International Journal of Electrochemical Science,
Год журнала:
2024,
Номер
19(8), С. 100682 - 100682
Опубликована: Июнь 3, 2024
Different
CoCr
alloy
coatings
are
pulse
electrodeposited
on
the
surface
of
20#
steel
to
study
effect
duty
cycles
ranging
from
0.2
0.8
roughness,
thickness,
composition,
morphology,
and
corrosion
resistance
coatings.
Increasing
cycle
can
increase
Ton
time
improve
average
current
density,
which
is
beneficial
reduce
roughness
coating
thickness.
The
prepared
using
a
0.6
present
smallest
(Ra=0.339
μm)
largest
thickness
(25.7
μm).
However,
when
0.8,
Ra
suddenly
increases
1.081
μm
due
concentration
polarization
severe
hydrogen
evolution.
A
higher
conducive
improvement
Cr
content
in
coating.
When
increased
chromium
12.3%
30.4%
while
amount
cobalt
decreases
87.7%
69.6%.
formation
thin
layer
oxide
or
hydroxide
during
acts
as
protective
barrier
that
effectively
block
access
corrosive
media
such
sulfates,
carbonates
chlorides.
exhibits
optimal
with
density
(8.29
μA/cm2)
charge
transfer
(4924.13
Ω·cm2).
npj Materials Degradation,
Год журнала:
2024,
Номер
8(1)
Опубликована: Ноя. 29, 2024
In
this
study,
the
surface
analysis,
cross-section
analysis
and
electrochemical
were
used
to
explore
formation
mechanism
of
Nb
contents
on
passive
film
high-strength
anti-seismic
rebar
in
simulated
concrete
pore
solution.
The
passivation
experiments
confirmed
that
addition
promoted
stability
compactness
Nb-containing
rebar,
efficiency
was
stronger
than
CS
rebar.
Firstly,
with
decreases
pH,
increases
outer
layer
mainly
composed
Fe
oxides
oxyhydroxides,
inner
oxides.
Secondly,
beneficial
oxides,
which
enhanced
rate
inhibited
degradation
thus
enhancing
thickness
Metals,
Год журнала:
2024,
Номер
14(8), С. 865 - 865
Опубликована: Июль 27, 2024
Steel
reinforcement
in
marine
concrete
structures
is
vulnerable
to
chloride-induced
corrosion,
which
compromises
its
structural
integrity
and
durability.
This
study
explores
the
combined
effect
of
alloying
element
Cr
smart
corrosion
inhibitor
LDH-NO2
on
enhancing
resistance
steel
reinforcement.
Employing
a
machine
learning
approach
with
support
vector
(SVM)
algorithm,
predictive
model
was
developed
estimate
polarization
steel,
considering
content,
dosage,
environmental
pH,
chloride
concentration.
The
rigorously
trained
validated,
demonstrating
high
accuracy,
correlation
coefficient
exceeding
0.85.
findings
reveal
that
addition
application
synergistically
improve
resistance,
providing
actionable
insights
for
selecting
effective
protection
methods
diverse
environments.
International Journal of Electrochemical Science,
Год журнала:
2024,
Номер
19(8), С. 100682 - 100682
Опубликована: Июнь 3, 2024
Different
CoCr
alloy
coatings
are
pulse
electrodeposited
on
the
surface
of
20#
steel
to
study
effect
duty
cycles
ranging
from
0.2
0.8
roughness,
thickness,
composition,
morphology,
and
corrosion
resistance
coatings.
Increasing
cycle
can
increase
Ton
time
improve
average
current
density,
which
is
beneficial
reduce
roughness
coating
thickness.
The
prepared
using
a
0.6
present
smallest
(Ra=0.339
μm)
largest
thickness
(25.7
μm).
However,
when
0.8,
Ra
suddenly
increases
1.081
μm
due
concentration
polarization
severe
hydrogen
evolution.
A
higher
conducive
improvement
Cr
content
in
coating.
When
increased
chromium
12.3%
30.4%
while
amount
cobalt
decreases
87.7%
69.6%.
formation
thin
layer
oxide
or
hydroxide
during
acts
as
protective
barrier
that
effectively
block
access
corrosive
media
such
sulfates,
carbonates
chlorides.
exhibits
optimal
with
density
(8.29
μA/cm2)
charge
transfer
(4924.13
Ω·cm2).
