FAA Advisory Circular 43.13-1B
Acceptable Methods, Techniques, and Practices
Aircraft Inspection and Repair
AC 43.13-1B | 6. Corrosion, Inspection, and Protection | 6. Corrosion Removal Procedures | 6-91. Corrosion Control Work Procedures
AC 43.13-1B
9/8/98
(14) In confined location, do not use
solvents with a low flash point, (below 100 �F)
such as Methyl Ethyl Ketone (MEK) and ace
tone.
a. If rework procedures or materials are
unknown, contact the aircraft manufacturer or
FAA authorized Designated Engineering Rep
resentative (DER) before proceeding.
(15) All equipment should be cleaned
after work has been completed.
(16) Check and follow all applicable re
strictions and requirements on the use of sol
vents, primers, and top coats.
(17) Check and follow all applicable re
strictions and requirements for use and dis
posal of waste material.
b. Blasting. The following precautions
should be taken when using any type of blast
ing equipment:
(1) Operators should be adequately
protected with complete face and head cover
ing equipment, and provided with pure
breathing air.
(2) Static-ground the dry abrasive
blaster and the material to be blasted.
(3) Magnesium cuttings and small
shavings can ignite easily and are an extreme
hazard. Fires of this metal must be extin
guished with absolutely dry talc, calcium car
bonate, sand, or graphite by applying the pow
der to a depth of 1/2 inch over the metal.
(4) Titanium alloys and high-tensile
strength steel create sparks during dry abrasive
blasting. Care should be taken to ensure that
hazardous concentrations of flammable vapors
do not exist.
6-91. CORROSION CONTROL WORK
PROCEDURES. The effectiveness of corro
sion control depends on how well basic work
procedures are followed. The following com
mon work practices are recommended:
b. The work areas, equipment, and com
ponents should be clean and free of chips, grit,
dirt, and foreign materials.
c. Do not mark on any metal surface with
a graphite pencil or any type of sharp, pointed
instrument. Temporary markings (defined as
markings soluble in water or methyl chloro
form) should be used for metal layout work or
marking on the aircraft to indicate corroded ar
eas.
d. Graphite should not be used as a lu
bricant for any component. Graphite is ca
thodic to all structural metals and will generate
galvanic corrosion in the presence of moisture,
especially if the graphite is applied in dry
form.
e. Footwear and clothing should be in
spected for metal chips, slivers, rivet cuttings,
dirt, sand, etc., and all such material removed
before walking or working on metal surfaces
such as wings, stabilizers, fuel tanks, etc.
f. Do not abrade or scratch any surface
unless it is an authorized procedure. If sur
faces are accidentally scratched, the damage
should be assessed and action taken to remove
the scratch and treat the area.
g. Coated metal surfaces should not be
polished for aesthetic purposes. Buffing
would remove the protective coating and a
brightly polished surface is normally not as
corrosion resistant as a non-polished surface
unless it is protected by wax or paint.
Page 6-18
Par 6-90