American Journal of Applied Chemistry,
Год журнала:
2024,
Номер
12(6), С. 135 - 148
Опубликована: Дек. 12, 2024
Organic
inhibitors
are
crucial
for
preserving
metals
from
corrosion
in
acidic
environments.
In
this
regard,
the
methyl
4-(((1-H
benzo[d]imidazol-2-yl)methyl)thio)methyl)benzoate
(M-41HBI-2MTMB)
was
synthesized
and
investigated
as
an
eco-friendly
inhibitor
aluminum
a
molar
nitric
acid
solution
(1
M
HNO<sub>3</sub>).
The
gravimetric
technique
used
to
study
inhibitory
properties
of
molecule,
density
functional
theory
(DFT)
conducted
elucidate
inhibition
mechanism.
experimental
data
indicated
that
M-41HBI-2MTMB
reduced
metal
with
significant
efficiency.
increased
increase
concentration
reaching
efficiency
98.5%
at
5.10<sup>-3</sup>
M,
temperature
298
K.
Adsorption
isotherms
thermodynamic
parameters
were
studied
interactions
between
surface.
adsorbed
spontaneously
onto
surface
following
Villamil
model
(modified
Langmuir
isotherm).
Additionally,
Gibbs
free
energy
less
than
-
40
kJ.mol<sup>-1</sup>
negative
value
enthalpy
adsorption
suggested
mixed-type
predominance
physical
interactions.
theoretical
findings
DFT
calculations
revealed
positive
fraction
electrons
transferred
(<i>ΔN
=
0.247
eV</i>),
high
electrophilicity
index
(<i>ω
3.807
eV</i>)
well
low
gap
(<i>ΔE
4.478
showing
favorable
its
environment.
active
sites
molecule
highlighted
level
carbon
atoms,
mechanism
proposed.
International Journal of Electrochemical Science,
Год журнала:
2023,
Номер
18(11), С. 100336 - 100336
Опубликована: Сен. 2, 2023
5052
Al
alloy
commonly
used
for
construction
structures
was
anodized
from
the
mixed
acid
electrolyte
of
citric
and
sulfuric
to
further
improve
durability
components.
Different
aluminum
alloys
were
prepared
by
changing
concentration
in
electrolyte.
The
surface
morphology,
structure,
thickness
corrosion
resistance
characterized
analyzed.
results
show
that
adding
appropriate
amount
has
a
certain
inhibition
effect,
which
reduces
dissolution
degree
alloy.
At
same
time,
is
beneficial
increase
alloy,
resulting
enhancement
simulated
rain.
When
70
g/L,
uniform
with
higher
better
Coatings,
Год журнала:
2025,
Номер
15(4), С. 439 - 439
Опубликована: Апрель 8, 2025
The
adoption
of
chrome-free
anodizing
and
sealing
systems
for
aluminum
alloys,
particularly
AA2024,
is
gaining
prominence
due
to
environmental
health
concerns
associated
with
traditional
Cr(VI)-based
processes.
This
study
evaluates
the
economic
impacts
sulfuric
acid
(SAA)
combined
based
on
fluorozirconate,
molybdate,
cerate.
Comparative
analyses
were
conducted
against
conventional
Cr(VI)
SAA
Cr(III)
sealing,
focusing
corrosion
resistance,
energy
consumption,
washing
steps
material
flows.
entire
process
was
examined,
including
pretreatment,
anodization,
sealing.
Electrochemical
surface
characterization
through
SEM/EDS,
FIB,
XPS
conducted.
results
demonstrate
that
chromium-free
system
offers
competitive
resistance
while
significantly
reducing
costs.
Furthermore,
cerate-based
post-treatments
broaden
its
application
spectrum
in
science
warrant
further
exploration.
However,
adopting
new
technologies
aerospace
requires
extensive
certification
involving
durability
assessments,
stringent
simulations.
Compliance
regulatory
standards
set
by
FAA
(Federal
Aviation
Administration)
EASA
(European
Union
Safety
Agency)
necessitates
thorough
documentation,
third-party
validation,
testing
ensure
safety
performance
before
industrial
implementation.
These
challenges
underscore
complexity
transitioning
more
sustainable
industry.
Coatings,
Год журнала:
2024,
Номер
14(6), С. 733 - 733
Опубликована: Июнь 8, 2024
Tartaric-sulfuric
acid
anodic
(TSA)
films
were
prepared
on
the
surface
of
2024
Al
alloy.
These
sealed
with
cerium
salts
at
25
°C
and
65
°C,
hot
water,
dichromate.
The
morphology
corrosion
resistance
investigated
using
a
field
emission
scanning
electron
microscope/energy-dispersive
spectrometer,
an
electrochemical
workstation,
acidic
spot
test,
immersion
test.
results
indicated
that
TSA
film
salt
had
slightly
lower
content
compared
to
°C.
It
was
found
increasing
sealing
temperature
could
enhance
film.
After
in
3.5
wt.%
NaCl
solution
for
336
h,
no
obvious
pits
observed
whereas
many
larger
appeared
improved
be
attributed
synergistic
effect
oxide
deposition
hydration
reaction.
significantly
better
than
but
it
still
IntechOpen eBooks,
Год журнала:
2024,
Номер
unknown
Опубликована: Фев. 23, 2024
Cerium
oxide
materials
exhibit
remarkable
properties,
positioning
them
as
highly
effective,
environmentally
friendly
solutions
across
diverse
applications.
This
chapter
provides
a
comprehensive
overview
of
fundamental
concepts
and
technological
methodologies
related
to
cerium
(CeO2)
doped
ceria-based
materials.
Emphasis
is
placed
on
electrochemical
deposition,
spray
pyrolysis,
the
sol-gel
approach
for
synthesizing
thin
thick
layers
ceria.
The
versatility
these
explored,
spanning
from
corrosion
protection
specialized
ceramic
elements
sensor
applications
components
solid
fuel
cells
(SOFCs)
electrodes
water-splitting
cells.
Additionally,
delves
into
promising
recently
developed
nanomaterials
in
various
fields,
marking
some
advanced
methods
CeO2-based
synthesis.
key
findings
are
succinctly
summarized
concluding
section.
Materials and Corrosion,
Год журнала:
2024,
Номер
75(10), С. 1373 - 1388
Опубликована: Май 18, 2024
Abstract
The
crevice
corrosion
behavior
and
mechanism
of
AA7075‐T651
aluminum
alloy
was
investigated
by
electrochemical
measurements
surface
analysis
technologies
in
a
neutral
nitrate
solution
with
different
contents
NaCl.
Cl
−
identified
as
crucial
for
the
initiation
development
corrosion,
phenomenon
absent
0.05
M
NaCl
but
initiated
0.5
1
solutions.
However,
more
pronounced
due
to
establishment
larger
galvanic
effect.
rapid
dissolution
anodic
phase
resulted
increased
inside
crevice,
while
cathodic
enhanced
localized
through
micro‐galvanic
corrosion.
This
synergistic
effect
significantly
facilitated
