Jurnal Kimia Sains dan Aplikasi,
Год журнала:
2024,
Номер
27(12), С. 569 - 579
Опубликована: Дек. 19, 2024
This
research
investigates
the
thermodynamic
characteristics
of
chitosan
as
a
corrosion
inhibitor
for
carbon
steel
in
chloride
electrolyte
environments,
specifically
saturated
sodium
and
1
M
hydrochloric
acid,
across
different
temperatures
concentrations.
The
study
aimed
to
evaluate
effectiveness
preventing
examine
adsorption
process.
results
revealed
that
achieved
highest
inhibition
efficiency
90.07%
acid
solution
with
concentration
250
mg/L
at
303.15
K.
In
contrast,
maximum
was
50.50%
same
Thermodynamic
analysis
showed
is
spontaneous
exothermic
both
media.
standard
free
energy
found
be
-38.63
kJ/mol
K,
decreasing
-43.69
343.15
K
NaCl,
-42.40
-48.65
HCl.
enthalpy
-0.24976
NaCl
4.93560
HCl,
while
entropy
-0.12661
J/mol·K
-0.15610
Additionally,
activation
increased
from
1.61
0
6.96
4.10
23.79
SEM
confirms
formation
protective
film,
significantly
reducing
damage
compared
uninhibited
conditions.
These
findings
indicate
highly
effective
favorable
applications
chloride-containing
environments.
Frontiers in Chemistry,
Год журнала:
2024,
Номер
12
Опубликована: Июнь 13, 2024
The
deterioration
of
mild
steel
in
an
acidic
environment
poses
a
significant
challenge
various
industries.
emergence
effective
corrosion
inhibitors
has
drawn
attention
to
studies
aimed
at
reducing
the
harmful
consequences
corrosion.
In
this
study,
inhibition
efficiency
Prinivil
1M
HCl
solution
through
electrochemical
and
gravimetric
techniques
been
investigated
for
first
time.
results
demonstrated
that
expanded
from
61.37%
50
ppm
97.35%
500
concentration
298
K.
With
regression
coefficient
(
R
2
)
0.987,
K
ads
value
0.935
E
43.024
kJ/mol
inhibitor,
strong
affinity
adsorption
onto
metal
surface
significantly
found.
Scanning
electron
microscopy
(SEM)
contact
angle
measurement
analyses
further
support
inhibitory
behavior
Prinivil,
demonstrating
production
defensive
layer
on
steel.
Additionally,
molecular
dynamics
(MD)
Monte
Carlo
simulations
were
employed
investigate
stability
interactions
between
metallic
(Fe
(1
1
0))
atomic
level.
computed
reveal
upon
surface,
confirming
its
viability
as
inhibitor.
International Journal of Electrochemical Science,
Год журнала:
2023,
Номер
19(1), С. 100449 - 100449
Опубликована: Дек. 21, 2023
The
present
study
aimed
to
synthesize
and
investigate
the
inhibitory
effects
of
two
novel
Schiff
bases
namely:
(Z)-1-(5-nitro-2-oxoindolin-3-ylidene)
semicarbazide
(NOSC)
Z)-1-(5-nitro-2-oxoindolin-3-ylidene)
thiosemicarbazide
(NOTSC)
for
carbon
steel
(CS)
corrosion
in
0.5
M
H2SO4
medium.
Through
chemical
electrochemical
investigations,
efficiency
NOSC
NOTSC's
inhibition
was
ascertained
experimentally
at
298
K.
It
is
noteworthy
that
efficacy
NOTSC
reached
93.4%
91.6%,
respectively,
a
concentration
10-3
M.
Studies
using
potentiodynamic
polarization
revealed
functioned
as
mixed-type
inhibitors.
A
depressed
capacitive
loop
with
varying
concentrations
primary
way
Nyquist
plot
impedance
represented.
transportation
corrosive
ions
metal
substrate
impeded
by
adsorption
both
NOTSC,
determined
Langmuir
isotherm.
Apart
from
additional
insights
were
gained
into
mechanism
application
density
functional
theory
(DFT),
molecular
dynamics
simulation
(MDS),
an
understanding
structure
NOSC.
robust
correlation
discovered
between
theoretical
experimental
results
through
DFT/MDS
computational
study.
