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Outgassing rates of aluminium table

Engineering Materials

Outgassing rates of aluminium table
Note the different methods of measurement and treatment of samples.

Outgassing (also known as offgassing) occurs when gas is released from adhesives, encapsulants, lubricants, sealants, and other materials ferrous and non-ferrous.

Material
Treatment
Outgassing rate
(torr-L/sec-cm2)
Time (hours)
Test method
Reference
Year
Aluminium
None
1x10-6
1h
-
Schamus (ref Markley, et al)
1999
Aluminium
Degassed
1.7x10-7
1h
-
Schmaus (ref Markley, et al)
1999
Aluminium
Degassed
2.7x10-8
10h
-
Schmaus (ref Markley, et al)
1999
Aluminium
6061-T6
Baked 13.5h @ 300°C
1.4x10-8
10h
-
Schmaus (ref Das)
1999
Aluminium
Cleaned
8x10-9
10h
-
Schmaus (ref Blears, et al)
1999
Aluminium
Fresh, degreased
w/ trichloroethylene
& cleaned w/ ethyl alcohol
6.3x10-9
1h
conductance
Elsey (ref Schram)
1975 (1963)
Aluminium
Degassed
4.6x10-9
100h
-
Schmaus (ref Markley, et al)
1999
Aluminium
6061-T6
Baked @ 200°C
4.5x10-9
10h
-
Schmaus (ref Das)
1999
Aluminium
Degassed 24h,
degreased w/ trichloroethylene
& cleaned w/ ethyl alcohol
4.14x10-9
1h
conductance
Elsey (ref Schram)
1975 (1963)
Aluminium
6061-T6
None
2.5x10-9
10h
-
Schmaus (ref Das)
1999
Aluminium
5083-O
Bell jar, as received,
room temp.
2.18x10-9
10.3h
Rate-of-rise
Schrank, et al
1964
Aluminium
5083-O
Bell jar, as received,
room temp.
1.27x10-9
8h
Conductance
Schrank, et al
1964
Aluminium
5083-O
Bell jar, as received,
room temp.
6.6x10-10
24h
Conductance
Schrank, et al
1964
Aluminium
5083-O
Bell jar, as received,
room temp. after
baking @ 220°C
4.6x10-10
50h (baked @27-31h)
Conductance
Schrank, et al
1964
Aluminium
6061-T6
Baked 15h @ 300°C
1.6x10-10
10h
-
Schmaus (ref Das)
1999
Aluminium
Degassed 24h, degreased
w/ trichloroethylene
& cleaned w/ ethyl alcohol
3.06x10-10
1h
conductance
Elsey (ref Schram)
1975 (1963)
Aluminium
5083-O
Bell jar, no. 4 finish
(lapped), room temp.
2.87x10-10
6.0h
Rate-of-rise
Schrank, et al
1964
Aluminium
Fresh, degreased
w/ trichloroethylene
& cleaned w/ ethyl alcohol
6.0x10-10
10h
conductance
Elsey (ref Schram)
1975 (1963)
Aluminium,
type 1100
Cleaned w/ detergent,
rinsed w/ acetone,
pumped 24 hours
~10-10
0
conductance
Young
1968
Aluminium
LEP vacuum chamber,
chem.. clean,
baked insitu @ 150°C
2.3x10-10
24h
-
Mathewson, et al
1988
Aluminium
6061-T4
Degreased in acetone
w/ methanol rinse;
baked 100°C
6x10-12
24h
Rate-of-rise
&
conductance
Halama, Herrera
1976
Aluminium
6061-T4
Degreased in acetone
w/ methanol rinse,
chem polished,
baked 100°C
3x10-12
24h
Rate-of-rise
&
conductance
Halama, Herrera
1976
Aluminium
6061-T4
Degreased in acetone
w/ methanol rinse,
chem polished,
glow discharge in
Ar, baked 100°C
5x10-12
24h
Rate-of-rise
&
conductance
Halama, Herrera
1976
Aluminium,
type 1100
Above plus baked
15h @ 250°C
under vacuum
4x10-12
24h @ room temp
conductance
Young
1968
Aluminium
PETRA vacuum
chamber, glow
discharge@145°C
1x10-12
Up to 200h
In situ glow
discharge, conductance
Mathewson, et al
1977

Reference: FermiLab

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