TM 55-1520-240-23-1
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CLEAN AND TREAT MAGNESIUM ALLOY PARTS (AVIM)
(Continued)
1-82
NOTE
The dichromate treatment makes
magnesium alloys corrosion resistant
and serves as a base for paint.
(8)
Refinish cleaned and treated parts as
soon as possible.
4.
Parts requiring touchup only can be
chrome-pickle treated as follows:
a.
Clean parts with cloths (E120) soaked in
naphtha (E245) or equivalent.
b.
Prepare one of the following chrome-pickle
solutions.
(1)
Solution I. Mix 1-1/2 pounds of sodium
dichromate (E357) and 1-1/2 pints of
nitric acid (E22) to a sufficient amount of
water to make 1 gallon of solution. Use
polyethylene, stainless steel, glass, or
vinyl-lined container.
(2)
Solution II. Mix 1-1/3 ounces of chromic
acid (E114) and 1 ounce of calcium
sulphate (E91) to a sufficient amount
of water to make 1 gallon of solution.
Use stainless steel, glass, or aluminum
container. Apply solution by brushing.
Allow solution to remain on surface for 1
to 2 minutes. Gently wash part with a
cloth (E120) soaked with water.
NO BREAK - WORK HARDER
NO BREAK - WORK HARDER
FOLLOW-ON MAINTENANCE:
As Required
END OF TASK
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