IT-C-520B
CANCELLATION
October 5, 1988
FEDERAL SPECIFICATION
COATING COMPOUND, BITUMINOUS, SOLVENT’
TYPE, UNDERBODY
(FOR M3TOR VEHICLES)
This cancellation is approved by the Ccmdssioner,
Office of Federal Supply and Services, General
Services Achninistration.
Federal Specification TT-C-520B, dated February 25, 1973 is hereby canceled
and replaad by MIL-C-62218A, Corrosion Preventive Compounds, Cold Application
(For New and Fielded Motor Vehicles and Trailers), Type II - For fielded
v
Note from the webmaster:
MIL-C-62218A has been replaced by MIL-PRF-62218B;
MIL-PRF-62218B has been replaced by A-A-59295.
ehicles and Trailers.
DISTRIBUTION
unlimited*
STATEMENT A:
Approved
STORAGE: Most adhesives are temperature sensitive and
should be stored in a temperature and humidity controlled
depets. Unless otherwise specified on the package label or
marking, temperatures shall not exceed 60” F (15.6° C) and
the relative humidity shall not exceed 50 percent.
*US,
GOVERNMENT
PRINTING OFFICE:
1988
- 240-963/96613
●
TT.c-520B
February p, 1973
SUPERSEDING
Fed. Spec. TT-C-520A
June G, 1963
FEDERAL SPECIFICATION
COAT NG COMPOUND, BITUMINOUS,”
SOLVENT
UNDER60DY, (FOR MOTOR VEHlcLEs)
TYPE,
This
specification
Service,
General
was approved
by the
Services
Administration,
Commissioner,
for
the
Federal
use
of
all
Supply
Federal
agencies.
SCOPE AND CLASSIFICATION
1.
1.1
use
a
use
1.2
be of
coating
AIR
APPLICABLE
composition
G L -
General
Limited
an asphalt
deadener
two
REGULATIONS
Coating
following
covers
sound
provides
POLLUTION
Classification.
the
and
It
equipment.
under
Composition
Composition
2.
specification
protective
automotive
for
This
Scope.
as
use.
use (see
compound
the
compositions
(see
suitable
underbody
one
of
which
for
of
parts
is
suitable
6.7).
covered
specified:
compound
as
on
by this
specification
shall
6.7).
DOCUMENTS
The following documents, of the issues in effect on date of invitation for
2.1
bids or request for proposal, form a part of this specification to the extent
specified herein:
Federal
Specifications:
QQ-A-250/4
QQ-C-576
(IQ-s-698
PPP-C-96
PPP-D-729
-
PPP-P-704
-
Aluminum
Alloy
2024 Plate
and Sheet.
Copper,
Flat
Products
(Plate,
Bar,
Sheet
and Strip).
Sheet
and Strip,
Low Carbon.
Steel,
Cans; Metal , 28 Gage and Lighter.
Drums: Metal,
55-Gallon
(For Shipment
of Noncorrosive”
Material).
Shipping,
Steel
(1 through
12 Gallon).
Pails:
FSC
8030
TT-c-520B
Federal
Standards:
Fed.
Fed.
(Activit
Specificat
123 -
Marking
Std.
No.
Test
Method
Std.
Materials;
for
-
Shipment
Paint,
Varnish,
of
Inspection,
is
U.S.
(Single
for
sale
on
Government
copies
required
by
are
available
Offices
in
of
and Standards
and
includes
cumulative
a subscription
Printing
Office,
this
outside
without
charge
Boston,
New York,
and
the
at
basis
by the
Washington,
specification
activities
other
Federal
agencies).
(civil
Lacquer,
Sampling,
es outside
the
Federal
Government
may obtain
ons and Standards
as outl ined
under
General
Index
of Federal
Specifications
in the
Index.
The
Index,
which
issued,
ments,
Domestic
No.
141
Methods
and Related
and Testing.
copies
of
Information
Federal
in the
ndicated
ements
as
the prices
monthly
supp
of
Supel-intenden
D. C. 20402.
product
Government
specifications
for
at the General
Services
Washington,
DC.,
Atlanta,
Docu-
bidding
purposes
Adrninistration
Chicago,
Regional
Kansas City,
Fort Worth, Denver, San Francisco, Los Angeles, and Seattle, WA.
(Federal
Government
and Standards
established
Military
activities
and the
distribution
MIL-STD-105
-
Sampling
Attributes.
MI L-STD-147
-
Palletized
MI L-STD-290
-
(Copies
of
connection
the
2.2
Military
with
procuring
Other
the
Society
217 -
(Applications
Testing
and
2
the
issue
in effect
shall
apply.
D
of
Federal
and
Cone
for
Materials,
Procedures
and
Tables
for
Specifications
Standards
from
Inspection
or
as
on
directed
The
extent
for
Penetration
the
following
date
of
Testing
copies
by
specified
the
by
x 48”
(
Pallets,
and
Products.
