What Does Galvanized Coating Mean?
Galvanizing coating is the use of zinc coating to prevent rust or corrosion in steel or iron structures. The use of zinc on steel structures is a process called "Galvanizing coating". This process was first discovered and developed in France and England in 1837, in which a sheet of iron or steel was cooled by immersion in a molten zinc bath (a method called "hot-deep Galvanizing coating").
Protexion Explains Galvanized Coating
The most common method of applying Galvanizing coating is hot-dip galvanization; However, there are many other processes that are also used, such as:
Zinc Electroplating - In this method the steel sheet is immersed in the zinc ion solution and an electric current flows through it, causing the zinc ion solution to spread evenly over the metal sheet.
Mechanical plating - In this method, zinc powder with glass beads. And special reducing agents are applied to the metal sheet, which bind zinc particles to the surface of the sheet.
Sherdizing - In this method, the metal sheet is heated to a temperature of 752 ° F (400 ° C) and passed through zinc powder. At these high temperatures, diffusion occurs in the molecules of zinc and steel.
Continuous strip Galvanizing coating and galvanized wire - In this method, controlled air pumping passes through a metal strip or metal wire through a solution of molten zinc at a speed of 590 feet (180 meters) per minute. It applies a zinc coat to a sheet of metal.
Zinc Metal Spray - In this method, the metal sheet is cleaned up to class III level and then sprayed with zinc powder with the help of plasma flame gun.
Galvanization is a useful process because steel is usually severely damaged when it comes in contact with the environment without proper treatment. In comparison, zinc is significantly more resistant to rust and the electrochemical redox reactions required for rust formation. Therefore, zinc is mixed with iron to form cathodic protection. Some of the major advantages of galvanization are metal life, low cost and increased reliability of the coating.
There are several techniques available for applying zinc coatings and each will determine the thickness of the coating and its final durability in specific environments.
The most widely used types of zinc coatings are:
Mechanical plating
Zinc electroplating
Sherardizing
Continuously galvanized wire
Continuously galvanized sheet
Zinc metal spraying
Galvanized tube and pipe
General or hot-dip Galvanizing coating
A brief description of each application process and the properties of the coating developed are given in the following sections.
Zinc Electroplating
In zinc electroplating, the coating material is immersed in a solution containing zinc ions and an electric current is applied to cover the surface evenly.
Mechanical Plating
In mechanical plating, the coating material is coated in zinc powder with special reducing agents and glass beads that attach zinc particles to the steel surface.
Sherardizing
In sherding, the objects to be coated in zinc powder are heated to a temperature of about 400 C upon which zinc is bonded to the diffusion steel.
Continuous Strip Galvanizing coating
In continuous strip Galvanizing coating, the coil steel passes through a bath of molten zinc at a high speed (180 m / min) in a controlled lowering environment.
Continuously Galvanized Wire
The cleaned steel wire is passed through a lead / zinc bath at high speed (180 m / min) to form a continuous galvanized wire.
Galvanized Pipe and Tube
Galvanized tubes and pipes are made by two techniques. It is semi-continuous where the stock length of the tube is sterilized and continuously passed through a molten zinc bath at a temperature of 450C. The second technique is continuous where the strip is developed from a coil into a tube and then 450 sec through a zinc bath melted in the tube. Goes to temperature. The second technique covers only the outer part of the tube.
Galvanizing coating can protect metal in many ways. It creates protective coating shields that protect metal from adjoining environments. Then a layer of zinc paint prevents water and humidity in the air from corroding the steel. Should the zinc coating be smashed deep enough, metal would become susceptible to corrosion.
As a leading manufacturer and supplier of galvanizing coating and zinc rich coating and paint, Protexion can help you to find your product and provide you information about that product. Contact us today to learn more about.
Galvanizing coating is the method of applying to steel or iron a protective zinc coating to prevent rusting. This paint is used mainly for galvanized metal. Protexion is an India’s leading supplier of galvanizing coating and paint designed for use on all types of metal, to provide protection against corrosion, and various other problems.
More about information for galvanizing coating then Visit our site : - http://www.protexion.in/cold-galvanizing-coating.php
Comments
Post a Comment