TM 55-1520-240-23-1
1-80
MATERIALS CLEANING
(Continued)
1-80
Cleaning and Treating Corroded Parts
METAL
FORM
CLEANING
TREATMENT
Aluminum unfinished
surfaces only
Mild surface pitting,
staining, and superficial
etching
Apply metal conditioner (E242), type
III, with stiff bristle brush. Rinse with
fresh water.
Apply brush touchup conversion
treatment of alodine 1200 (E65) in
accordance with requirements of
MIL-C-5541
Aluminum
Heavy surface pitting
Hand rub with aluminum wool (E72)
and naphtha (E245). Apply metal
conditioner (E242), type III. Rinse with
fresh water.
See above
Aluminum Alclad unfinished
surfaces
Mild or heavy surface
pitting, staining, and
superficial etching
Apply metal conditioner (E242), type
III. Rinse with fresh water. Do not use
abrasives.
See above
Aluminum
Intergranular corrosion
Remove corroded areas with routing
tools. Burnish parts to remove all
sharp edges.
See above
Aluminum
Stress corrosion (Cracking)
Repair or replace parts in accordance
with applicable repair figure.
Not applicable
Magnesium
Surface pitting
Small parts
(Refer to Task 1-82)
(Refer to Task 1-82)
Magnesium
Surface pitting
Large, nonremovable parts — remove
corrosion products with a stiff bristle
brush
Apply type J chrome-pickle solution
or type VI chromic acid solution in
accordance with MIL-M-3171 for 1 to
3 minutes. Wash with fresh water
Magnesium
Stress corrosion (Cracking)
Repair or replace parts in accordance
with applicable repair figure
Not applicable
Steel
Severely rusted
Replace parts
Not applicable
Steel
Lightly rusted parts (No
deep pitting)
Use steel wool (E373) to remove rust
and clean as necessary
Cadmium-plate removable parts in
accordance with QQ-P-416. Brush
cadmium plate local bare areas in
accordance with MIL-STD-865. If post
chromate treatment is not applied
to cadmium plate, apply one coat of
wash primer (E302) in accordance
with MIL-C-8507. Then apply primer
(E291) or primer (E292)
NO BREAK - WORK HARDER
NO BREAK - WORK HARDER
FOLLOW-ON MAINTENANCE:
As Required
END OF TASK
1-303