Specifications
and Standards
specific
procurement
functions,
publications.
to
American
copies
and Containerized
Unit
Loads
40”
Runners,
or Pallet
Type
Base
Skids,
Packaging,
Packing,
and Marking
of Petroleum
agency
specification
posal
obtain
Federal
Specifications
in their
agencies.)
Standards:
Related
in
may
Index
of
points
of
should
1916 Race
contracting
document
herein.
invitation
and
required
should
Materials
Lubricating
by contractors
obtained
from
officer.)
forms
Unless
for
be
bids
(ASTM)
a part
otherwise
or
request
of
this
indicated,
for
pro-
Society
for
Standard
Grease
be addressed
to the
Street,
Philadelphia,
American
PA
19103.)
TT-C-520B
REQUIREMENTS
3.
3.1
be
Qualification.
a product
Products
Any
which
List
change
requal
within
at
in
is
the
the
ification.
manufacturing
3.2
time
fillers
set
formulation
The
Composition
solvents,
The compound
qualified
for
for
opening
of
a qualified
material
tolerances
supplied
to the
requirements.
and
furnished
listing
The
additives
under
this
specification
the applicable
Qualified
on
of
bids
(see
product
under
product
contract
receiving
compound
processed
4.4.2.1
will
to
shall
meet
and
shall
6.3).
necessitate
its
shall
be identical
qualification.
be
the
a mixture
of
requirements
asphalts,
of
this
specification.
3.2.]
Asphalts.
residuum
from
occurring
3.2.2
vacuum
may
be
The
volatile
shall
be
conform
L.
to
the
further
of
volatile
following
by
air-blowing
petroleum
or
the
naturally
processed.
portion
The
produced
distillation
of
the
petroleum
hydrocarbon
solvent
or
hydrocarbons
or other
solvents
Composition
also
used
asphalts
or
which
Solvents.
3.2.2.1
compound
solvents.
of a highly
content
of
requirements
shall
it
consist
shall
toxic
nature.
composition
by
volume
of
contain
L compounds
when
tested
as
4.6.3.
in
(a)
benzene:
Aromatic
compounds
8 percent
maximum.
(b)
(d)
Total
3.2.3
tos
and
s, nd and
tative
of
a+b:
Fillers.
fiber
3.3
with
Ethyl
benzene,
toluene
Solvents
with
an olefinic
6.8).
test
(see
(c)
negative
t
steam
bitumens
any suitable
no chlorinated
shall
The
the
other
fine
harsh
Quantitative
requirements
20
requirements.
of Table
and
or
more
carbon
branched
ketones:
or cyclo-olefinic
percent
The fillers
inert
mineral
abrasive
eight
20
type
except
ethyl
percent
maximum.
of unsaturation:
maximum.
shall
be short
which
shall
material
atoms
shall
asbestos
fiber
or short
pass
throuqh
a 325-mesh
not
The compound
I when tested
as
be
asbessieve.
usej.
shall
conform
in 4.6.
to
the
quan-
3
TT-c-520B
TABLE
1.
Quantitative
requirements
Requirements
Characteristics
Total
Minimum
solids,
Filler,
Weight
percent
percent
by
per gallon,
Flash
point,
to
of
of
compound
60
--
--
25
nonvolatile
100
millimeters
air
--
S2.O
dry,
38.5
hours:
touch
Practical
9.5
8.o
“F.
Consistency,
Drying
time,
Set
by weight
volume
pounds
Maximum
hardness~l
I/The
coating
is considered
—
pressure
between
the
thumb
but
the
film
is not
ruptured
to have
reached
practical
and the
finger
and none of
hardness
--
4
--
24
when
firm
shows a slight
tacky
condition,
the
coating
adheres
to the
finger.
3.4
Qualitative
3.4.1
show
Condition
little
curdling,
lumps or
3.4.2
tainer
or
no
livering,
skins.
in
in
vehicle
the
When
after
compound,
tested
a freshly
as
opened
separation,
Storage stability.
of
When
container.
settling
or
tested
4.6.8,
and
4.6.9,
in
the
compound
container,
caking,
as
six-months
in
full
shall
be
a full
shall
storage,
shall
shall
show
free
no
from
one-gallon
conthe
requirements
meet
3.4.3.
of
3.4.3
Spraying
continuous,
uniform,
surface.
