The non-invasive corrosion sensor includes a heat sink, at least two peltiers,
a reference standard and a data acquisition device. Each peltier has a negative
side and a positive side, and each peltier communicates with the heat sink such
that the negative side of each peltier is maintained at a common temperature. The
reference standard communicates with the positive side of one of the peltiers while
the test piece communicates with the positive side of the other peltier; and the
data acquisition devise is able to record and compare the differences in temperatures
between the test piece and the reference standard. A higher temperature in the
test piece than in the reference standard indicates the presence of corrosion.
The differences in temperatures of the test piece and the reference standard are
obtained via electrical currents in the peltiers.
