Advanced Engineering Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 18, 2024
In
order
to
improve
the
corrosion
resistance
of
micro‐arc
oxidation
(MAO)
ceramic
layer
AZ31
magnesium
alloy,
a
hydrophobic
Mg–Al
layered
double
hydroxide
(LDH)
coating
was
prepared
on
its
surface
by
one‐step
hydrothermal
method.
The
microstructure
characterized
scanning
electron
microscope,
energy
disperse
spectroscopy,
X‐ray
diffractometer,
and
Fourier
transform
infrared
spectrometer.
wettability
were
studied
contact
angle
(CA)
measuring
instrument
electrochemical
workstation.
Meanwhile,
durability
evaluated
sandpaper
abrasion,
tape
peeling
immersion
test.
results
showed
that
LDH
can
be
successfully
MAO
treatment
with
alkaline
aluminum
nitrate
solution
containing
sodium
laurate.
sealed
inherent
defects
coating,
resulting
in
significantly
improved
resistance.
With
extension
abrasion
distance,
times,
time,
CA
shows
downward
trend,
gradually
changed
from
hydrophilic.
However,
after
test,
still
has
good
resistance,
current
density
lower
than
layer.
