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Sheet metal sandblasting is also one of Tecnos’ metal carpentry processes.

Blasting of metal sheets allows to eliminate any kind of imperfection from metal surfaces

Metal sandblasting is a special finishing process that aims to prepare the metal to accept a protective layer, which can be a simple paint or anti-corrosive treatment. Sandblasting and painting are in fact two processes that often go hand in hand in metalworking. Tecnos uses cutting-edge machinery for industrial sandblasting, located in the Cuggiono headquarters in Milan.

Why sandblast the sheets?

This type of work is necessary when the surface is covered with residues from previous work, which very often consist of oxides and rust.

These are in fact contaminants that risk ruining the very structure of the metal, even if it subsequently receives an anti-corrosive treatment. The latter, in fact, would be deposited on the same oxides.

Contaminations: prevention and protection

After all, even the mere presence of metals and oxides in the same environment leads to contamination.

Precisely for this reason the sandblasting carpentry provides a preventive and preparatory treatment for the actual protection. From this point of view, therefore, the sandblasting of the sheets closes the first production cycle of the product to start the finishing phase.

Different methods

In the steel industry, the most common system used for blasting sheet metal is the turbine system. It consists of passing the sheet metal sheets or structures to be treated in a chamber lined with vulcanized rubber or abrasion-resistant metal sheets.

In this chamber, the turbines launch silicon sand or metal microspheres at high speed. These hit and consume for a few tenths of a millimetre the entire surface of the object or sheet metal and remove anything that is not part of the pure metal.

The process of sandblasting sheet metal allows to eliminate rust, rolling calamine, sharp edges and burrs, leaving the metal clean and rough, ready for subsequent machining, welding or painting.