cleaned by purging and flushing with
material used. When the material is a
catalytic system (epoxy or polyurethane),
this must be done immediately after use
and before the prescribed pot life limit
has been reached to prevent the material
from gelling in the system.
Hoses. Because of friction losses in
hose, it is essential that the proper sizes be used. Do
not use hoses longer than 50 feet except in the case of
high pressure air hoses leading to the regulator or tank.
Extra lengths of hose may be attached for this use but
should be removed when no longer needed . The high
pressure air hose should have a minimum inside
diameter of 7/16 inch. No less than 3/8 inch I D fluid
hose should be used from the tank to the gun and no
less than 5/16 ID air hose from the regulator to the tank
and from the tank to the gun. Any reduction in size or
increase in length from the forestated may produce
unsatisfactory results. Air and paint hoses are furnished
in various standard lengths. Determine the length
required for use in a spray booth measuring the width of
the booth and add two feet for the total required length
of the hose.
Spray guns for manual applications. MIL-
C-46168 paints shall be applied only in approved and
qualified facilities. No application of MIL-C-46168 shall
be accomplished in open air.
Paint booths and application equipment.
No description or details is provided for painting facilities
due to the variance of equipment and local conditions.
instructions should be consulted.
Paint brushes. Paint brushes should be
used during touchup procedures in open air when
applying MIL-C-46168 paint. Consult paragraph 9-3p on
touchup procedures for details.
Primers. Primers and their uses are described
in the paragraphs that follow.
General use. Primers are used on metals
to provide a coating to which subsequent coatings will
firmly adhere and provide protection for the substrate
metal against corrosion. The pigment portion of primers
for ferrous base metals usually consists of iron oxide,
lead chromate, red lead, zinc chromate, zinc oxide, zinc
dust, or a mixture of these. Zinc olstrontium chromate is
the pigment in some primers used on substrates of
magnesium, aluminum and their alloys. Other primers
which are lead and chromate free are desirable for most
applications and required in applications where lead and
zinc chromate are prohibited.
Primers are used as corrosion inhibiting coatings on
metal surfaces to inhibit corrosion and provide good
adhesion for the topcoat. Primers will conform to MIL-
P-23377 or MIL-P-85582.
MIL-P-23377 primer. This is an epoxy
polyamide primer furnished as a two component kit
wherein the two components are mixed prior to use. It
is intended for application to clean aluminum and
magnesium substrates. One component contains the
pigment, mixed in an epoxy vehicle, while the other
component consists of a clear polyamide solution which
functions as a hardener for the epoxy resin. These
excellent storage stability. When mixed, storage pot life
is eight hours. Only that amount which can be used in
an eight hour period should be mixed.
MIL-P-85582 primer. MIL-P-85582 primer
is a water reducible, multicomponent, epoxy type,
chemical and solvent resistant primer coating. The
primer is intended for use on metal surfaces as a
corrosive inhibitive, chemical resistant, strippable,
epoxy primer that is equivalent to MIL-P-23377 primer
and compatible with MIL-C-85285, MIL-C-46168 and
MIL-C-83286 polyurethane topcoats. Type II primer is
intended for use where low infrared reflectance is
Opening of Containers. Containers must be
opened slowly to allow the pressure to escape before
completely removing the seal.
· Containers of paint may develop
internal pressure during storage and
should be opened cautiously. Failure to
follow this procedure may result in paint
· Respirator must be worn. Fumes
permanent damage if exposure is