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).
Case Studies in Construction Materials,
Год журнала:
2024,
Номер
21, С. e03584 - e03584
Опубликована: Июль 29, 2024
Anchor
cables
in
water-rich
roadways
frequently
experience
severe
corrosion
and
resultant
fractures
due
to
the
combined
effects
of
mine
water
high
stress.
However,
precise
factors
influencing
on
these
remain
ambiguous,
presenting
challenges
roadway
support
safety.
This
study
investigated
impact
major
ions
present
weakly
alkaline
anchor
cable
using
salt
spray
experiments.
The
results
indicated
that
anions
such
as
Cl-
notably
influence
corrosion,
which
primarily
manifested
pitting
corrosion.
nominal
yield
strength
decreased
by
95.68–156.01
MPa,
tensile
133.44–202.77
MPa
because
a
decrease
cross-sectional
area.
During
process,
continuously
degraded
passivation
film
surface
cable,
exposing
its
internal
metal
structure
exacerbating
until
eventual
fracture
failure
occurred.
Therefore,
this
paper
proposes
protection
technique
for
realize
superior
protective
compared
conventional
used
concurrently
field
applications.
