Pre Galvanized Square Steel Pipe

Product Details

What is the difference between galvanizing and pre-galvanizing products?

1. The concepts of galvanizing and pre-galvanizing

Galvanizing is to coat iron or steel products with a layer of zinc by soaking, spraying, etc., in order to prevent iron or steel products from rusting. Pre-galvanizing is to coat a layer of zinc on the surface of steel coils when producing metal products, which can prevent corrosion and beautify the surface.

2. The difference between galvanizing and pre-galvanizing

（1）Different processing techniques

Galvanizing is a process of coating zinc on the surface of iron or steel products, while pre-galvanizing is the process of galvanizing the surface of steel coils before producing metal products.

（2） Different physical properties

The adhesion of the galvanized layer to the metal body is relatively weak, and its corrosion resistance is not as good as pre-galvanized. Pre-galvanizing uses hot-dip galvanizing. The bonding strength of the zinc layer on the surface of the steel coil is relatively large and has good corrosion resistance.

（3） Different application fields

Since the galvanized layer has weak corrosion resistance, it is generally not used in situations where long-term resistance to harsh environments is required. Pre galvanized steel pipe is widely used in the manufacturing of construction, metallurgy, shipbuilding, automobiles, electrical appliances, home appliances, and other industries due to its stronger corrosion resistance.

（4）Production costs are different

Due to differences in processing technology and physical properties, the production cost of galvanizing is relatively low. The production cost of pre-galvanized steel is relatively high, but due to its better corrosion resistance, its maintenance and replacement costs are lower in long-term use.

3. Advantages and disadvantages of galvanizing and pre-galvanizing

The advantages of galvanizing are low production cost, simple treatment process, and wide application range. However, the disadvantage is that its corrosion resistance is poor, it is easy to be worn, and it is easy to produce zinc pollution.

The advantages of pre-galvanizing are its strong corrosion resistance, smooth and beautiful surface, less maintenance, and long service life. However, the disadvantages of pre-galvanizing are high production costs, complex processing operations, and the surface being susceptible to scratches.

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