Abstract
The
corrosion
inhibition
properties
of
two
inhibitors,
2-Amino-4-(4-chlorophenyl)-3-cyano-7,7-dimethyl-5-oxo-4H-5,6,7-tetrahydrobenzo[b]
pyran
(ZE1-4-Cl)
and
2-Amino-3-cyano-4-(4-nitrophenyl)-7,7-dimethyl-5-oxo-4H-5,6,7,8-tetrahydrobenzo[b]
(ZE2-4-
NO2),
on
mild
steel
in
a
1.0
M
HCl
solution
was
evaluated
using
Tafel
polarization
Electrochemical
Impedance
Spectroscopy
(EIS).
inhibitory
efficiency
increases
with
decreasing
temperature.
Additionally,
the
also
increasing
inhibitor
concentration.
Notably,
better
NO2)
achieves
an
93.7%
at
temperature
298
K
optimal
concentration
10−
3M.
adsorption
both
inhibitors
surface
found
to
follow
Langmuir
model,
study
shows
that
compounds
are
adsorbed
metal
through
chemical
bonding
(chemisorption)
following
isotherm.
experimental
results
reveal
these
organic
effective
solution.
SEM
Energy
Dispersive
X-Ray
Analysis
(EDS)
were
employed
confirm
presence
barrier
layer
enveloping
steel,
contributing
characterization.
interactions
iron
primarily
facilitated
by
possessing
electron-accepting
properties,
as
evidenced
DFT
molecular
dynamic
(MD)
simulations.
Coatings,
Journal Year:
2024,
Volume and Issue:
14(1), P. 77 - 77
Published: Jan. 5, 2024
The
growing
interest
in
eco-friendly
alternatives
has
sparked
research
into
essential
oils
as
corrosion
inhibitors,
offering
an
innovative
approach.
Investigating
their
unique
properties,
researchers
aim
to
advance
engineering
for
a
sustainable
future.
Despite
promising
lab
results,
the
exact
mechanism
of
action
is
not
fully
understood,
highlighting
need
further
exploration.
Using
computational
modeling,
we
explored
how
grape
seed
oil
(GSO)
compounds
interact
with
carbon
steel
(C38)
surfaces,
unraveling
inhibitive
properties
against
corrosion.
Employing
various
simulation
methods,
such
density
functional
theory
(DFT),
functional-based
tight-binding
(DFTB),
and
molecular
dynamics
(MD),
this
study
validates
experimental
findings
unveils
novel
insights
underlying
mechanisms
these
interactions.
Quantitative
analysis
quantifies
inter-
intramolecular
synergistic
effect
suggests
that
LA@OA
promotes
charge-transfer
process.
DFTB
calculations
reveal
parallel
adsorption
configuration
LA
OA
molecules
sufficiently
strong
form
stable
layer
on
Fe
surface
large
negative
value
Eads
(6.74
eV).
Experimental
results
demonstrated
inhibition
performance
GSO
extract
exhibited
notable
increase
increasing
concentrations,
reaching
higher
efficiency
79%
at
0.5
g/L
GSO.
EIS
existence
inhibitor
film
increases
resistance
charge
transfer
(about
80
Ω
cm2
g/L),
indicating
superior
barrier
anticorrosion
formed
film.
theoretical
validate
exceptional
provide
compelling
evidence
remarkable
ability
prevent
C38
substrate.
offer
potential
pathways
development
interestingly
foundation
understanding
field.
Metals,
Journal Year:
2024,
Volume and Issue:
14(1), P. 69 - 69
Published: Jan. 6, 2024
Green
corrosion
inhibitors
are
gaining
recognition
for
their
sustainable,
cost-effective,
and
environmentally
friendly
nature,
along
with
impressive
water
solubility
high
inhibition
efficiency.
They
offer
a
promising
solution
to
combat
issues
that
plague
various
industries.
However,
harness
the
full
potential
of
these
eco-friendly
inhibitors,
profound
understanding
development
underlying
mechanisms
is
essential.
This
knowledge
key
paving
way
next
generation
protection
materials.
