TO 1-1-700 - Robins Air Force Base

TO 1-1-700
7.7.7.2 If surface is not exposed to direct view in its normal
operating condition, except while under repair, no further finish
over plated surface shall be required. However, plating
thickness shall be a minimum of 0.5 mils (0.0005 inch).
7.7.7.3 . Where only partial refinishing (touch-up) is
required for a few small scratches, nicks, or spots where corrosion
was removed on painted surfaces, the following procedure
shall be used:
a. Scuff sand and feather out painted edges and all corroded
or scratched surfaces to be refinished per maintenance
painting and touch-up procedures in Chapter 5 of
TO 1-1-8.
b. Clean the entire surface to be touched-up of all dust,
dirt, oil, and grease by solvent wiping per procedures in
Chapter 3 of TO 1-1-8 prior to priming. Apply one coat
of the same primers specified in paragraph 7.7.7.1 step d
to all surfaces to be touched-up (both those exposed and
unexposed to direct view in normal operating conditions)
using maintenance painting and touch-up procedures
in Chapter 5 of TO 1-1-8.
c. If surfaces are exposed to direct view in normal operating
conditions, apply one coat of the same topcoats
specified in paragraph 7.7.7.1 step e over the primer
using maintenance painting and touch-up procedures in
Chapter 5 of TO 1-1-8. Surfaces not exposed to direct
view require no topcoat.
7.7.8 Nickel on Ferrous Base Metal. When complete refinishing
is required due to extensive corrosion or loss of film
adhesion, disassemble the equipment and/or structure as far as
practical. Remove the defective paint system per procedures in
Chapter 2 of TO 1-1-8.
7.7.8.1 . If surface, when reassembled in its normal operating
position, will be exposed to direct view, use the following
procedure:
a. For DEPOT LEVEL maintenance only, strip old plating
(copper and nickel) from equipment or part to the base
metal per procedures in TO 42C2-1-7. For FIELD
LEVEL maintenance and when it is impractical to strip
the plating due to size, shape, or connection to other
parts, lightly sand areas where corrosion is noted to
remove corrosion products of the plating as well as the
base metal per procedures in Chapter 5 of TO 1-1-691.
b. For DEPOT LEVEL maintenance only, reapply copper
plating per SAE AMS 2418 (MIL-C-14550) to a minimum
thickness of 0.65 mils (0.00065 inch) and nickel
plating per SAE AMS-QQ-N-290 (QQ-N-290) to a minimum
thickness of 0.5 mils (0.0005 inch) using procedures
in TO 42C2-1-7.
c. Treat the metal surface with the metal conditioner
described in paragraph 7.8 of this manual.
MIL-PRF-23377, TYPE I & II, PRIMER, EPOXY
CHEMICAL AND SOLVENT RESISTANT 38
MIL-PRF-85582, PRIMER, EPOXY, WATERBORNE 69
MIL-DTL-53022, PRIMER, EPOXY, CORROSION
INHIBITING, LEAD AND CHROMATE FREE 34
MIL-P-53030, PRIMER, EPOXY, WATER REDUCIBLE,
LEAD, CHROME FREE 35
d. Prime the plated surfaces with one coat of MIL-PRF-
23377, Type I, Class C or MIL-PRF-85582, Type I,
Class C2 epoxy primers to a DFT of 0.6 to 0.9 mils
(0.0006 to 0.0009 inch) or MIL-DTL-53022 or MIL-P-
53030 epoxy primers to a DFT of 0.9 to 1.1 mils
(0.0009 to 0.0011 inch), as applicable, from the equipment
system specific technical data. Application shall
be per procedures in Chapters 4, 5, and 6 of TO 1-1-8.
MIL-PRF-85285, COATING POLYURETHANE, HIGH
SOLIDS 50
MIL-DTL-64159, COATING, POLYURETHANE,
CHEMICAL RESISTANT, WATERBORNE 24
e. Apply two coats of either MIL-PRF-85285 standard
polyurethane coating or MIL-DTL-64159 waterborne
CARC polyurethane coating to a DFT of 1.8 to 3.2 mils
(0.0018 to 0.0032 inch) over the primer per procedures
7-34 Change 4