Fastener Coatings

Zinc metal coating: features and types

Galvanizing is one of the most common methods of protecting metal from corrosion. Zinc covers the surface of the metal, forming a protective layer that prevents the effects of aggressive environmental factors. In addition, zinc improves the appearance of products and increases their resistance to mechanical damage. Consider the features and types of metal galvanizing.

Galvanizing features

Galvanizing is the process of applying a protective layer of zinc to the metal surface. Zinc is applied to the metal in two ways - hot or cold. Hot-dip galvanizing is carried out at a temperature of 450-460 ° C, when zinc begins to melt and is evenly distributed over the metal surface. Cold galvanizing is carried out in a cold state with the help of special zinc-based formulations.

Galvanizing allows you to maximally protect metal products from corrosion and improve their appearance. Depending on the thickness of the zinc layer, which is applied to the metal surface, the following types of galvanizing are distinguished:

  • Thin-layer galvanizing is a layer of zinc up to 5 microns thick, designed to protect products from oxidation and corrosion.
  • Medium layer galvanizing - a layer of zinc up to 15 microns thick, ensures the durability of products, protection from the effects of atmospheric phenomena and external factors.
  • Thick-layer galvanizing - a layer of zinc up to 100 microns thick or more, is used to maximize the protection of products from corrosion in aggressive conditions.

There are several types of metal galvanizing, each of which has its own characteristics and application:

  1. Hot-dip galvanizing is a technology in which a metal object is immersed in molten zinc. As a result, a thick layer of zinc is formed, which protects the metal well from corrosion and other environmental influences.
  2. Cold galvanizing is a process in which a special zinc coating is applied to the metal surface in the form of an aerosol or brush. This coating does not have the same strength and protective properties as hot-dip galvanizing, but can be useful to protect the metal from oxidation in small areas.
  3. Electrolytic galvanizing is a method in which a metal object is immersed in a zinc solution and an electric current is conducted. This allows you to get a coating of uniform thickness and good adhesion to the metal.
  4. Phosphating followed by galvanizing is a technology used to protect the metal surface from corrosion. In this case, a layer of phosphate is applied to the surface, which forms the basis for further galvanizing.

Each of these methods of galvanizing has its advantages and disadvantages, and the choice of method depends on the type of metal, its use and requirements for surface protection.

As you can see, the use of zinc as a protective coating for metal products is the most effective and common method. Moreover, the zinc coating has a number of other advantages, such as improved corrosion resistance, as well as a decorative appearance.

Zinc coating can be used to handle various types of fasteners, such as bolts, nuts, washers, anchors, studs, etc. zinc can also be used to cover frames, fences and fences, profiles, pipes and other metal products.

One of the main advantages of zinc coating is its ability to provide a high degree of corrosion protection. This is explained by the fact that zinc is a metal with a high oxidation potential, which allows it to react with oxygen and water, forming a passive film on the metal surface that protects it from oxidation.

In addition, zinc has the property of self-defense. If the zinc coating is broken, the metal begins to corrode only in places of damage, while the rest of the surface remains protected.

One of the additional advantages of zinc coating is its decorative appearance. Zinc has a silvery-white color, which gives the product an aesthetically attractive look. In addition, zinc can be painted in different colors, which gives greater design freedom in the manufacture of metal products.

Zinc can be applied to the surface of metal products in several ways, including hot-dip galvanizing, electrolytic galvanizing, coating in aerosol form. Each of these methods has its own characteristics and is used depending on the requirements for the quality of the coating, the type of metal and the operating conditions of the product.

As we have already mentioned, the surface coated with zinc has increased corrosion resistance and durability. This makes the galvanizing of hardware especially popular in many industries.

However, it should be borne in mind that zinc coating may have its drawbacks. For example, the protective properties may decrease with high humidity and acidity of the environment, as well as when exposed to aggressive chemical compounds.

In addition, galvanizing may form voids and irregularities on the surface of the metal, which may adversely affect its mechanical properties. It should also be borne in mind that zinc, as a metal, can lead to electrochemical corrosion in contact with other metals.

However, despite this, zinc coating remains one of the most common ways to protect metal products from corrosion. In addition, there are many different technologies and methods of galvanizing, which can improve its protective properties and minimize possible disadvantages.

An important aspect is also the choice of a galvanizing company. Qualified specialists, professional equipment and compliance with all technological processes are the key to high-quality and reliable galvanizing of metal products.

Thus, zinc coating is an effective way to protect metal products from corrosion and increase their durability. It is important to choose the right technology and a galvanizing company in order to get a quality result.

TDV Kalibr is one of the leaders in the field of galvanizing fasteners. Here are some reasons why contacting this company can be beneficial:

  1. Experience and qualifications: The company has many years of experience in the market of galvanized fasteners, which allows it to guarantee high-quality and professional performance of work.
  2. Quality: The company uses modern equipment and high-quality materials, which ensures high quality coating and durability of products.
  3. Variety of services: The company provides a wide range of services for galvanizing fasteners, including galvanic galvanizing, galvanizing with black zinc, hot-dip galvanizing and other types of coatings.
  4. Individual approach: The company is ready to offer individual solutions for each client, taking into account all his needs and wishes.
  5. Efficiency: The company has a high speed of order processing and is ready to complete the work in the shortest possible time.

In general, contacting Caliber ALC can be a reliable and effective solution for anyone who is looking for professional assistance in the field of galvanizing fasteners.