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Testing via Electrical Conductivity
As the name suggests, electrical conductivity provides information on
how well a material conducts electricity. This non-destructive method
provides information regarding the microstructure, mechanical properties
and changes in composition. In industries such as aerospace, aluminum
processing and precious metals, this plays a crucial role. The
SIGMASCOPE® SMP350 is used, for example, for testing on aircraft wings.
It was specially developed for measuring the electrical conductivity of
non-ferrous metals or non-magnetizable metals in accordance with DIN EN
2004-1 and allows conclusions to be drawn about the hardness and
strength of heat-treated materials, among other things. The conductivity
of aluminum alloys for anodizing processes can also be measured easily
and non-destructively. The phase-sensitive eddy current method is used
for the measurement.
With the SIGMASCOPE® GOLD B and C hand-held gauges, you can test
non-destructively one of the most precious materials: gold. The density
of the base material tungsten is almost exactly the same as the density
of gold – but the electrical conductivity of both differs significantly.
This type of non-destructive material testing takes advantage of this
fact. For example, the measurement of electrical conductivity in
accordance with DIN 50994 allows the immediate detection of
counterfeits.