As an angular, durable blasting abrasive, aluminum oxide
(or aluminium oxide) can be recycled many times. It is the most widely
used abrasive grain in sand blast finishing and surface preparation
because of its cost, longevity and hardness. Harder than other commonly
used blasting materials, aluminum oxide grit powder penetrates and cuts
even the hardest metals and sintered carbide.
Approximately 50% lighter than metallic media, aluminum oxide abrasive
grain has twice as many particles per pound. The fast-cutting action
minimizes damage to thin materials by eliminating surface stresses caused
by heavier, slower cutting media.
Aluminum oxide grit powder has a wide variety of applications, from
cleaning engine heads, valves, pistons and turbine blades in the aircraft
industry to lettering in monument and marker inscriptions. It is also
commonly used for matte finishing, as well as cleaning and preparing
parts for metalizing, plating and welding. Aluminum oxide abrasive grain
is the best choice for an abrasive sand blasting and polishing grain
as well as for preparing a surface for painting.
As a premier aluminum oxide abrasive grain supplier, General Sandblasting
recommends using virgin, brown aluminum oxide for optimal performance
versus reprocessed or remanufactured product. Virgin, brown aluminum
oxide contains less than 1.5% free silica and is therefore safer to
use than sand. The grit size is consistent and cuts much faster than
sand, leaving a smoother surface. Generally, the larger the grit size,
the faster aluminum oxide will cut.