ACS Omega,
Год журнала:
2024,
Номер
9(13), С. 15015 - 15029
Опубликована: Март 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.
Anti-Corrosion Methods and Materials,
Год журнала:
2024,
Номер
71(2), С. 167 - 178
Опубликована: Янв. 19, 2024
Purpose
The
aim
of
this
study
was
to
investigate
the
activity
4-((4-((2-hydroxyethyl)(methyl)amino)benzylidene)
amino)-1,5-dimethyl-2-phenyl-1,2-dihydro-3
H
-pyrazol-3-one
(HEMAP),
a
Schiff
base
synthesized
and
characterized
for
first
time,
authors’
knowledge,
as
novel
inhibitor
against
corrosion
mild
steel
(MS)
in
hydrochloric
acid
solution.
Design/methodology/approach
HEMAP
by
some
spectroscopic
methods
including
High-Resolution
Mass
Spectrometry
(HRMS),
Proton
Nuclear
Magnetic
Resonance
(1H
NMR),
Carbon-13
(C13)
nuclear
magnetic
resonance
(13C
NMR)
Fourier
Transform
Infrared
Spectroscopy
(FT-IR).
Then,
inhibition
efficiency
on
MS
solution
investigated
potentiodynamic
polarization
electrochemical
impedance
spectroscopy
(EIS).
To
explain
mechanism,
surface
charge,
adsorption
isotherms
thermodynamic
parameters
were
studied.
Findings
EIS
tests
displayed
that
highest
calculated
approximately
99.5%
5
×
10
−2
M
1
HCl
found
be
compatible
with
Langmuir
model
isotherm.
parameter
results
showed
standard
free
energy
more
chemical
than
physical.
Originality/value
This
is
important
terms
demonstrating
performance
molecule
an
acidic
media.
