Journal of Electrochemical Science and Engineering,
Год журнала:
2024,
Номер
14(3), С. 297 - 320
Опубликована: Июль 16, 2024
The
corrosion
inhibition
performance
of
the
walnut
fruit
(Juglans
regia
L.)
septum
alcoholic
extract
for
Fe
B500B
steel
bars
in
a
mixed
acidic
solution
(H2SO4/HCl)
is
reported.
Weight
loss,
potentiodynamic
polarization,
and
electrochemical
impedance
spectroscopy
measurements
were
performed
at
298
to
318
K,
with
addition
various
concentrations.
Results
showed
maximum
efficiency
86.99
%
300
mg
L-1
added.
acts
as
mixed-type
inhibitor,
predominantly
affecting
anodic
side,
following
Flory-Huggins
adsorption
isotherm.
Thermodynamic
analysis
indicated
an
endothermic
process
both
chemisorption
physisorption
on
bar
surface.
Surface
characterization
was
conducted
using
ATR-FTIR,
UV-vis
SEM
techniques
prove
inhibitor
molecules
Also,
possible
mechanism
proposed.
Heliyon,
Год журнала:
2024,
Номер
10(14), С. e33748 - e33748
Опубликована: Июнь 28, 2024
Corrosion
significantly
threatens
the
structural
integrity
of
steel-based
constructions
like
buildings
and
industrial
units.
Traditional
corrosion
inhibitors,
such
as
chromates,
are
associated
with
environmental
health
risks.
This
has
led
to
a
growing
interest
in
environmentally
sustainable
alternatives,
plant
extracts
emerging
promising
candidates.
These
widely
available,
sustainable,
eco-friendly.
review
aims
explore
potential
inhibitors
for
various
types
steel.
After
examining
current
scientific
literature,
over
40
have
been
identified
that
exhibit
inhibition
properties.
thoroughly
analyzed
understand
their
effectiveness
preventing
corrosion.
The
elucidates
mechanisms
by
which
these
interact
metal
surfaces
form
protective
layers,
effectively
hindering
process.
In
this
review,
we
focus
on
challenges
utilizing
including
optimal
extract
concentration
temperature
considerations.
Arabian Journal of Chemistry,
Год журнала:
2023,
Номер
17(2), С. 105593 - 105593
Опубликована: Дек. 27, 2023
The
corrosion
of
metals
is
a
major
problem
in
many
industrial
sectors.
To
develop
sustainable
and
naturally
friendly
alternatives
to
classical
inhibitors,
the
use
plant
extracts
has
attracted
increasing
interest.
Plant
contain
variety
bioactive
substances,
such
as
polyphenols,
which
have
corrosion-inhibitory
properties.
are
biodegradable
pose
minimal
risk
human
health
ecosystems.
Consistent
with
prevailing
research
trends
this
field,
study,
ability
Hedera
helix
leaf
extract
(HHLE)
protect
XC18
steel
from
1
M
HCl
was
evaluated.
polyphenols
present
HHLE
were
identified
using
HPLC-DAD
analysis.
weight
loss,
potentiodynamic
polarization
(PDP),
electrochemical
impedance
spectroscopy
(EIS)
measurements
examined.
Six
phenolic
compounds
detected
HHLE.
results
showed
that
inhibitory
efficiency
increased
concentration.
At
298
K,
loss
tests
demonstrated
greatest
protection
92.67%
for
achieved
at
concentration
1000
mg/L
This
attributed
reduction
cathodic
currents
obstruction
active
corroding
sites.
Thermodynamic
analysis
indicated
an
endothermic
process
governed
by
physisorption,
Langmuir
adsorption
isotherm
model
highlighted
influence
both
physical
chemical
mechanisms
on
process.
Scanning
electron
microscopy
(SEM)
used
confirm
presence
Density
functional
theory
(DFT)
employed
carry
out
quantum
chemistry
studies
two
primary
components
extract:
kaempferol
(KMP)
trans-chalcone
(CHL).
parameters
obtained
calculations
explore
sites
interactions
between
donor
acceptor
molecules,
well
interfacial
mechanism
behavior
molecules
metal
surface.
