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Roughening

Roughening of (mostly) metallic surfaces...

for following treatments, such as varnishing and/ or powder coating.
to prepare surfaces, e.g. for rubber/metal compounds.
to structure woods, e.g. for artificial aging.

The following survey can be only a starting point.

The kind of blasting system and the wished demands on the surface can
influence and change the following list.

Basic material:	Blasting abrasive to take:
Fe - casting Fe - metals	Steel shot VERA GS-R (spherical) Steel grit GS-K (angular) Steel cut wire FILGRA StD-Z Malleable shot and grit THERMODUR
Nonferrous casting Nonferrous metals	Glass grit Steel cut wire FILGRA High-grade corundum white and pink Electro corundum NK I and NK II
Materials, such as wood, plastic, glass, etc.	Glass grit High-grade corundum white and pink Electro corundum NK I and NK II
	Special blasting corundum 3

One specialty of roughening is called sweeping. At this, a surface
is roughened without damaging it to prepare it for following coats.
Sweeping is used especially for zinced surfaces.

For sweeping in air-blast systems normally angular, metallic blasting abrasive
is used. In the meantime, sweeping is possible in wheel-blast systems, too.
In this case, special compositions of spherical and angular grains are demanded.