Polymers,
Год журнала:
2023,
Номер
15(8), С. 1967 - 1967
Опубликована: Апрель 21, 2023
In
this
work,
a
tetrafunctional
epoxy
resin
entitled
2,3,4,5-tetraglycidyloxy
pentanal
(TGP)
was
tested
and
investigated
as
potential
corrosion
inhibitor
for
mild
steel
(MS)
in
0.5
M
H2SO4
solution.
The
inhibition
process
employed
alongside
various
techniques,
such
potentiodynamic
polarization
(PDP),
electrochemical
impedance
spectroscopy
(EIS),
temperature
effect
(TE),
scanning
electron
microscopy
(SEM),
energy-dispersive
X-ray
(EDS)
theoretical
approaches
(DFT,
MC,
RDF
MD).
Further,
the
efficacies
obtained
at
optimum
concentration
(10-3
of
TGP)
were
85.5%
(EIS)
88.6%
respectively.
PDP
results
indicated
that
TGP
acted
same
an
anodic
type
SEM
EDS
analyses
found
protective
layer
formed
on
MS
electrode
surface
presence
could
prevent
attack
sulfur
ions.
DFT
calculation
provided
more
information
regarding
reactivity,
geometric
properties
active
centers
inhibitory
efficiency
resin.
RDF,
MC
MD
simulations
showed
have
maximum
International Journal of Electrochemical Science,
Год журнала:
2024,
Номер
19(5), С. 100547 - 100547
Опубликована: Март 20, 2024
In
this
paper,
four
quinoline
quaternary
ammonium
salts
were
synthesized
using
quaternization
reaction,
which
benzyl
quinolion
(BQL),
naphthylmethyl
quinolinium
chloride
(NQL),
benzyl-8-hydroxy
(BHQ)
and
8-hydroxy
(NHQ).
The
corrosion
inhibition
properties
of
the
derivatives
as
inhibitors
on
P110
steel
in
20%
HCl
solution
at
60°C
different
concentrations
investigated
by
weight
loss
electrochemical
measurements.
results
showed
that
concentration
inhibitor
increases,
rate
decreased
efficiency
improved.
Among
various
same
concentration,
their
efficiencies
can
be
ranked
from
lowest
to
highest
follows:
QL(quinoline)<8-HQ(8-hydroxyquinoline)
Arabian Journal of Chemistry,
Год журнала:
2022,
Номер
15(6), С. 103849 - 103849
Опубликована: Март 25, 2022
Natural-based
corrosion
inhibitors
have
gained
great
research
interest
thanks
to
their
low
cost
and
higher
performance.
The
Cupressus
arizonica
fruit
essential
oil
(CAFEO)
has
a
extraction
yield
than
leaves;
however,
it
less
antibacterial
antifungal
activities.
three
main
components
in
the
CAFEO
were
α-pinene
(51.07%),
myrcene
(17.92%),
limonene
(9.66%).
Essential
oils
with
percentage
of
found
outstanding
inhibition
properties.
Therefore,
herein,
was
investigated
as
green
inhibitor
for
carbon
steel
(CS)
1.0
mol/L
HCl
using
electrochemical,
i.e.,
potentiodynamic
polarization
(PDP)
electrochemical
impedance
spectroscopy
(EIS),
scanning
electron
microscope
(SEM)
techniques.
experimental
results
revealed
that
successfully
inhibited
solution.
Results
from
PDP
indicated
had
mixed-type
effect
predominance
cathodic
character.
EIS
data
showed
charge
transfer
resistance
CS
electrode
increased
20.9
Ω
cm2
blank
solution
294.5
0.5
g/L
at
298
K,
leading
significant
decrease
double
layer
capacitance
values
an
efficiency
(η%)
93%.
high
temperatures
negative
on
tested
inhibitor.
At
323
η%
decreased
77%.
Besides,
SEM
images
formed
protective
barrier
against
acid
attack,
preventing
corrosion.
Theoretical
calculations
by
Density
Functional
Theory
(DFT)
performed
investigate
reactivity
CAFEO.
