand the different forms of galvanizing before incorporating it into a prototyping or manufacturing project

Galvanized metal is more common than you might think. Structures such as building frames, metal benches, balconies, ladders and fire escapes can all be made from galvanized metal to ensure longer life and adequate corrosion and damage protection. Other examples can be found in auto parts and appliances

Galvanized material

The main substrates that can be galvanized are steel and iron. However, other ferrous metals can also be galvanized

The coating material in galvanizing is always zinc. However, a similar process to galvanizing is tinning, which replaces tin with zinc. Tin plating is suitable for simple applications such as food storage, but is not as reliable as galvanizing: if the coating is damaged, the tin will attack the iron underneath

Manufactured from galvanized metal

Galvanized material can be widely used as galvanized metal sheet for sheet metal manufacturing processes such as bending and stamping, or galvanized metal bars, tubes and bars for processes such as CNC machining

Galvanized materials tend to be easier to machine because the zinc coating is softer than the underlying steel

Galvanized metal can also be welded, but zinc emits dangerous fumes, so proper ventilation is critical. Painting is not particularly effective on galvanized steel or iron unless the material is galvanized

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