TO 35-1-3 - Robins Air Force Base
TO 35-1-3 - Robins Air Force Base
TO 35-1-3 - Robins Air Force Base
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<strong>TO</strong> <strong>35</strong>-1-3<br />
3.19 LIQUID OXYGEN AND LIQUID NITROGEN SER-<br />
VICING CARTS AND S<strong>TO</strong>RAGE TANKS.<br />
Excessive numbers of paint layers will result in hidden<br />
corrosion going unnoticed or interlaminar failure<br />
of the coatings at one of the coating boundaries.<br />
3.18.1.2 Powder coated equipment shall be touched up using<br />
MIL-PRF-85285, Type I or II. SEMPEN or the prepackaged<br />
spray touch-up kits shall be used on small areas less than one<br />
square foot. All damaged areas shall be feather-edge sanded<br />
along the edge damaged area to allow the repair coating to<br />
blend in the surrounding areas. The remaining areas to be<br />
touched-up shall be scuff sanded with 180 or 240 grit abrasive<br />
paper. All bare aluminum areas resulting from coating failure<br />
shall be pretreated with the chromate conversion coating<br />
SEMPEN prior to priming. The bare areas shall be primed and<br />
topcoated with one of the authorized organic coating systems<br />
listed in Table 3-1, coating systems 1 or 2.<br />
3.18.2 Prepackaged Coating Touch-Up Kits. For minor<br />
primer and paint touch-up such as scratches and other small<br />
repair, the use of prepackaged touch-up kits manufactured<br />
with the compatible the authorized conversion coatings, primers<br />
and topcoats are encouraged.<br />
3.18.2.1 Use of the prepackaged touch-up kits minimizes<br />
material waste and personnel exposure to paints and solvents<br />
while allowing for the use of the proper coating system for the<br />
repair.<br />
3.18.2.2 SEMPENs, Preval compressed air spray packs,<br />
Clip-Pacs, or Akzo Nobel Two-Component MIL-PRF-85285<br />
Aerosol Can are currently obtainable in MIL-PRF-85285,<br />
Type I, high solids polyurethane. Single component aerosols,<br />
enamels or lacquers are not authorized coatings. Information<br />
about these materials can be viewed on the AFCPCO website<br />
located on the AF Portal.<br />
3.18.3 Radiators Coatings. Radiator coatings are preapplied<br />
at the OEM. Field repair is limited to touch-up of the<br />
body and attach points of the radiator but not the radiator<br />
vanes/core. For touch-up, use the appropriate color of polyurethane<br />
from Appendix A. A thin layer of water displacing, hard<br />
film CPC, MIL-DTL-85054, may be fogged into the radiator<br />
vanes for added protection or for temporary repair. Do not use<br />
soft film CPC materials as the coating may collect dirt and<br />
debris on the cooling vanes reducing the efficiency of the radiator.<br />
An aerosol extension kit such as the FORMIT® 90<br />
degree applicator, or equivalent, may be used to fog the CPC<br />
into recessed areas of the radiator. Heavy buildup of the paint<br />
and/or CPC is to be avoided. To prevent CPC buildup, remove<br />
and reapply the CPC, MIL-DTL-85054 during normal wash<br />
cycles. Use of soft film CPC is not recommended as they tend<br />
to collect contaminates and would reduce the cooling efficiency<br />
of the radiator.<br />
Liquid nitrogen and liquid oxygen servicing carts and storage<br />
tanks will be drained and purged in accordance with the applicable<br />
equipment technical order prior to cleaning and painting.<br />
All valves and instrumentation shall be masked after<br />
draining and purging to prevent contamination and<br />
explosion hazard during cleaning and painting.<br />
3.19.1 Authorized Materials for Liquid Oxygen and<br />
Nitrogen Tanks. The colors for liquid oxygen, liquid nitrogen<br />
servicing carts and storage tanks will be according to Paragraph<br />
3.5.3. Liquid oxygen and nitrogen servicing carts and<br />
storage tanks will be primed with one coat of epoxy primer,<br />
MIL-PRF-23377, Type I, Class 2, or MIL-DTL-53022, Type II<br />
(Lead and Chromate Free Epoxy Primer), 0.6 to 0.8 mil dry<br />
film thickness, then finished with one coat of MIL-PRF-85285<br />
applied to a dry film thickness of 1.6 to 2.4 mils. Exceptions to<br />
this finish system shall be approved by Warner <strong>Robins</strong> ALC/<br />
LESG.<br />
3.20 WALKWAYS AND STEPPING SURFACE COAT-<br />
INGS.<br />
The stepping, standing and/or walking surfaces of stands,<br />
metal ladders, platforms, tops of deicing-decontamination unit<br />
tanks, etc., shall be coated with walkway coating, A-A-59166.<br />
Expanded metal, grating and other anti-skid plates are<br />
exempted as long as they are safe from slippage. Adhesive<br />
backed, non-slip material MIL-PRF-17951 may be used as an<br />
alternate. Follow the non-slip material manufacturers' application<br />
instructions.<br />
3.21 COLORS FOR WASTE CONTAINERS.<br />
Containers (Bowsers) used for holding explosive or highly<br />
flammable materials will be painted and marked in accordance<br />
with <strong>TO</strong> 42B-1-23.<br />
3.22 SE UNDERCOATING.<br />
A-A-59295 undercoating is authorized for use by field units.<br />
The undercoating is intended for use in one thick coat (1/8<br />
inch) on the underside of fenders, floors, etc., to deaden noise,<br />
to act as a seal against fumes and to protect the metal from<br />
corrosion.<br />
3-16 Change 8