Shot blasting is a method used to clean, polish and strengthen metals. It is used in almost every industry that uses metals, including construction, automotive, ship building and rail industries. There are two technologies used in shot blasting, including air blasting and wheel blasting.
Shot blasting leaves metallic surfaces ready for application of overlays or coatings, thereby eliminating costly drying time and disposal procedures that are normally associated with other surface preparation processes. It produces the highest bonding character of any other known surface preparation method.
Shot blasting uses spherical shots to clean a surface, and in 2014 it is used for various purposes such as preventing metal fatigue or stress cracking, as well as for surface hardening and cleaning. The materials commonly used in shot blasting include sand, silicon carbide granules and small steel balls.
The wheel blasting method involves the conversion of electric motor energy into kinetic abrasive energy through the rotation of a turbine wheel. Air blasting involves compressing air into the component by projected nozzles. In certain applications, wet blasting may work best; this method involves using a media-water mix.
Shot blasting works by using a high performance and airless centrifugal wheel that propels blast media at a high speed in a highly controlled pattern.