3.4.4
Sag
test.
when suspended
be no flowing
3.4.5
Acid
shall
show
by solvent
3.4.6
steel
The
,
and
Corrosion.
and
properties.
and
When
or
tested
any
pinho”
ing
in
4.6.11
as
resistance.
attack
by
panel
The
compound,
aluminum.
strips
compound,
The
the
The
strips
heated
tested
steel
shall
but
fluids.
shall
as
strips
show
not
4.6.1o,
in
would
compound
shall
expose
shall
tested
as
the
in
be
in
4.6.13,
no more
immersed
shall
show
staining
in
the
no
not
trace
and
metal
sag
There
On removal
of
free
from
pitting
shall
be
the
not
after
spraying.
the
lower
half
of
compound,
test
surface
as
that
the
for
1 hour
immediately
up of the
coating
on
the
aluminum
prepared
from
tested
alkali
of
The
free
vertically
and piling
no signs
cleaning,
copper,
copper
similarly
4
requirements.
4.6.12,
the
or
coating
rusting.
corrode
of
corrosion.
corrosion
compound.
shall
panel.
than
I
TT-c-520B
3.4.7
shall
is
Fire
not
resistance.
support
The
combustion
compound,
for
more
tested
than
as
15
4.6.14,
in
seconds
after
may
the
char
but
flame
source
removed.
3.4.8
as
in
Resistance
4.6.15,
3.4.9
show
surface
at
flow
of
blistering
shall
be
free
from
3.4.11
not be
flake,
or
Abrasion
through
cut
temperature.
The
compound,
On
lifting.
pitting
and/or
adhesion.
chip
from
resistance.
to bare
metal
The
compound,
tested
creep.
or
Cold-temperature
loosen,
elevated
or
resistance.
signs
3.4.10
The
at
as
of
in
4.6.16,
the
shall
coating
the
steel
rusting.
The
more
tested
removal
than
compound,
tested
as
5 percent
of
total
compound,
any point.
tested
the
as
in
4.6.17,
4.6.18,
in
shall
area.
shall
QUALITY ASSURANCE PROVISIONS
4“
4.1
tract
Responsibility for
or
all
purchase
inspection
fied,
in
right
order,
contract
or
suitable
unless
to
4.2
Lot.
perform
4.3
as
is
specified
the
order,
any
of
the
from
of
one
the
Except
may
use
as
his
set
and
offered
to
forth
testing,
for
a
otherwise
the
that
or
conof
speci-
any
other
specification
supplies
lot
delivery
the
requirements
speciGovernment
reserves
in
assure
in
performance
own
of the
inspection
The
Government.
inspections
sampling
batch
specified
for
herein.
supplier
are
deemed
necessary
prescribed
requirements.
purposes
otherwise
responsible
shall
at
one
and
consist
of
time.
Sampling.
4.3.1
filled
tion
For
coating
Unless
supplier
for
the
performance
disapproved
by the
where
such
inspections
services
conform
to
underbody
inspection.
the
requirements
the
facilities
fied
herein,
the
flow
not
Salt-spray
no
not
to
shall
Sampling
containers
level
1 and
verify
compliance
other
requirements
4.3.2
Sampling
ers
shall
be
samples
shall
tainers
laboratory.
and
for
with
not
for
selected
be taken
then
inspection
shall
be
acceptable
sealed,
this
of
selected
quality
filled
specification
involving
tests.
in
A
with
to 2.5
regard
to
each
inspection
From each
of the
lot
two
random
sample
of
MIL-STD-105
at
percent
defective
inspecto
fill,
and
closure,
tests.
From
at random.
and. placed
marked,
containers.
in accordance
level
equal
in
and
separate
forwarded
clean
to
4.2)
(see
containers,
dry
the
metal
designated
or
two
containl-quart
glass
testing
con-
TT-c-520B
4.4
Inspection.
Each sample
filled
container
4.4.1
Inspection
of filled
containers.
4.3.1
shall
be
examined
for
defects
of
construction
of the
specified
in
tainer
and the closure
and for
evidence
of
leakage;
each
filled
container
Any container
shall
also
be weighed
to determine
the amount
of contents.
the
sample
having
one
or
more
jected,
and if
the number
acceptance
number
for
the
represented
by the sample
for
acceptance
provided
forming
products.
4.4.2
or
under
required
fill,
shall
be
conin
re-
of defective
containers
in any sample
exceeds
the
appropriate
sampling
plan
of MIL-STD-105,
the
lot
Rejected
lots
may be resubmitted
shall
be rejected.
the
Testing
Testing.
defects
as
contractor
under
has
this
removed
(or
specification
reworked)
shall
be
all
noncon-
the
following
for
purposes:
(a)
Qualification
(b)
Testing
4.4.2.1
tests
acceptance
Qualification
for
all
4.4.2.2
requi
4.6.17)
for
lots
the
and
shall
be
of
the
the
tests
(or
reworked)
all
3
individual
shall
consist
of
6.3).
(see
lots.
Testing
for
acceptance
of tests
for
the
requirements
specified
storage
stability
(see
3,4.2
and 4.6.9),
cold
temperature
adhesion
(see
4.6.16),
(see
3.4.11
specified
compound
compliance
of the material
with
jected
lots
may be resubmitted
removed
of
testing
section
and
4.6.
in
salt
3.4.10
”18).
