Mechanical Properties and Corrosion Resistance of Thin Ceria and Phosphate Mono- and Multilayers Deposited on Technically Pure Al 1050
Materials,
Journal Year:
2025,
Volume and Issue:
18(2), P. 424 - 424
Published: Jan. 17, 2025
Calcium
phosphates
are
often
used
for
biomedical
applications.
Hydroxyapatite,
example,
has
a
wide
range
of
applications
because
it
mimics
the
mineral
component
natural
bone.
Widespread
interest
in
catalytic
properties
ceria
is
due
to
its
use
automotive
converters.
Effect
electroless
deposited
on
(non-anodized
and
anodized)
Al
1050
with
monolayer
Ce2O3
+
CeO2,
consecutive
bilayer
CeO2/Ca5(PO4)3OH
or
CeO2/(AlPO4
AlOOH
CePO4)
systems
indentation
modulus
(EIT)
hardness
(HIT),
as
well
their
corrosion-protective
ability
were
investigated.
For
structural,
chemical,
electrochemical,
mechanical
characterization
investigated
systems,
following
methods
used:
scanning
electron
microscopy
(SEM),
energy
dispersive
X-ray
analysis
(EDXS),
photoelectron
spectroscopy
(XPS),
polarization
resistance
(Rp),
corrosion
rate
(CR)
analysis,
nanoindentation.
It
was
found
that
HIT
EIT
coatings
an
anodized
aluminum
substrate
much
higher
than
those
non-anodized
substrate.
established
specific
influence
morphology
chemical
composition
formed
conversion
layers
improved
effect
these
layers.
The
obtained
results
valuable
since
there
no
data
such
literature
date.
Language: Английский
Sealing of cerium oxide coating primers on anodized AA2024-T3 alloy by boiling in Lourier buffers
Journal of Electrochemical Science and Engineering,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 4, 2024
Although
their
exceptional
re-passivation
ability,
Al-alloys
are
susceptible
to
corrosion
due
the
amphoteric
nature
of
alumina
passivation
films.
This
issue
is
exacerbated
by
disruption
these
films
intermetallics
on
surfaces
highly
doped
ones,
like
AA2024-T3
aircraft
alloy.
The
combination
anodized
aluminium
oxide
(AAO)
and
cerium
conversion
coatings
(CeCC)
shows
promise
as
a
coating
primer.
However,
defective
structures
CeO2
Al2O3
require
additional
sealing.
research
proposes
sealing
CeCC/AAO
layer
boiling
it
for
10
minutes
in
two
relatively
neutral
Lourier
buffers,
adjusted
pH
7.75,
mixture
them.
samples
underwent
series
analyses
compare
impact
procedure
surface
topology,
properties
(e.g.,
colour
wettability
from
each
set),
protective
ability.
It
was
assessed
after
24
hours
exposure
3.5
%
NaCl
model
corrosive
medium
six
set.
assessments
included
electrochemical
impedance
spectroscopy
(EIS)
potentiodynamic
scanning
(PDS)
techniques.
results
indicate
that
borate
buffer
improves
protection
primers
more
effectively
than
phosphate
mixed
ones.
Language: Английский