Journal of Magnesium and Alloys,
Journal Year:
2023,
Volume and Issue:
11(12), P. 4603 - 4618
Published: Jan. 31, 2023
It
is
a
longstanding
and
challenging
task
to
develop
sustainable
environment-friendly
cost-effective
corrosion-protection
technologies
for
Mg
alloys,
especially
under
marine
conditions
in
which
corrosion
can
normally
be
significantly
accelerated
by
bacterial
activity.
However,
this
paper
reports
on
the
of
highly
active
interestingly
inhibited
an
algal-symbiotic
bacterium
Bacillus
altitudinis.
The
presence
drastically
reduced
one
order
magnitude
after
14
days
immersion.
This
means
that
widely
available
natural
ocean
environments
may
employed
as
green
inhibitor
industry.
Based
electrochemical
measurements,
surface
analyses
microbe
experiments,
combined
inhibition
mechanism
proposed
interpret
interesting
behavior
Mg.
Microbial Biotechnology,
Journal Year:
2023,
Volume and Issue:
16(11), P. 2026 - 2035
Published: Oct. 5, 2023
Abstract
The
global
economic
burden
of
microbial
corrosion
metals
is
enormous.
Microbial
iron‐containing
most
extensive
under
anaerobic
conditions.
Microbes
form
biofilms
on
metal
surfaces
and
can
directly
extract
electrons
derived
from
the
oxidation
Fe
0
to
2+
support
respiration.
H
2
generated
abiotic
also
serves
as
an
electron
donor
for
respiratory
microbes.
metabolites
accelerate
this
oxidation.
Traditional
strategies
curbing
include
cathodic
protection,
scrapping,
a
diversity
biocides,
alloys
that
protective
layers
or
release
toxic
ions,
polymer
coatings.
However,
these
approaches
are
typically
expensive
and/or
limited
applicability
not
environmentally
friendly.
Biotechnology
may
provide
more
effective
sustainable
solutions.
Biocides
produced
with
microbes
be
less
eukaryotes,
expanding
environments
potential
application.
Microbially
surfactants
diminish
biofilm
formation
by
corrosive
microbes,
quorum‐sensing
inhibitors.
Amendments
phages
predatory
bacteria
have
been
successful
in
attacking
laboratory
studies.
Poorly
deposit
extracellular
polysaccharides
minerals
protect
surface
their
metabolites.
Nitrate
amendments
permit
nitrate
reducers
outcompete
highly
sulphate‐reducing
reducing
corrosion.
Investigation
all
mitigation
its
infancy.
More
study,
especially
relevant
conditions,
including
diverse
communities,
warranted.
npj Materials Degradation,
Journal Year:
2022,
Volume and Issue:
6(1)
Published: Jan. 25, 2022
Abstract
The
protection
of
marine
materials
against
corrosion
using
bacterial
biofilms
is
a
promising
strategy.
However,
little
known
about
the
mechanisms
this
attractive
prevention
method.
In
work,
behaviors
X80
carbon
steel
(CS)
in
presence
three
different
Vibrio
species
were
studied.
results
demonstrated
that
all
spp.
displayed
significant
with
weight
loss
reduction
up
to
68%.
Moreover,
their
performance
was
tightly
related
abilities
form
biofilms,
which
order
sp.
EF187016
>
alginolyticus
parahaemolyticus
.
To
further
investigate
mechanism
caused
by
extracellular
polymeric
substances
(EPS)
extracted
and
added
3.5
wt%
NaCl
for
abiotic
testing.
suggested
EPS
inhibited
corrosion,
means
can
play
role
biofilm.
Journal of Materials Research and Technology,
Journal Year:
2023,
Volume and Issue:
24, P. 5839 - 5863
Published: April 23, 2023
The
effect
of
sulfate-reducing
bacteria
(SRB)
on
the
corrosion
behavior
X80
steel
welded
joint
in
a
soil
solution
was
studied.
results
indicated
that
SRB
enhanced
joint.
heat
affected
zone
(HAZ)
quite
different
from
those
weld
metal
(WM)
and
base
(BM).
HAZ
an
active
region
could
be
preferentially
more
quickly
corroded.
Macro-galvanic
had
significant
MIC
joint,
leading
to
preferential
HAZ.
