Raytheon Beech Baron E55 - Page 571

Raytheon
Aircraft
Company
BARON
55
AND
58
SHOP MANUAL
WARNING:
Always
wear
rubber
gloves
and
protective clothing
when
working
with
acids.
A
face mask
may
be
necessary,
depending
upon
ventilation
in the
area,
If
acid
accidentally
contacts
skin
or
eyes,
immediately
flush
with fresh
water
and
seek
medical advice.
REMOVAL
OF
CORROSION
FROM ALUMINUM
SURFACES
a.
Strip
all
paint
from
the
surface,
refer
to
PAINT STRIPPNG
AND
CLEANING
URETHANE
PAINT
procedures
in
this
chapter.
b.
Mechanically
remove
corrosion
by
sanding
or
rubbing
as
necessary.
c.
Inspect
the surface
carefully
to
ensure
that
sufficient
material
remains
to
satisfy
structural
requirements.
d.
Clean
the
corrosion
removed
area
with
a
chemical alkaline
cleaner.
e.
Treat
all aluminum
surfaces
with
MIL-C-5541.
1.
Rinse
the
treated
area
in COLD
running
water
and
dry
in
an oven
or
by
exposure
to
hot
air
blast.
NOTE:
If cold
running
water
is
not
available,
rinsing
may
be
eliminated and
the
area
dried
as
stated
above.
2.
Brush
2
coats
(a
minimum
of
30
minutes
apart)
of
epoxy
primer
on
and around
the reworked
area.
Assure
adequate
penetration
of
primer
into the treated
area.
ALUMINUM
CORROSION
TREATMENT
After
corrosion
removal
and
surface
cleaning,
metals should
be
given
protective
treatment
and
painted.
Alodine
treatment
of
aluminum
alloys
forms
a
protective
a
good
surface
for adhesion
of
the
paint primer.
Alodine
1299,
1200S,
1201
or
equivalent,
when mixed with
2
ounces
per
gallon
of
water,
will be
an
acceptable
treatment
material.
Mix
only
in
rubber,
plastic
or
stainless
steel
containers.
Alodine 1200 series
products
contain
fluorides
that
should
not
be
mixed
in
glass
containers.
Coat
the
area
with
the
alodine solution
and allow the
coating
to
dwell
for
approximately
five
minutes.
After the dwell time has
elapsed,
wash
the
area
with
water
and blow
dry
(do
not
wipe
dry).
Paint
the
coated
area
with
epoxy
polyamide primer
and allow
to
dry.
WARNING:
Brushes
and
cloths
should
not
be left in the
alodine
solution.
They
should
be
washed
immediately
after
use.
If
such
items
are
left
to
dry
in the
open
air,
they
create
a
fire
hazard.
I
CAUTION:
Keep
the
alodine
solution
confined
to
the
affected
area.
Mask
or
seal
all cracks and
crevices,
ail steel
pa~ts
and
any
mechanical
components.
Wash all
brushes and
cloths
immediately
after
use
to
prevent
inadvertent
contact
with
the acid solution
and
to
eliminate
a
possible
fire
hazard from
any
such
materials
that
dry
without
being
washed.
Dec
31/03Page
2
SECTION
12
E21