The
Abrasiive Blast Cleaning is the cleaning of the surface by the action
of granular abrasives propelled either by compressed air through a
nozzle or by using a vaned hardened steel blast wheel.Abrasive Blast
Cleaning provides a method of surface preparation that is rapid and
well established. Blast cleaning in its purest sense,relies primarily
on mechanical forces(rather then chemical) to achieve cleaning
performance.To blast clean,some form of media needs to be directed and
“blasted” via some method of delivery,towards a surface.The mechanisms
of delivery and types of medis are wide and diverse and the possible
combinations are many.With this versatility,blast cleaning,if specified
properly,can be used to clean in many applications. There are several
methods and equipment options available for delivering blast medis --
again,these depends on the application.Different applications require
different media - and there are many media choices from which to
select.Blast Cleaning is line-of-sight in nature.As such,only those
surface that can be impacted by the blast spray may be effectively
cleaned. In this seminar,we discuss the physical properties of metallic
and non-metaalic blasr-cleaning abrasives and describes their
versatility in producing various degrees of finish and cleanliness on
metal surface.Also reviewed are types of metallic abrasives and an
analysis of blast-cleaning with these abrasives.
