Abrasive Blast Cleaning

This method is widely utilized for removing all classes of scale & rust from castings, weldments , forgings and heat treated parts. Based on the finish requirements blasting might be the sole means of scale elimination or it might be used to remove the major portion of scale, with pickling employed to eliminate the remainder.

In this procedure, generally the parts are cleaned by the use of abrasive particles such as sand, steel grit, or shot, impelled against the surfaces to be cleaned.

Some cleaning is carrying out by means of a high velocity air blast, along with the blast directed by hand. In several cases, an airless blast machine that cleans by impact is also utilized. The abrasive is fed from an overhead storage hopper to the centre of a radially rotating wheel, whereupon the metallic shot or grit is hurtled in a controlled stream upon the work to be cleaned. All of the traces of sand, scale, oxides, and other materials are removed right down to the virgin metal, providing an outstanding surface for bonding final finishes.

The airless blast machine is utilized for cleaning engine blocks, crankshafts, castings of different size and shape, car wheels, rail road cars, oil and gas pipes, steel strip, and several other purposes.