Fluorescent probe detection of metals in corrosive environments
Abstract
Corrosion
of
metal
surfaces
is
slowed
down
with
the
addition
of
protective
coatings.
Two
studies
that
have
explored
monitoring
corrosion
of
pigmented
and
non-‐pigmented
coatings,
using
metal
sensitive
fluorescent
probes
will
be
discussed.
The
Rawlins
group
at
the
University
of
Southern
Mississippi
investigated
the
use
of
KMG-‐20-‐AM,
a
magnesium
sensitive
probe,
to
predict
the
lifetime
of
a
magnesium
coating
on
an
aluminum
alloy
panel.
An
increase
in
fluorescence
intensity
of
KMG-‐20-‐AM
doped
magnesium
coating
suggested
an
interaction
with
the
free
magnesium
in
the
coating.
Sibi
and
Zong
focused
on
fluorescence
of
samples
of
the
corrosion
solution
for
an
aluminum
alloy
panel
with
the
use
of
three
metal
ion
selective
probes.
The
fluorescence
intensity
of
the
corrosion
solution
samples,
of
the
aluminum
panel,
suggested
different
leaching
progressions
of
metal
ions
from
the
panel.
Based
on
the
results
of
these
studies,
the
data
suggest
that,
there
is
a
high
potential
for
the
use
of
fluorescent
probes
as
a
technique
to
monitor
metal
corrosion.
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