50
The Society for Protective Coatings (SSPC)
consists of research and testing committees,
conducts seminars and establishes industry standards on surface preparation methods, abrasive
and coatings.
Phone: 1-412-281-2331
Website: www.sspc.org
The Society for Protective Coatings
40 24th Street
Pittsburg, PA 15222-4643
National Association of Corrosion Engineers (NACE)
develops test methods and recommended
practices on surface preparation techniques and coatings.
Phone: 1-281-228-6200
Website: www.nace.org
National Association of Corrosion Engineers
1440 South Creek Drive
Houston, TX 77084
12.6
Table of Blast Abrasive Characteristics
Abrasive
Type
Hardness
(Mohs)
Grain
Shape
Density
Lbs/ft3
Color
Free
Silica
Content
No. of
Recycles
Initial
Cost Typical
Use
Corn Cobs
2
angular
35-45
tan
none
4-5
low
stripping paint from
delicate substrates
Sodium
Bicarbonate
2.8 crystal 60 white
none 4-5
medium
cleaning and stripping paint
from delicate substrates
Walnut Shell
3
angular
45
lt.
brown
none
4.5
low
stripping paint from
delicate substrates
Plastic 3.2
angular
45-60
white
none
8-10
medium
Paint stripping,
deburring, and cleaning
Glass Beads
4.5
spherical
90
crystal
none
8-10
low
cleaning
finishing
Starblast XL
6.5
spherical
100
lt. brown
<1%
4-5
medium
outdoor blasting
Coal Slag
7
angular
85
black
none
1-2
medium
outdoor blasting
Copper Slag
7
angular
112
black
none
1-2
medium
outdoor blasting
Garnet 7
angular
147
pink
<2%
4-5
medium
outdoor
blasting
Steel Shot
8
spherical
280
steel grey
none
200
low
cleaning and peening
Steel Grit
8
angular
280
steel grey
none
200
medium
removing heavy scale
Aluminum
Oxide
9
angular
120
brown
<1%
6-8
medium
cleaning and finishing,
deburring and etching