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HYSCAN
The apparatus for hydrogen content measurement is HYSCAN ¢ò made
by SEVERN SCIENCE
LTD., UK. RPT, a semi-quantitative technique, is used to determine
the hydrogen in
aluminum melts. Reduced pressure test (RPT) is also called vacuum
solidification
test or Straube-Pfeiffer test. A small amount of molten aluminum
alloy sample is
allowed to solidify under controlled reduced pressure and the gas
content is
estimated or determined by observing the solidification behavior
of the specimen
or by density measurement or porosity analysis of the solidified
specimen.
Measurement accuracy is 0.01ml/100g and measurement range is 0-0.99
cm/100g.
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