What Are The High Quality Of Galvanized Coils?

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Galvanized Steel Coil

The quality of galvanized coils depends on the specifications, dimensions, surface, galvanizing, chemical composition, plate shape, machine function and packaging. Some points are shared by professional Galvanized Steel Coil Factory below.

1. Packaging

It is divided into two types: cut into fixed length galvanized sheets and rolled galvanized sheets. In general, the iron packaging is lined with moisture-proof paper, which is tied with an iron waist to prevent the galvanized sheets inside from rubbing against each other.

2. Specifications and dimensions

The relevant galvanized coil size specifies the specified thickness, length and width of the galvanized sheet. The width and length of the galvanized coil and the width of the volume can also be determined according to the requirements of the user.

3. Surface

Overview: Galvanized sheets have different profiles due to different treatment methods during the coating process, such as general zinc flower, fine zinc flower, flat zinc flower, zinc-free flower and phosphating treatment. Galvanized sheets and galvanized coils that are cut to a fixed length must not have defects that affect the use, but the rolled sheets allow for welded parts and the like.

4. Zinc plating amount

Galvanizing scale value: Galvanizing is a widely used method for indicating the thickness of the zinc layer of a galvanized sheet. There are two types of galvanizing: the same amount of galvanizing on both sides (ie equal thickness) and the difference in galvanizing on both sides (ie different thickness). The unit of galvanizing is g/m2.

5. Machine function

(1) Tensile test: Generally, as long as the galvanized sheets used for layout, stretching and deep drawing have tensile function requirements.

(2) Bending experiment: Measuring the process performance of the sheet is an important name. However, the requirements for various galvanized sheets are actually different. Generally, the galvanized sheet is required to be bent by 180 degrees, and the outer layer must not be left with a zinc layer, and the plate base must not be cracked or broken.

6. Chemical composition

Different countries have different requirements for the chemical composition of galvanized substrates.

7. Shape

There are two goals for measuring black and white shapes, namely straightness and sickle. The flatness of the steel plate and the upper limit of the radius of the file must be defined.

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