Stainless steel blasting

Stainless steel blasting is the final step in surface treatment and is often used as preparation for the application of other coatings, most often paints. We use abrasives of various materials and sizes for blasting, both round and sharp-edged. Stainless steel can be blasted in the roughness range Ra 0.8 to approx. 6.3. When working, we meet individual customer requirements. The choice depends on the desired appearance and roughness of the final surface. However, if you are not sure exactly how to proceed, please contact us and we will be happy to provide you with the necessary advice and recommendations.

When using round abrasives, the result is a uniform surface with a velvety appearance. This surface treatment is increasingly used in a wide variety of industries. However, it only provides a visual finish, not anti-corrosion protection. If you also require anti-corrosion treatment, blasting must be combined with pickling.

 After blasting, the parts can be preserved, for example during assembly, to achieve a surface more resistant to dirt and impurities.

We currently have four blast boxes for blasting stainless steels, aluminium alloys and non-ferrous metals. All boxes are equipped with rails for handling heavy parts. The area in front of the blast boxes is served by a crane with a load capacity of 20,000 kg.

Maximum annual capacity of about 100,000 m².

The goal of each process is to optimise the final product with respect to the cost of the process. It would be a shame to damage the result of our work during the journey to the customer. That is why our standard operation is the packaging of all blasted parts. The basic packaging is done in shrink wrap and mirelon, paper board or bubble wrap. In the case of larger and bulkier parts, we also use wooden liners, wooden pallets or crates. If more sophisticated or special packaging is required, we are able to accommodate any packaging method, including packaging suitable for sea transport, in cooperation with external specialist companies. We do not pack only on direct customer request.

Following blasting, the surface will be clean and free of corrosion and paint build-up after welding. It will be unified to the maximum possible extent, which, however, depends on the mechanical pre-treatment, quality and roughness of the surface for blasting. After blasting, the parts are blown with compressed air. However, a thin layer of fine dust may remain on the surface and stick to it due to electrostatic forces.  

Blasting, however, does not remove slag, burnt grease in welds, deep inclusions of carbon material, impurities ground into the surface, baked-on protective film residues, markings and other flaws. Blasting mattifies the surface and increases the surface roughness. Also, due to the kinetic energy of the abrasive, it causes a slight stretching of the blasted surface and internal stress. For some types of parts, this manifests itself in deformation. This phenomenon is more pronounced for surfaces blasted on one side and also for surfaces of sheet metal parts up to 2 mm thick blasted on both sides. 

The final surface quality is supervised by a team of technicians from the quality department. On request, they will issue a report on performance of work on the order, according to CSN EN 10204 – Declaration of Conformity with the Order. The resulting surface roughness is checked in accessible places using a roughness meter. Upon request, the resulting surface roughness can be compared to the requirements of ISO 8503-1 or ISO 2632.