TO 1-1-700 - Robins Air Force Base

TO 1-1-700
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 7.7.4.2 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 7.7.4.2 step e over the primer
using maintenance painting and touch-up procedures in
Chapter 5 of TO 1-1-8.
7.7.6 Tin on Copper and Copper Base Alloys. 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.
7.7.6.1 If surface, when reassembled in its normal operating
condition will be exposed to direct view, the following procedure
shall be used:
a. For DEPOT LEVEL maintenance only, strip old plating
from equipment or part to the base metal per procedures
in TO 42C2-1-7. For FIELD LEVEL maintenance and
when it 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, reapply tin plating by
the hot dip method per ASTM B-339, Grade A to a
minimum thickness of 0.7 mils (0.0007 inch) or by electroplating
per ASTM B-545 to a minimum thickness of
0.5 mils (0.0005 inch) using procedures in TO 42C2-1-
7, and treat the plated 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
c. 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
d. 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
in Chapters 4, 5, and 6 of TO 1-1-8. The color and gloss
shall match the existing coating system as specified in
equipment system specific technical data or as otherwise
directed by the equipment SPM.
7.7.6.2 . 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 0.7 mils (0.0007 inch) for hot
dip and 0.5 mils (0.00005 inch) for electroplating.
7-32 Change 4