Abrasive blasting is the best mechanical method concerning surface preparation. It allows for obtaining the highest degree of surface cleanliness before applying protective coatings, i.e. Sa 3 acc. to PN-ISO 8501-1: 1996.
Proper preparation of steel substrate has an essential impact on quality and durability of protective coating, this effective protection of the structure against corrosion. This method provides an option of obtain the requested roughness profile. This machining can be characterized with high effectiveness.
There are two basic versions of abrasive blasting: rotational and pneumatic. In the rotational version, abrasive grains are dropped on the machined surface using and discharge wheel with significant force. The pneumatic version ejects the abrasive grains from a nozzle using compressed air. The most common abrasive grains include: cast iron grit, steel grit cut from wire, steel casting grit, quartz sand, aloxite, slag.
Metal grit is used with machines with closed circuit of grit this it is used many times. Mineral abrasive grains, due to their low durability, can only be used once in open circuit, i.e. they are removed from the device after use.
Rotational abrasive machining is the most effective method of cleaning the surfaces. The main feature of pneumatic machining is the option to direct the flux on any surface.
Mostostal Siedlce offers all the mentioned methods of machining: rotational blasting, pneumatic blasting with closed circuit of abrasion grains, pneumatic blasting with open circuit of abrasion grains.