01 March 2005
15 July 2008
5-3. PROTECTIVE COATINGS.
from corrosion. Long-term repair of the damaged area
is achieved by touch-up painting.
5-3.1.3. Extensive Paint Damage. Extensive paint
For information on procedures and equipment
damage requires stripping of old paint, cleaning,
to be utilized for paint stripping, conversion
conversion coating, priming and/or undercoating, and
coating, pre-paint preparation, paint mixing,
applying topcoat(s). Personnel should refer to Volume
and paint application techniques, refer to
II of this manual (Navy), TO 1-1-8 (Air Force), or
Volume II of this manual (Navy), TO 1-1-8 (Air
TM 55-1500-344-23 (Army) for paint stripping
Force), or TM 55-1500-345-23/TB 43-0118
5-3.2. PAINT MATERIALS. The paint materials
5-3.1. GENERAL. Protective coatings are susceptible
available for use on avionic equipment are as follows:
to damage by handling, accidental scratching, and
corrosion. The function of boxes, chassis, housings,
and frames are to enclose, protect and secure the vital
internal components of any avionic unit. Therefore, it is
Epoxy Primers, MIL-PRF-85582 and
important that this structural integrity be maintained at
MIL-PRF-23377, are issued in two-part kits.
the Intermediate Maintenance Activity (IMA) by the
Mix only the materials from the same kit (brand
proper application of protective coatings.
and batch number of both cans should be the
same). Follow mixing instructions printed on
5-3.1.1. Painted Surfaces. Painted surfaces on avionic
equipment will withstand a normal amount of abrasion
from handling and hand tools. However, chipped,
scraped, scratched, and scuffed surfaces of protective
paint will cause the base metal of the structure to
a. Water Reducible Epoxy Primer, MIL-PRF-85582
become corrosion prone. The avionic technician in the
(Volume IV or V, Chapter 2), is used to improve topcoat
Organizational/Unit Maintenance Activity shall pay
adhesion and provide a corrosion inhibited undercoating.
particular attention to the mishandling of hand tools
This two-part material should be mixed and applied
and avionic equipment. A few minutes of extra time
over properly prepared surfaces in accordance with
spent in the careful use of tools will save hours of paint
procedures contained in Volume II of this manual (Navy),
touchup and corrosion removal work. When properly
TO 1-1-8 (Air Force), or TM 55-1500-345-23 (Army).
applied, these coatings will prolong the useful life of
the base material protecting it from corrosion and
b. P r i m e r
harmful agents. Any painting operation involves three
to improve topcoat adhesion and provide a corrosion
inhibited undercoating. This two-part material should
a. Surface preparation.
be mixed and applied over properly prepared surfaces
in accordance with procedures contained in Volume II
b. Application of primer and/or undercoat.
of this manual (Navy), TO 1-1-8 (Air Force), or
TM 55-1500-345-23 (Army).
c. Application of one or more finish/topcoats.
5-3.2.2. Topcoat. The topcoat is the final or finish coat
applied over the primer. Selection of topcoat color,
when equipment is refinished, shall be based on the
normal equipment location.
Compound, Corrosion Preventative,
a. For Navy applications, the topcoat shall be
Topcoat, Polyurethane, Aircraft, MIL-PRF-85285 Type I
5-3.1.2. Minor Paint Damage. Minor paint film damage
occurs via chipping, scratching, and abrasion. Use
coated with Flat Black, Color Number 37038 (Volume IV,
Corrosion Preventative Compound, MIL-DTL-85054
Number 36231 (Volume IV, Chapter 2) is acceptable as