Shot Blasting

This process is primarily used to strengthen, clean and polish metal. The most common method is known as air blasting. This involves the use of compressed air and an abrasive medium (known as “shot”). Sand, tiny spherical glass beads and other materials can be used. Such blasting is also employed before processes such as colouring and welding take place.

Not only is this a very cost-effective technique, but the ability to provide a uniformly even matte surface is beneficial in industries such as aerospace, forging and ship building. A primary advantage is that it extends the longevity of the end product while using ecologically friendly materials (as opposed to chemical abrasives). Perhaps most importantly, shot blasting facilitates a bond between the surface and the final coating (such as epoxy or paint). It is also beneficial before a coat of galvanised metal such as zinc is applied, as stronger levels of adhesion are guaranteed.