The samples selected in accordance with 4.s.2
tests.
to
in
resistance
coating
lots.
Qualification
acceptance
abrasion
subjected
Acceptance
individual
specified
shall
consist
exception
of
(see
3.4.9
and
Lot acceptance
4.5
of
testing.
remnets
Testing
of
individual
3 with
section
spray
resistance
and
testing.
for
by
in
the
4.4.2.2
the
requirements
for
acceptance,
nonconforming
as
Government
of this
provided
material.
outlined
shall
be
in
based
specification.
the contractor
4.6.
upon
Rehas
,
4.5.1 volatile composition (for composition L - see 3.2.2.1 and 4.6.3).
Unless otherwise specified, in lieu of reporting analytical results on the
breakdown of the volatile composition of the coatj.ng compound, the manufacturer may report such results as “calculated” under the condition that he has
carefully described by separate
report,
the character
and detail
of his production methods which in his opinion, guarantee that any suitable analysis
made
include
by
the
Government
a quantitative
each
individual
if
any,
plus
ingredient
substantiating,
will
yield
statement
acceptable
of
identified
data
from
the
results.
formulation
by name,
ingredient
of
Production
the batch
manufacturer,
manufacturer.
and
data
shall
in terms
of
code
number,
TT-c-520B
4.6
Test methods.
—
“4.6.1 Test conditions. The routine and referee testing conditions shall
be in accordance with section 7, Fed. Test Method Std. No. 141, except as
otherwise speciffed herein.
4.6.2
The following tests in Table 11 shall be conducted in accordance
with Fed. Test Method Std. No. 141 and as hereinafter specified.
TABLE Il.
Applicable
method
in Fed.
Test
Method
Std.
No. 141
Tests
Chlorinated
solvents
Aromatic
hydrocarbons
Olefinic
and CYC1Oolefinic
compounds
Ketones
Total
solids
Filler
volume
Weight
per gallon
Flash
point
Consistency
Drying
time:
Set to touch
Practical
hardness
Condition
in container
Storage
stability
Spraying
properties
Sag test
Acid and alkali
resistance
Corrosion
Fire
resistance
Resistance
to flow
Salt
spray
resistance
Cold temperature
adhesion
Abrasion
resistance
4.6.3
I ndex
Test
Method
Solvent
analysis
Paragraph
of
this
specification
giving
fur-
Paragraph
of
this
specification
giving
ther
requirements
references
5132
7356
4.6.3.1
4.6.3.2
3.2.2
3:2.2.1
7356
51j’2
4041
4311
4184
4293
--
4,6.3.1
4.6.3.3
-4.6.4
--
3.2.2.1
4061
-3011
3022
4331
------
6061
--
3.2.2.1
4.6.5
4.6.6
Table
Table
Table
Table
Table
I
I
I
I
I
4.6.7
4.6.7
4.6.8
4.6.9
4.6.10
4.6.11
4.6.12
4.6.13
4.6.14
4.6.15
4.6.16
4.6.17
4.6.18
Table
Table
3.4.1
3.4.2
3.4.3
3.4.4
3.4.5
3.4.6
3.4.7
3.4.8
3.4.9
3.4.10
3.4.11
I
I
for composition L.
4.6.3.1 Separationof volatileportion. Separatevolatile portion in
accordancewith method 7355 of Fed. Test Method Std. No’.141. Reserve collected distillatefor the tests for chlorinatedsolvents,aromaticcontent,
toluene,ethyl benzene,olefinicor cyclo-olefiniccompounds,and ketones.
4.6.3.2
Aromatic
content.
Determine
total
aromatic
content
of
volatile
portion
in accordance with procedure A , method 7356 of Fed. Test Method Std.
No. 141. If the total aromatic content is between 8 and 20 percent determine percent of toluene and ethylbenzene in accordance with procedure B,
method 7356 of Fed. Test Method Std. No. 141.
7
TT-C-520B
4.6.3.3 Determination of
according
late
as
substituting
glass
ketone
content.
to method
5172 of Fed.
methyl
isobutyl
ketone.
the
following.
stoppered
tillate
followed
by
v/v
(computed
% ketone,
Add
flask
Erlenmeyer
exactly
25
as
Determine
Test
Method
Omit
first
Std.
total
five
ketone
141 (para
No.
sentences
of
to a 250
15 ml.
of absolute
alcohol
and accurately
pipette
in
ml,
of
methyl
hydroxylamine
isobutyl
1.5
= ~-V7)
of
Fed.
value
of
4.6.5
0.15
Flash
4293 of
method
be
mechanically
to
80
test
and
a
point.
