Galvanization Chemical:

What is Chemical Galvanization?

Galvanization is a process of coating steel or iron with zinc in order to deliver excellent protection against corrosion of the steel or iron base. In 1837, the process of galvanizing sheet iron was developed at the same time in England and France country. Both of these methods are working a "Hot-Dip Galvanization" process to coat sheet iron with zinc.

There are very common methods for applying protective coatings of zinc to steel and iron which are following below.

  1. Hot-dip Galvanization: The involvement of steel or iron in molten zinc, after the surface of the base steel has been properly cleaned.
    1. Hot-dip galvanizing process yields a quite thick covering of zinc that freezes into a crystalline surface pattern also called spangles.
    2. During the process of galvanic, a multiple layered structure of steel-zinc or iron alloys is made between the internal surface of the zinc coating and the iron steel. These middle layers tend to be hard as well as brittle and may flake or peel if the steel or iron component is bent.
  2. Sherardizing: The positioning of a systematically cleaned steel or iron component in an air-free enclosure where it is enclosed by metallic zinc dust. The architectural component is then heated and a thin, zinc alloy coating is made.
    1. Advantages: The coating will conform to the configurations of the component.
    2. Limitations: The Sherardizing process is generally limited to quite small objects
  3. Metallic Spraying: The application of a good spray of molten zinc to a pure steel or iron component. The coating can then be fused and heated with the surface of the steel and iron to produce an alloy.
    1. Advantages:
      1. Coating is less brittle than those produced by some of the other processes
      2. Coating will not flake or peel on bending.
    2. Limitations: The coating is more porous as well as becomes waterproof with time as products of corrosion fill in the pores.
  4. Electro Galvanizing: The involvement of iron or steel in an electrolyte, a solution of zinc sulphate or cyanide. Electrolytic action deposits a coating of clean zinc on the surface of the steel or iron.
    1. Advantages: The thickness of the coating can be accurately checked by using this process.
    2. Limitations: The thick coatings provided by the hot-dip galvanizing process are not usually possible with this method.
  5. Painting: Paint containing zinc dust pigments may be used as a protective coating to galvanized steel and iron.
    1. Advantages: The paint may be used in situ.
    2. Limitations:
      1. Painting is a less effective method of zinc coating than the other methods.
      2. Paint does not observe well to unpolluted zinc, nor to galvanized steel or iron.
      3. When paint peels from galvanized of steel or iron, it normally comes off completely along with the primer, letting out a fresh metal surface.

Thana Acid and Chemical Company, is a prominent chemical for galvanizing of steel manufacturer all over India as well as world wide. We at esteemed place in the market for supply of high grade industrial chemicals to our customers.