Surface preparation & paint stripping brown aluminum oxide

Surface preparation & paint stripping brown aluminum oxide

/MT

Brown Aluminum Oxide is a virgin grain, manufactured in an electric furnace that produces an extremely tough, long-lasting blasting grain which is graded to exacting standards. It may be repeatedly recirculated and is chemically stable and not affected by alkalies, acids or harmful atmospheres.

Aluminium oxides are fast and effective for removing rust, mill scale, paint, carbon deposits. Aluminium oxide media will remove residues from your substrate twice the speed as sand, without all the health risks. Aluminum Oxide media is excellent for antiskid, antislip flooring coatings, and an additive for epoxy floor systems.

Chemical & Physical Properties
Crystal FormAlpha alumina trigonal system
Chemical natureAmphoteric
Reaction with acidsSubject to mild attack by aqua and hydrofluoric acid
Reaction with AlkaliesVery slight with strong hot solution only
Oxidation-reduction effectsNone
True Density(g/cm3)3.97
HardnessKnoop(kg/cm2)2000-2200
Moh’s9
ColourDark Brown
Colour after firingLight blue
Melting point2000°C
Max Usable temperature1900°C
Specific heat (cal/g.°C)0.26(20-29°C)
Coefficient of thermal conductivityRoom temperature900°C
(cal/cm2.sec.°C)0.0470.013
Electrical resistivity (Wcm)30°C300°C900°C1600°C
10161013105104
Coefficient of linear expansion     (x10-6)7-9(0-1600°C)

Grit No.MicronGrit No.MicronGrit No.Micron
102360 ~ 200030710 ~ 60080212 ~ 180
122000 ~ 170036600 ~ 50090180 ~ 150
141700 ~ 140040500 ~ 425100150 ~ 125
161400 ~ 118046425 ~ 355120125 ~ 106
201180 ~ 100054355 ~ 300150106 ~ 75
221000 ~ 85060300 ~ 25018090 ~ 63
24850 ~ 71070250 ~ 21222075 ~ 53
Available micron powder sizes
China GB 2477-83JISFEPA(84) / DIN(70)ISO(77)
Grit No.Standard size range(µm)Grit No.ds50 value (µm)Grit No.ds50 value (µm)Grit No.ds50 value (µm)
Standard werte der Mikro-F-ReiheSerigraph 5000D
24060.0±4.0P24058.5±2.0
28052.0±3.0P28052.2±2.0
W6363 – 5032046.0±2.5F230/5353±3.050.0±3.0P32046.2±1.5
W5050 – 4036040.0±2.0F240/4544.5±2.042.0±2.0P36040.5±1.5
40034.0±2.0P40035.0±1.5
W4040 – 2850028.0±2.0F280/3736.5±1.534.5±1.5P50030.2±1.5
60024.0±1.5F320/2929.2±1.527.7±1.5P60025.8±1.0
W2838 – 2070021.0±1.3F360/2322.8±1.521.6±1.5P80021.8±1.0
80018.0±1.0F400/1717.3±1.016.5±1.0P100018.3±1.0
W2020 – 14100015.5±1.0F500/1312.8±1.012.3±1.0P120015.3±1.0
W1414-10120013.0±1.0
150010.5±1.0F600/99.3±1.09.0±1.0
W1010-720008.5±0.7
W77-525007.0±0.7F800/76.5±1.06.3±1.0
W55 – 3.530005.7±0.5F1000/54.5±0.84.5±0.8
F1200/33.1±0.53.1±0.5
for general purposesfor general purposesfor bonded abrasivesfor coated abrasives

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