 VAC-U-CHECK
Hydrogen is
our friend or foe. Depending on the type
of casting you produce, hydrogen
absorption by molten aluminum can be
helpful or harmful.
With the 
Vac-U-Check you are assured a quick,
simple, economical, and accurate method of
monitoring the hydrogen level in your
melt.
A vacuum
solidified sample exaggerates the hole
size, making the analysis of gas in the
sample easy to determine by visual methods
or by using the specific gravity formula.
The use of
a Vac-U-Check unit is simple. Dip a 1/4
pound molten aluminum sample from your
furnace. Place the sample in the vacuum
chamber for solidification. After the
sample is cool, saw it in half for a
visual inspection or weigh the sample in
air and water to determine the true
specific gravity.
Should your
castings be at the premium level, a
minimum amount of gas is required. If you
are producing a commercial casting, a
small amount of gas cam be helpful in
reducing shrinkage, thus simplifying
gating, risering, chill usage, and
improving yield. See the samples above and
note shrinkage difference in the sample
solidified in air.
Contact us
for more information.
|