Fed.
nonvolatile
Test
the
rate
to
not
conforming
has
than
a downward
be
nor
2°
)
a bulking
be determined
141,
except
to
value
in
that
direction
a l/16-inch
and allow
to
of
Steel panels.
to QQ-s-698,
65
4.6.8
Condition
method
3011
‘with
3.4.1.
shall
be determined
in
for
unworked
penetration.
of
70
of
the
accordance
dry film
of the compound
on clean
air-dry
in a horizontal
position
of
Storage
Steel
SAE
and
and
panels
1010
a No.
sharp
or
be
1020
Determine
Method
A full
Std.
20
gage
cold
composition,
2 luster
finish.
edges
shall
be
in container.
Fed.
Test
stability.
shall
SAE
The
removed
rolled
with
panels
with
package
condition
141 and observe
container
clf
steel,
a Rockwell
shall
emery
“B”
be clean,
cloth.
in accordance
for
compliance
No.
l-gallon
the
compound
shall
in accordance
for
compliance
3.4.2.
4.6.1o
Spraying
Using
pressure
compound
position,
on the
tank
and gun nozzle
of 80
onto
a 12 by 12 inch
steel
panel
to an average
wet-film
thickness
for
l/4-inch
compliance
Sag test.
4.6.11
4- x 12-inch
steel
panel
in
internal
a standard
with
coating
a
properties.
equipped
the
with
shall
a speed
be stored
for
months
and the
storage
stabi
lity
determined
with
method
3022 of Fed.
Test
Method
Std.
No.
141.
Observe
the
0.12.
conditions.
with
with
100
method
4311
has a bulking
accordance
the stirrer
at
x
0.98 x 0.82
x
raised
throughout
the
duration
more than
3“F.
per minute.
Package
consistency
using
the
procedure
.6.7.1
hardness
of 55 to
free
from corrosion,
4.6.9
in
shall
less
Spray
4.6.7.1
stir
temperature
of
4.6.6
Consistency.
with
ASTM Method
D 21T
steel
4-6”7 panels
w“
under
referee
vehicle
Flash
point
shall
Method
Std.
No.
operated
rpm and
at
the
ml.
dis-
reagent.
Determine
pigment
volume
according
141
assuming
the
volatile
thinner
No.
pigment
volume.
Test
Method
Std.
of
calcu4.3.1
x N x 0.10
1.5
4.6.4
ml.
hydrochloride
ketone)
content
4.3);
paragraph
with
Spray
panel
a vertical
a
mixing
position
heavy
and
material
employing
spray
gun
a maximum
lbs.
per square
inch,
(see
4.6.7.1)
held
in
1/8
of approximately
spray
vertical
inch.
air
the
Exami ne
3.4.3.
l/8-inch
(see
nozzle
4.6.7.1).
and
wet
film
of
Immediately
observe
for
the
compound
after
compliance
evenly
spraying
with
over
a
suspend
3.4.4.
8
1
TT-C-520B
4.6.12
Spray the compound on three
degreased
Acid and alkali
resistance.
to give
a dry-film
thickness
of
steel
panels
(see 4.6 .7.1)
approximately
l/16-inch
(0.45-0.50
lb. per square
ft.).
Air dry 24 hours
and allow
to cool to room temperature.
then bake 16 hours at 170° ~ 5“F.
Seal the panels
around the edges with
a high melting
point
wax by dipping
each edge approximately
1/4 inch in a molten
solution
of the wax and then
immerse one panel
to a depth of 6 inches
for 2“4 hours at 25°C.
(77”F.)
in a
(a) hydrochloric
acid,
10 percent
solution
of each of the following:
On removal each
panel
shall
be
(b) sulfuricacid
and (c) sodium hydroxide.
rinsed
in tap water,
wiped dry with
a soft
rag,
and observed
for compliance
Remove the coating
by solvent
cleaning
(or vapor decreasing)
with
3:4.5.
4- x 12-inch
and examine
4.6.13
each
panel
surface
Corrosion.
of
any
the
copper,
compliance
Completely
QQ-C-576,
convenient
for
size
but
aluminum,
not
less
with
3.4.5.
immerse
three
QQ-A-250/4,
clean
and
polished
strips,
steel
(see
4.6.7.1)
than
by
inches
1/2
inch
3
in
of-the
compound at a temperature
of 800 + 3°C. (176° ~ 5“F.)
ri;se
with
a petroleum
At the end of the test
period
remove,
Examine the panels
for compliance
with
3.4.6.
and dry.
4.6.14
Fire
resistance.
4.6.
paragraph
12 but
hood.
in a shielded
off
and
shut
that
shall
flaming
be
run
4.6.15
continues
to
On removal
position
flow
observe
the
in
3-
by 6-inches
as
in
panels
vertically
with
the air
supply
at
to 2
flame
After
elevated
of the
compound
as in
inch
apart
across
the
a vertical
panels,
one of the
or Tirell)
a container
for 24 hours.
naphtha
solvent,
inches
under the panel
so that
the
1 inch.
