Galvanized coil, the main raw material is zinc alloy, and its production process is continuous galvanization.
Galvanized coil, it has many classifications and models, we mainly according to its performance will be classified. We generally use numbers to indicate. Galvanized coil, which is still very popular today, has the advantage of good adhesion and weldability.
Again, there is no such thing as a galvanized coil without its drawbacks. Its shortcomings are exposed steel, inclusions, mechanical damage, etc., and lead to the emergence of this situation is mainly due to the role of surface oxidation.
Galvanized steel coil importers produce galvanized steel by two main processes:continuous hot-dip galvanizing and electro-galvanizing.
The hot-dip process consists of passing the steel through a molten zinc bath, and the electro-galvanizing process consists of applying zinc through an electrolytic treatment. As a result, the zinc layer is firmly adhered to the base material by means of an iron-zinc bonding layer. Our hot-dip galvanized products are manufactured to specification and our electro-galvanized products are manufactured to specification.
Galvanizing is one of the most effective and economical ways to protect bare steel from corrosive environments. Not only does zinc act as a barrier between the steel and the environment, but it sacrifices itself in order to protect the steel sheet below. Sacrificial or galvanic protection occurs when two different metals come into contact and combine with water and oxygen. Zinc preferentially corrodes the iron in the steel. This protection prevents the steel from corroding in areas not covered by zinc. As a result, the spread of corrosion from cutting edges, drilled holes, etc. is minimized.
How it is made
In the hot-dip galvanizing process, carbon steel coils are immersed in an acid bath to remove steel scale. Once the steel is cleaned and the scale removed, it is continuously dipped into a bath of molten zinc to form a metallurgically bonded and protective coating that controls the weight of the coating. The weight of the coating increases the corrosion resistance of the steel.
The zinc bath in the hot-dip galvanizing process contains trace elements such as aluminum. The presence of these traces optimizes the adhesion of the coating and improves the ductility of galvanized steel, galvanized steel coils, and galvanized steel slit coils, forming the material into the hundreds of products we use every day.
In previous generations of steelmaking, galvanized steel coils were used to include large, flower-like patterns of zinc crystals on the surface of the steel, called "sequins". Bright flakes resemble large hexagonal snowflakes. While today's galvanized steel still contains flakes, modern steel mills produce galvanized steel with flakes that are barely noticeable to the naked eye. This is known as minimally banded and zero-banded galvanized steel.
