AIMS Materials Science,
Journal Year:
2023,
Volume and Issue:
10(3), P. 499 - 516
Published: Jan. 1, 2023
<abstract>
<p>The
current
laboratory
experiments
investigated
the
corrosion
resistance
of
carbon
steel
in
artificial
seawater
(ASW)
using
coupons
hanging
on
a
closed
glass
reactor
ASW
with
volume-to-specimen
area
ratios
ranging
from
0.20
to
0.40
mL/mm<sup>2</sup>.
These
were
immersed
for
varying
time
durations
(7
and
14
d)
at
room
temperature
without
agitation.
Further,
rates
based
weight
loss
electrochemical
analytical
method
determined.
Following
exposure
7
d,
0.2780
<italic>mmpy</italic>
0.3092
<italic>mmpy</italic>,
respectively.
The
surfaces
appeared
be
not
protected
by
oxides
this
result.
impedance
spectrometer
potentiostatic/galvanostatic
mode,
conjunction
EDX
analysis,
predicted
evolution
oxygen
reduction.
7th-day
immersion
sample
had
higher
content,
14th-day
slightly
lower
content.
Methods
X-ray
diffraction
(XRD)
scanning
electron
microscopy
(SEM)
characterized
surface
morphology
composition
their
product.
Corrosion
products
derived
rust
minerals
hematite,
lepidocrocite
magnetite
cover
after
exposure.
This
result
can
get
insight
into
behavior
low-carbon
used
marine
environments.</p>
</abstract>
Journal of Materials Research and Technology,
Journal Year:
2024,
Volume and Issue:
29, P. 386 - 399
Published: Jan. 17, 2024
The
microbiologically
influenced
corrosion
of
CoCrMnNi
high
entropy
alloy
induced
by
P.
aeruginosa
was
investigated
in
this
work.
results
electrochemical
tests,
time-of-flight
secondary
ion
mass
spectrometry
and
X-ray
photoelectron
spectroscopy
showed
that
the
thickness
passive
film
significantly
decreased
presence
HEA
accelerated.
When
organic
nutrients
were
deficient,
extracellular
electron
transfer
process
promoted
resistance
further
according
to
potentiodynamic
polarization
Mott-Schottky.
effect
deficiency
on
MIC
acceleration
more
prominent
after
degradation
film.
Mn
metal
substrate
preferentially
participated
bacterial
metabolism
as
an
alternative
energy
source
due
activity.
International Journal of Electrochemical Science,
Journal Year:
2023,
Volume and Issue:
18(3), P. 100069 - 100069
Published: Feb. 26, 2023
The
synergistic
effect
of
sand
deposit
and
sulfate-reducing
bacteria
on
the
X65
pipeline
steel
was
investigated
in
simulated
shale
gas
production
environment,
by
means
weight
loss
tests,
EIS,
SEM
EDS.
results
indicated
that
coexistence
sulfate
reducing
(SRB)
resulted
63%
reduction
uniform
corrosion,
but
183%
increase
localized
corrosion
rate.
EIS
revealed
formation
biofilm
altered
protectiveness
surface
mixed
layer
showed
a
trend
related
to
bacterial
growth
curve.
also
clarified
from
cross-section
morphology
EDS
analysis.
This
may
hinder
diffusion
substances
deposit/steel
interface,
thus
creating
microenvironment
at
interface
promotes
corrosion.