Herein,
comprehensive
study
was
conducted
understand
adsorption,
efficiency,
stability
3-benzoyl-4-hydroxy-2,6-bis(4-methoxyphenyl)-4-phenylcyclohexane-1,1-dicarbonitrile
(BMPD).
investigated
performance
BMPD
applied
carbon
steel
(CS)
in
1
M
hydrochloric
acid
(HCl)
solution.
The
effect
examined
using
weight
loss,
potentiodynamic
polarization
(PDP),
electrochemical
impedance
spectroscopy
(EIS),
theoretical
studies.
surface
morphology
also
characterized
Tafel
analysis
shows
mixed
inhibitor.
results
obtained
by
indicate
inhibitory
increases
increasing
inhibitor
concentration.
adsorption
on
CS
obeyed
Langmuir
isotherm.
Thermodynamic
parameters
were
calculated
discussed.
Furthermore,
this
involved
computational
compound.
Using
quantum
chemical
calculations
first-principle
simulations,
we
delved
into
structural
electronic
properties
as
well
interfacial
between
studied
molecule
iron
surface.
Materials,
Journal Year:
2024,
Volume and Issue:
17(5), P. 1176 - 1176
Published: March 2, 2024
Growing
research
activity
on
layered
double
hydroxide
(LDH)-based
materials
for
novel
applications
has
been
increasing;
however,
promoting
LDH
layer
growth
and
examining
its
morphologies
without
resorting
to
extreme
pressure
conditions
remains
a
challenge.
In
the
present
study,
we
enhance
morphology
examination
conditions.
By
synthesizing
Mg-Al
directly
plasma
electrolytic
oxidation
(PEO)-treated
Mg
alloy
surfaces
pores
at
ambient
pressure,
direct
synthesis
was
achieved
feasibly
autoclave
requirements,
employing
suitable
chelating
agent.
Additionally,
enhancing
corrosion
resistance
involved
incorporating
electron
donor–acceptor
compounds
into
protective
layer,
with
8-Hydroxyquinoline-5-sulfonic
acid
(HQS)
that
helps
in
augmenting
through
combination
of
ion-exchange
ability
organic
layer.
DFT
simulations
were
used
explain
mutual
interactions
system
provide
theoretical
knowledge
interfacial
process
molecular
level.
ACS Omega,
Journal Year:
2024,
Volume and Issue:
9(13), P. 15015 - 15029
Published: March 19, 2024
The
effectiveness
of
a
copper(II)
complex
with
Schiff
base
derived
from
2-amino-4-phenyl-5-methylthiazole
and
salicylaldehyde
(APMS)
as
corrosion
inhibitor
for
XC18
steel
in
an
HCl
solution
was
investigated.
Experimental
findings
indicated
slight
negative
correlation
between
inhibition
efficiencies
1
M
temperature
but
positive
both
concentration
immersion
time,
respectively.
weight
loss
measurement
revealed
that
APMS
achieved
maximum
rate
92.07%
at
303
K.
A
fitting
analysis
demonstrated
adheres
to
the
Langmuir
adsorption
isotherm.
electrochemical
results
enhanced
inhibitive
performance
APMS,
efficiency
increasing
concentrations
increased,
ultimately
reaching
peak
94.47%
5
×
10–3
mol
L–1.
Potentiodynamic
polarization
measurements
acted
mixed-type
without
affecting
mechanism.
Scanning
electron
microscopy
investigations
metal
surfaces
corroborated
presence
adsorbed
organic
layer.
Advanced
theoretical
calculations
utilizing
density
functional
theory
first-principles
density-functional
tight-binding
were
conducted
gain
insights
into
behavior
on
surface.
derives
its
advantages
crucial
inter-
intramolecular
interactions,
resulting
formation
resilient
layer,
line
experimental
findings.
It
is
found
APMS-based
exhibits
significant
synergistic
effect.
current
study
offers
design
direction
enhancing
structural
characteristics
complexes,
laying
groundwork
multifunctional
frameworks
minimize
rates
considerations
real-world
use
cost-efficiency.
ability
replace
harmful,
expensive
constituents
sustainable,
cost-effective
alternatives
represents
outcome
this
study.
