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Schmidt MV3 - Page 76

Schmidt MV3
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Copyright © 2021 Axxiom Manufacturing, Inc.
12.5 Surface Preparation Information Sources
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: 1-877-281-7772
Website: www.sspc.org
The Society for Protective Coatings
800 Trumbull Dr.
Pittsburg, PA 15205
National Association of Corrosion Engineers (NACE) develops test methods and
recommended practices on surface preparation techniques and coatings.
Phone: 1-800-797-6223
Website: www.nace.org
National Association of Corrosion Engineers
15835 Park Ten Place
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 128 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

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