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 TM 5-684/NAVFAC MO-200/AFJMAN 32-1082
Table 3-2. Cleaning ceramic insulators and bushings
How applied
Results
Type of cleaner
Deposit
Acid crust from a chemical
Satisfactory
Rag.
Bon
plant.
Brush . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fair
Ammonium bifluoride
Oakite2
Hot bath
Satisfactory
Brush.
Satisfactory
Lockbrite
Rag.
Satisfactory
Paint thinner . . . . . . . . . . . . . . . . . . . .
Skybrite window cleaning
Black paint carbon.
Wash
Satisfactory
Dilute muriatic acid.
Cloth
Satisfactory
Extra-coarse steel wool
Rub . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Good
Brush.
Satisfactory
Hydrochloric acid3
Cement dust.
Brush.
Satisfactory
Wire brush
Steel wool, rags, and salvasol
Requires annual cleanup
Scrape and apply paraffin
Steel wool, rags, and salvasol
Used below 32F
F l y ash..........................
Rag.
Used below 32F
Wash
Satisfactory
Bon
and
Gummy soil, dirt and oil.
Iron ore . . . . . . . . . . . . . . . .
Skybrite window cleaning
Brush.
Satisfactory
............................
Dip or wipe.
Satisfactory
Brush . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leather dust
Muriatic acid3
Hand
Satisfactory
Lime............................
Wipe.
Satisfactory
Rag.
Satisfactory
Dry cloth.
Oil soot . . . . . . . . . . . . . . . . . .
Paint thinner4
Rag.
Satisfactory
Red lead
Water . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water and rags, steel wool, rags,
Salt.
and water.
Satisfactory
Satisfactory
Smoke..........................
Steel wool, rags, and water
Satisfactory
Rags.
Satisfactory
Sulfur.
Cloth
Satisfactory
Standard Oil
Cloth
Satisfactory
Traffic film
Atomizer and wipe with dry rags. Fair
Windex glass
Unknown
Rag-coat porcelain, rub off, and
Vinegar and bicarbonate of soda
Vapors from paper mill.
finish with steel wool.
Fair
paste . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brush.
Satisfactory
Brush . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wood-mill dust
1
The insulating qualities of ceramic insulators and bushings and their ability to prevent flashovers depend largely on the glass-like glaze
of the surface. During cleaning operations, therefore, care must be taken to preserve this smooth surface and prevent its being scratched
or dulled.
2
The use of brand names is to identify the type of material recommended and does not imply superiority over other brands of similar
material.
3
This chemical gives off irritating fumes which are dangerous in high concentration. Do not use without respiratory protection.
4
Some paint thinners are highly flammable. When use of a thinner having a flash point under 100F (38C) is necessary, it will be
handled in accordance with applicable safety regulations.
followed since weathershed construction and ce-
(3) Muriatic acid, diluted with water to a 10- to
ramic materials vary.
50-percent solution, is effective for many extremely
d. Cleaning while energized. Although insula-
tenacious contaminations. The acid concentration
tors may be washed while energized by the use of
should be kept as low as possible, because it tends
complex equipment, it is not recommended as a
to attack metal parts and cemented joints. It is
general practice for small military installations.
applied with a fiber or bristle brush or cloth and
At large military installations, where personnel
permitted to work for approximately 3 minutes, af-
have been properly instructed and trained,
ter which the porcelain should be scrubbed clean
and rinsed thoroughly with clean water. Rubber
ANSI/IEEE 957 should be used as a guide for clean-
ing energized insulators. If either the serving utility
gloves and goggles should be worn to protect hands
or a local contractor is equipped to perform this
and eyes from the acid.
c. De-energized cleaning for nonceramic insula-
service, contracts for this type of work might be
tors. Manufacturers' recommendations should be
justified.
3-6
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