In order for paint products to lay on the surface of metal structures properly, high-quality pre-treatment is required, which increases the protective properties of the metal. There are two types of preliminary preparation for applying paint and protective coatings: sandblasting and shot blasting. The essence of these methods is to process the metal surface with a powerful jet of compressed air mixed with particles of abrasive materials.
Shot blasting is the effect of abrasive particles on metal parts. Steel or cast-iron shot flies at high speed from the nozzle of the shot blasting machine and hits the surface to be processed, resulting in a protective layer with a high compressive stress. The processed part has good anti-corrosion properties, as the surface is completely cleaned of rust, scale, remnants of old coatings, oil and other contaminants. Processing is necessary before painting or applying a protective coating on them. Unlike sandblasting, shot is better and faster to clean any metal surface.
Sandblasting — cold abrasive treatment of the surface of metal products, by damaging its surface with sand or other abrasive powder, sprayed by a stream of air, air with water (pneumohydroblasting method), or only by a jet of water or other liquid (hydrojet method). For some types of products, according to the technological process, it is necessary to apply a protective insulation coating. This process is outsourced to the chemical Protection company, despite the performance of insulation work by specialists of another company, JSC “Kaskor-Mashzavod”, controls the performance of work in accordance with the technology and checks the qualifications of personnel, and therefore the process is under full control of the company.