Shot blasting, sandblasting and glass blasting are surface treatment processes for elements made of e.g. metal. The idea is to clean the steel/cast iron surface from various contaminants such as rust, corrosion, paint or varnish remnants. After the shot-blasting process, the surface of the processed detail becomes clean and is given the desired structure – usually a delicate roughness, which is an ideal base for a new protective layer (e.g. painting).

The goals of shot blasting may be different: from improving the aesthetics of the detail, through unifying and refining the surface, to strengthening its structure.

In the shot-blasting process, also commonly called sandblasting, various types of materials with abrasive properties and various techniques are used. Abrasive materials used for shot-blasting metals include: cast steel, sand, corundum, crushed glass and garnet. A stream of compressed air, liquid or high speed of the turbine throwing the abrasive is also necessary.

The choice of abrasive, the amount of compressed air pressure, the speed of the turbine, the possible use of liquid in the process – all this affects the desired final effect of the treated surface.

At MARGO, in the Kraków branch, we mainly use spherical steel shot in a closed system, which is thrown onto the surface of the processed material using turbine blades. The rotation speed is regulated by using an inverter and depends on the material being processed.

The process of shot-blasting elements using the charge method usually takes 6-20 minutes, depending on the amount of charge, the size of the processed elements and the degree of corrosion.

It is worth noting that the dry shot blasting process is noisy and involves a lot of dust in the surroundings, therefore it requires special occupational health and safety conditions.

Shot blasting service at MARGO – what elements we shot blast and how to contact us (click)