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Galvanized sheetsare produced under a special technology called galvanization . This method was first randomly developed by combining two elements in the solution that had completely different electrical properties that produced electrical cell properties.
This property was first discovered by a man named Dr. Luigi Galvani, who s desked from 1737 to 17985. Dr. Luigi was not a researcher and happened to encounter this phenomenon, but after him, between 1745 and 1827, a scientist named Alsnadro Volta did a lot of research in this field and chose the name galvanic for the electrical current generated from the chemical reactions of the material.
In addition to this phenomenon, a lot of research was done on the oxidation and corrosion of iron products in order to prevent these destructive reactions in irons.
As mentioned, galvanization means immersing iron in zinc molten materials. In this condition, a layer of zinc sticks on the iron surface. Due to the difference in electroengolyte properties between iron and zinc, zinc is found and the factors that cause oxide and degradation of iron metal, fe, choose zinc instead of Fe, and iron is preserved or its corrosion is minimized .
As a result, galvanized sheets are highly resistant to corrosion .
Note that in this reaction, in addition to the galvanic properties that are created, a barrier, i.e. the thin plate of zinc, is placed between iron and open air, which has a little moisture and in itself reduces the amount of oxidation and rust of iron .
Galvanized sheets are widely used in various industries, of which there are many .
From the production of household appliances and electrical and electronics industries to large industries such as automobiles, traffic equipment and industrial buildings, all of them use a variety of galvanized sheets.
Among the most important applications of galvanized sheet are :
In many household appliances such as refrigerators, coolers, laundry, dishwashers, etc. Galvanized sheets are used. The main reason for using these sheets in sensitive devices such as freezer, refrigerator, cooler, ventilation ducts, etc. There are moist and corrosive environments that quickly destroy uncoated iron sheets .
In the electronics industry, this product is also used for all kinds of wiring, production of coating parts and ... they use.
In the automotive industry, galvanized sheets are used to produce door parts .
Galvanized sheets are used in building sandwich panels .
Silos, which are warehouses for human and animal food storage, exist in two types of concrete and metal , the metal type of which is made of galvanized sheets .
These galvanized sheets are produced with roll forming technology . The use of galvanized sheets in the manufacture of silos has many advantages, some of which are :
1.Greatly reduces costs
2.Extends silos' lifespan
3.Makes it easy to repair and replace destroyed parts
4.It is possible to create eras for temperature control and add air conditioning systems
5.Cleaning and separating silos is easier
One of the concerns of people when buying galvanized sheets is not being able to recognize these types of products. Because some profiteers may sell ordinary iron sheets that have not been galvanized at all, instead of galvanized sheets at the same price, and harm the buyer .
Therefore, everyone who is the buyer of these products should be able to recognize the originality and absence of these products. Galvanized sheets are not like opaque iron sheets and have a shiny, polished and transparent surface .
In addition, the coating ofzinc sheeton the iron surface in galvanized sheets has a thickness between 0.6 and 6 mm .
Galvanized sheets are produced in three general types of coarse, petite and flowerless flowers, each of which is used in different cases. Another feature of galvanized sheets to detect them is their lysis .
Zinc coating in galvanized sheets is generally zinc . Therefore, the chemical and physical properties of this metal can have a great impact on galvanized sheets .
The quality of the alloy used for galvanizing iron is the most important factor in determining the price of galvanized sheet.
However, both zinc and iron are excellent metals that prepare galvanized sheets for wide applications due to their high yield strength, high tensile strength, high flexibility, good hardness and suitable chemical compounds.
The width of galvanized sheets is usually between 1 and 1.25 meters like oil sheets. Also, many special designs can be implemented on galvanized sheets, one of the examples of which is the construction of sheets used in steel decks .
In fact, the excellent ductility feature of galvanized sheets has further expanded its applications.
On the other hand, depending on the application of galvanized sheet, its properties can vary completely . For example, if galvanized sheets are of great importance for a project, materials that increase this property are used.
While in some other projects the strength of galvanized sheets is more important than anything else. In the case of coating these products, it is important to note that the higher the mass or weight of the coating, the higher the quality . Because it can better protect the iron sheet from environmental conditions and oxidation .
As a result, the higher the coating of zinc materials per unit area of the steel or ferrous sheet , the greater the protection against corrosion of the sheet .
The most common sheets in the Iranian market have coatings with thicknesses between 80 and 150 microns .
These products are manufactured according to a standard called ISO1460 standard, which determines the amount of zinc per unit area of galvanized sheet .
According to this standard, the amount of zinc per unit area of the sheet is directly related to the thickness of zinc and a constant coefficient. For example, coatings no. 80 mean that there is only 80 grams of zinc per square meter of galvanized sheet.
Another important point is that in addition to the thickness of zinc coating in galvanized sheets, the compounds in this coating also have a great impact on the quality of galvanized sheets. In this regard, these products are produced in the following two types with different qualities :
1.If the coating material on the surface of the iron sheet is pure, it is called sheet Z .
2.If it is found in zinc coating material in addition to some fe element, it is called ZF sheet .
Ahan Pouya with more than a decade of best-selling experience, adheres to professional and ethical principles in the field of selling and buying at inside and outside the borders of Iran, helping you in the steel industry.