Allow
the flame
to remain
observe
the
the flame
is withdrawn,
Test
for compliance
with
3.4.7.
and check
and the results
averaged.
triplicate
Resistance
inch
panel
spaced
1/2
in
in
three
SL5pend
(Bunsen
wax.
burner
the flame
regulated
end of the panel
is in the
the panel
for 20 seconds.
lower
under
time
Prepare
do”not
Place
one
of
an oven
surface
temperatures.
4.6.12
width
of
163° + 3°C.
at
Prepare
a 4Draw parallel
but do” not wax.
of the
surface.
the
coat~ng
(325”
for
Suspend
+ 5“F.)
compl~ance
the
for
with
by
12lines
panel
24
hours.
3.4.8.
4.6.16
Salt-spray
resistance.
Prepare
and wax three
4- by 12-inch
panels
as in paragraph
4.6. 12 and then expose 36o hours to a 5 percent
salt-spray
in
Method
Std.
No.” 141.
On removal:
accordance-with
method 6061 of Fed’. Test
wash
the
panels
any visible
salt
in
warm
running
deposits
spatula
under
the coating
easily
from the
panels
or
film
or in areas
of 4 square
coating
Remove any remaining
observe
the
panel
surface
water
not
more
and
observe
for
compliance
along
one
adheres
of
by
for
or
solvent
compliance
100°F.
with
until
Lifting
over
shall
of the
be cause
(or vapor
cleaning
with
3.4.9.
free
3.4.9.
the wax edges and note
firmly.
inches
than
from
Insert
if
it
a
lifts
coating
as a solid
for
rejection.
decreasing)
and
9
TT-c-520B
4.6.17
(see
Cold
4.6.7.1)
then
be
removed.
removed
(see
figure
than
cold
box
1).
at
slams
and
70
90-degree
the
do
from
slam
test
coating
to
completed.
be
Lay
20
in
handling
time
the
panel
run
in
(
steel
panels
The compound
passes
of
panel
shall
shall
the
coating
by
a 4flat
in
a sandblast
the
the
be
effects
of
during
more than
from
the
20
cold
for
compliance
averaged.
panel
as
a sandblasting
gun
no
elapse
results
12-inch
and
from
then
the
shall
angle
and not
panel
is removed
and
panel
removed
momentarily
Observe
panel
the
is
5 seconds
triplicate
Prepare
the
The
than
at each
specified
the time
the
test
slam
wax.
used
observing
No more
resistance.
not
be
the
apparatus.
angles
degrees.
shall
Abrasion
but
shall
90 degree
80
Test
4.6.18
ject
and
gloves
elapse
the
and inspection
elapse
from
3.4.10.
4.6.12
in
80 and
70,
at
the
shall
placed
the slamming
seconds
shall
box
Asbestos
5 seconds
and
slammed
with
12-inch
edges.
applied
and conditioned
as in paragraph
4.6.12
and the masking
tape
After
conditioning
for
2 hours
at -10”F.,
the
test
panel
shall
be
from
the
cold
box and immediately
placed
in the
slam
test
apparatus
more
the
temperature
adhesion.
Three
12- by
shall
be masked
for
1 inch
along
the
in
hood
conforming
to
the
paragraph
and
sub-
following
dimensions:
Orifice
Length
Inside
of sand
diameter
4.7
with
5.2
hose
of air
hose
shall
traverse
at a distance
of
of the sandblast
the
4-inch
lbs.
(
per
sq.
in.
(
I
May
width
1 inch
from
the
gun,
the
blasted
of
the
surface
area
panel
of
shall
in
the
not
more
coating.
be
examined
for
3.4.11.
of
preparation
the coatinq
of secti~n
PREPARATION
shall
5 of
for
delivery.
The
be inspected
to
this
specification.
packaging,
determine
packing
conformance
to
agencies
mi itary
5 2 through
5.4.3.
shall
and
the
FOR DELl VERY
packing,
and
packaging,
with
MI L-STD-290
and as
Packaging
inch
1-1/4
inches
10 feet
1/4
inch
Cape
20-45
(see
5.2.1
Level
A.
The
friction
top containers,
steel
drums
as specified.
10
hose
90-100
Inspection
The
5.1
accordance
sand
sand
sand
gun
2 seconds
20 passes
markinq
of
requir~ments
5.
of
of
sandblast
compliance
1/2
of
pressure
Type
Mesh
than
After
gun
diameter
Air
The
of
Inside
marking
specified
for
in
be
6.2).
coat
in
ng
shall
5-gallon
be
furnished
lug
cover
in
steel
l-gallon
pails,
multiple
or
in
55-gallon
in
I
.,
TT-C-520B
5.2. 1.1
V,
one-gallon
2,
class
striping
shall
handles
coated
5.2.1.2
3
required.
to
resist
or
gallon
5.2.2
Level
C.
