Materials,
Год журнала:
2024,
Номер
17(16), С. 4078 - 4078
Опубликована: Авг. 16, 2024
The
effect
of
crevice
size
on
the
corrosion
N80
carbon
steel
was
investigated
by
electrochemical
measurements
and
surface
analysis
in
a
CO2-saturated
NaCl-HAc
solution.
exhibits
high
susceptibility
to
this
environment,
which
can
be
initiated
immediately
without
an
induction
period
for
specimens
with
sizes
100
μm,
300
500
μm.
Typically,
solutions
become
more
acidic
during
corrosion;
however,
study,
solution
became
alkaline,
resulting
galvanic
between
inner
outer
surfaces
leading
severe
corrosion.
pH
levels
μm
are
similar,
but
both
notably
higher
than
that
specimen
size.
As
result,
there
is
no
significant
difference
phenomenon
sizes,
it
Applied Sciences,
Год журнала:
2023,
Номер
13(7), С. 4586 - 4586
Опубликована: Апрель 4, 2023
Corrosion
inhibitors
are
evaluated
in
the
oil
industry
with
electrochemical
tests
of
resistance
to
linear
polarization
rotating
cylinders
following
ASTM
G170
and
NACE
3T199
standards.
With
these
tests,
we
can
determine
corrosion
rate
(CR)
efficiency
inhibitors.
In
this
work,
a
test
protocol
used
by
hydrocarbon-producing
companies
for
testing
was
used.
This
consists
1045
carbon
steel
working
electrode
solution
composed
9.62%
NaCl,
0.45%
CaCl2,
0.19%
MgCl2,
89.74%
H2O,
at
temperature
65
°C
saturated
CO2.
Each
inhibitor
tested
subjected
series
6000-4000-2000-4000-6000
rpm
using
cylinder
electrodes
(RCEs).
These
studies
were
carried
out
evaluate
ability
prevent
presence
centrifugal
force.
our
opinion,
does
not
provide
engineers
enough
information
be
as
predictive
tool,
since
what
is
obtained
CR
very
short
time.
document
proposes
use
two
more
appropriate
methodologies,
(RCE)
flow
loop
(FL),
performance
inhibitor.
For
FL,
selected
1.2
m/s,
same
that
fluids
have
company
pipelines
installed
Neuquén,
Argentina.
Firstly,
according
company’s
protocol,
required
an
greater
than
or
equal
90%
RCE
tests;
therefore,
meet
requirements
FL
test.
Unlike
test,
represents
experimental
conditions
laboratory
closest
reality,
evaluation
gas
industry.
several
problems
involving
corrosion,
erosion,
abrasion,
biphasic
fluids,
time
it
takes
become
effective,
duration
its
effectiveness.
Energies,
Год журнала:
2024,
Номер
17(14), С. 3588 - 3588
Опубликована: Июль 21, 2024
During
the
normal
laying
and
operation
of
a
three-core
umbilical
cable,
AC
current
can
easily
lead
to
electrochemical
corrosion
on
outer
surface
steel
tube.
To
explore
mechanism
factors
affecting
this
paper
optimizes
internal
induced
potential
calculation
method
for
cables.
It
analyzes
changes
in
characteristics
explores
variations
density
under
different
conditions.
The
research
results
show
that
by
optimizing
induction
cable’s
pipe,
electromagnetic
significance
smallest
repeating
unit,
pipe’s
exhibited
cyclic
change.
peak
part
is
most
likely
experience
corrosion.
Additionally,
reducing
radius
insulation
aperture
pipe
improving
conductivity
seawater
will
increase
aperture,
thereby
increasing
risk
As
cable
pitch
frequency
increase,
pores
also
rise.
Materials,
Год журнала:
2024,
Номер
17(16), С. 4078 - 4078
Опубликована: Авг. 16, 2024
The
effect
of
crevice
size
on
the
corrosion
N80
carbon
steel
was
investigated
by
electrochemical
measurements
and
surface
analysis
in
a
CO2-saturated
NaCl-HAc
solution.
exhibits
high
susceptibility
to
this
environment,
which
can
be
initiated
immediately
without
an
induction
period
for
specimens
with
sizes
100
μm,
300
500
μm.
Typically,
solutions
become
more
acidic
during
corrosion;
however,
study,
solution
became
alkaline,
resulting
galvanic
between
inner
outer
surfaces
leading
severe
corrosion.
pH
levels
μm
are
similar,
but
both
notably
higher
than
that
specimen
size.
As
result,
there
is
no
significant
difference
phenomenon
sizes,
it
