Powder coating of metal

There are plenty of different ways of applying various coatings on the metal. They include anodizing, silver plating, galvanizing, gilding, chrome plating, as well as the usual coloring of the metal with the help of varnishes and paints based on organic solvents. All these coatings are applied to protect the metal surface from corrosion, as well as for decorative purposes. Coating the surface with corrosion resistant metals — tin, chromium, silver — is an expensive and time-consuming process, while applying conventional oil paints does not provide a durable protective layer.

Therefore, modern technology of painting uses another method – powder coating of metal, which is much cheaper than the method of applying precious and inert metals and, at the same time, much more reliable than ordinary paint.

Metal which must be coated with a powder must go through several processing steps:

• surface preparation; • degreasing and drying; • powder coating; • heat treatment; • cooling.

The powder coating of metal is durable. This technology is suitable for painting aluminum profiles, forged products, galvanized surfaces. For this reason, the scope of powder coating of metal is very wide. It is used in construction, agricultural engineering, automotive industry, architecture, in the manufacture of household appliances.

The service life of the product depends on many factors, but the protection of the metal from corrosion is one of the most important. The most popular protection option is hot dip galvanizing, which is used worldwide.

What is galvanization of metal?

Metal galvanization means full immersing a metal product in molten zinc. Most often the coating thickness of the product is up to 100 microns. This thickness protects the product from possible adverse environmental effects, and does not expose to electrochemical effects.

Punto Group is one of the few companies in Russia that galvanizes each of its products. This procedure is very important in the production of outdoor furniture, because thanks to it, 100% corrosion protection is achieved and each product will serve you for a long time.

The main advantages of metal structures galvanizing

Galvanizing is selected to process metal structures because of its advantages which make this technology much better than the others:

Durability

If the product is galvanized, it serves much longer than a product that was not protected from corrosion;

Quality

Over time corrosion can cause great damage to the metal structure, making it more fragile. It is the galvanizing process that makes the metal product more qualitative;

Versatility

Almost all metal structures can be galvanized. Due to all these advantages, hot-dip galvanizing services are often used in urban construction.

Stages of metal galvanization

Only at first glance galvanizing is a simple procedure. In fact, the technology includes 5 stages, each of them is of great importance and influences the final result.

1. Degreasing. Metal constructions should be thoroughly cleaned from greasy stains or oils in order to create a reliable protection against corrosion.

2. Etching. At this stage the metal is cleaned of the already accumulated corrosion. It is important for parts that have already been in operation.

3. Washing. Removes various particles left after etching.

4. Drying. Specialists heat the product with the help of special equipment up to 100 degrees. Due to the high temperature, the flux salts are drying.

5. And, finally, the process of galvanizing. As we noted above, the product is completely immersed in molten zinc, due to which it acquires a zinc sheath. It should be noted that all processes occur exclusively in technological conditions, where objects are placed into special tanks.