The
commercial
practices.
5.3
cans
shall
conform
to. .type
shall’
side
seam
be supplied
with wire
conform
““
and
corrosion.
handles
Fifty-five
containers
exterior”coating
One-gallon
lug-cover
Wire
top
Plan”B
steel
pails
shall
bails
shall
be
steel
drums
shall
treated
to
to
conform
type
resist
to
11,
class
corrosion.
PPP-D-729,
type
Iv.
or
during
friction
PPP-c-96.
Five-gallon
5.2.1.3
Ill
of
be
PPP-P-704..
of
multiple
round,
-
shipment
and
Packing
(see
5.3.’
packed
in
(Appendix)
coating
shall
be packaged
in accordance
Protection
shall
be such as to prevent
ensure
safe
at
destination.
6.2).
The coating
Level
A.
compliance
with
the
.
delivery
with
suppliers’
deterioration
Five-gallon
pails
packaged
in l-gallon
containers
overseas
shipment
requirements
and
55-gallon
steel
drums
will
of
shall
be
PPP-C+6
require
no
overpacking.
tic
5.3.2
Level
B.
The coating
shall
shipment
requirements
ofppp-C-96
55-gallon
steel
drums will
require
be packed
in
(Appendix].
5.4
with
the domespails
and
no overpacking.
Packing
shall
be in
5.3.3
Level
C.
adequate
to ensure
acceptance
and safe
of ~ransportation
employed.
5.3.4
palletized
accordance
Five-gallon
accordance
delivery
Pallets.
When specified
(see 6.2)
in accordance
with
MIL-STD-147.
with
commercial
by the
shipping
carrier
containers
practice
for
the
shall
mode
abe
Markin~.
5.4.1
Civil
tainers
shall
in 5.4.3.
5.4.2
containers
in 5.4.3.
agencies.
be marked
Military
shall
in
agencies.
be marked
Intermediate
accordance
in
packages
Fed.
with
Intermediate
accordance
and
Std.
exterior
No.
123
packages
and exterior
with
MIL-STD-290
and
shipping
conand as specif
ed
shipping
as specified
11
TT-c-520B
4
5.4.3
each
Additional
can,
pail
marking
and
instructions
for
drum
use
(label
shall
and
requirements).
be
caution
INSTRUCTIONS
Unless
legibly
marked
or
labeled
Wh i e it
the
may
be
usual
wh i ch
y applied
there
are
capac
ty from
pressure
FOR USE:
feet
of
or
two
sets
air
to
ed
of
to
of
tank
to
gun
unit.
Some
with
as
inside
diameter
atomizing
The
material
and
atomizing
air
of
100
pressure
to
fit into bung open
on
spray
should
oil,
The underbody
(40°
to 90”F.)
tar,
coating
and the
compound
applying
the
contamination.
away
coating.
is
per
lbs.
squa~e
the
pump.
gun
be
is
the
applied
rust,
etc.,
material
estimated
from
the
on
same
as
of
inch
the
for
gauges
gun.
15 feet
3/4-inch
control
The
atomizing
OF
pipe
l/4-inch
thread
is
used.
ng
of
d be
a drum
cover
kept
covered
Twenty-five
but
of
air
out-
hose.
for
attachThe
second
the
coatThis
elimpressure
most
come
but not
sealed
feet
of 3/4-
form.
pump the ccating
A 3/8to the gun.
the spray
gun to one of the
two
The pum~s come equipped
with
air
regu-
pressure
on
air
pressure
CAUTION:
12
coupled
The
hose
is used to
is used to connect
outlets
material
of an air-operated
barrel
pump that
delivers
original
55-gallon
containers
to the
gun.
time-consuming
job
of refilling
the
smaller
pumps
diameter
hose
grease,
Keep
the
materia’1
spray
equipment
tank
unit
varyina
in
per minute
no really
supplied
efficient
appl
The
cation.
to the
spray
gun with
approximately
with
either
one
tank
head
is provided
drum covers.
The drum shou
this
would
cause
a vacuum
to
air
atomizing.
The
jobs,
feet
for
the gun with
approximately
having
a spray
head with
lator
which
controls
air
and gauge
which
controls
mud,
small
supply
regulators
and
type
of unit
consists
ing directly
from
the
inates
the bothersome,
inch
inch
An air
15 cubic
is needed
hose.
ai r pressure
on
standard
heavy
One is a pressure
feed hose from tank and a l/4-inch round nozzle
the
tank
a brush
10 to
fluid
the
let
is connected
A special
spray
equipped
air-tight
with
compressor,
the tank
is
thick
coat
(1/8
etc.
