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What is the function of galvanizing?

November 24, 2023

What is the function of galvanizing?

Galvanizing is a surface treatment method that covers the metal surface with a zinc layer, usually applied to steel. The functions of galvanizing mainly include the following aspects:

 

Anti-corrosion: Zinc has high corrosion resistance, so galvanizing can effectively prevent the underlying metal (usually steel) from rusting. This is important for metal structures used outdoors, exposed to moisture or corrosive environments, such as buildings, pipes, bridges, etc.

Anti-oxidation: Zinc forms a dense oxide layer in the atmosphere and plays an antioxidant role. This oxide layer can block oxygen and moisture in the air and slow down the oxidation rate of the metal.

Aesthetics: The surface of galvanized steel usually appears silver-white or blue-white, with good luster, giving the metal a good appearance. This is very important for some applications that require a better appearance (such as building materials).

Maintenance: The galvanized layer can provide certain physical protection and slow down the speed of scratches, abrasion and other mechanical damage to the metal surface, thus extending the service life of the material.

Solderability: Galvanized metal surfaces have good solderability for welding, which makes galvanized materials easier to handle during manufacturing and repair processes.

It is important to note that while galvanizing provides some protection against corrosion, the zinc layer may become lost over time, especially in severely corrosive or high-temperature environments. Therefore, in environments with special requirements, other more corrosion-resistant coatings or materials may need to be considered.

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