, of autofumes,
and to
corrosion.
12 gallons.
3/4-inch
supply
ing
appl
a volume
by a 3- to 5 hp.,
bottom
outlet
of
15
from
in the field
with
two ma n types.
10
and
meta
sDecified,
following
markings:
This
underbody
coating
is intended
for
use in one
inch)
on the
underside
of hoods,
fenders,
floors,
mobiles
to deadel
noise,
to act
as a seal
against
protect
otherwise
with
the
as
pump and with
the air
line
used
with
received
has
been
should
‘shelf
to
a second
regulator
to the
spray
gun for
the
the
pressure
steel
tank
surface
unit.
from
which
removed.
be stored
under
good conditions
life’
(closed
containers)
is
2 years.
FLAt MABLE
flames
Avoid
pro
Provide
snged
adequate
breathing
ventilation
of
vapors
while
or
excessive
skin
‘
TT-C-520B
6.
NOTES
The underbody
coat!ng
covered
by this
specification
Intended”use.
for use in one thick coat (.]/8inch)
on the underside
of hoods,
of automobiles
to deaden noise,
to act as a seal
floors,
etc.
and to protect
the metal
from corrosion.
fumes,
6.1
is
intended
fenders,
against
6.2
Purchasers
Ordering
data.
and procurement
herein
should
documents
and date
number,
and composition
(a)
(b)
Title,
Quantity
(c]
(d)
Alternate
Level
of
inspection
preservation,
(e)
Unit
and
exterior
(f)
The
coating
exercise
specify
should
any
the
desired
options
offered
following:
of this
specification.
required.
if
applicable
packing,
and
(see
4.1).
packaging
required
(see
section
5).
vo 1 ume$
the
(g)
being
unit
Whether
package
covered
by
one
quantities
this
U.S.
gallon
palletization
of
when
applicable.
specification
of
should
231
cubic
container
shipping
be
inches
is
purchased
by
68”F.
at
required
(20”C.).
(see
s.3.4).
I
6.3
With
Qualification.
respect
to
products
requiring
qualification,
awards
will
be made only
for
such products
as have,
prior
been tested
and approved
for
inclusion
for
opening
of bids,
Qualified
Products
List
whether
or not such products
have
listed
by
that
quirement
they
propose
order
that
The
to
offer
may
Aberdeen
Proving
agency
The
procuring
agency.
6.4
The
compound
for
Use,
be
if
thinned
may
raised
to the
Surgeon
Directions
I
may
desired
Federal
be
regarding
departmental
General
of
be
applied
Coating
toxicity
medical
the Army
with
either
5.4.3).
paragraph
It
with
a small
amount
is
of
is
called
to
the
products
for
and
that
Chemical
in
the
the
Laboratory,
to
activity.
should
brush
rethat
for
for
pertaining
authority.
will
act
supplied
mineral
this
qualification
or orders
responsible
information
from
the
time
set
in the applicable
actually
been so
have
contracts
activity
and
obtained
to
tested
awarded
The
21005,
be
suppliers
arrange
Government
to
Maryland
products
questions
procuring
procurement,
the
to
specification.
is the
USA MERDC,
Ground,
of
the
of
urged
eligible
covered
by this
Products
List
Any
are
to
be
products
Qualified
6.3.I
attention
manufacturers
they
qualification
I
date.
and
to
be
as
or
referred
[n the
advisor
power
ready
spirits
by
case
of
to the
spray
the
Army
(see
for
use,
but may
conforming
to
TT-T-291.
6.5
and
Metal
grease
parts
before
of
vehicles
applying
the
should
be
clean
and
dry,
free
from
rust,
oil,
compound.
13
TT-c-520B
6.6 It is bel eved that this specification adequately describes the
to secure
the desired
material,
arid that
normally
characteristics 1ecessary
no samples will be necessary prior to award to determine compliance with
the specification. If, for any particular purpose, samples with bids are
necessary.
they should be specifically asked for in the invitation for bids,
and the particular purpose to be served by the bid sample should be definitely
stated, the specification to apply in all other respects.
6.7 Composition L compound should be specified for use in areas
lations controlling the emission of solvents into the atmosphere.
MILITARY
CUSTODIMTS:
Army - MR
Air Force - 84
with
regu-
‘Preparing activity:
Army - MR
CIVIL AGENCIES COORDINATING ACTIVITY:
User activities:
GSA-FSS
Army - AT
Navy - SA, MC
I
I
Orders for this publication are to be placed with General Services Administration, acting as an agent for the Superintendent of Documents. See section 2 of
this specification to obtain extra copies and other documents referenced herein.
Price 20 cents each.
14
‘IT-C-520
1/$” Guide Plate
F1(3uRE
I.-Slam
—.——.
teuter{for
cold a.dhmima.
_—— ..15
II