(12)
Pressure air-dry (20 psig (137,895 kPa) maximum) to remove excess water.
(13)
Dry part in oven at 250F (121C) for two hours.
Cleaning
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I. Method No. 203J: Cleaning Plain Steel and Stainless Steel Clean plain steel and stainless steel parts as follows: WARNING: SOLVENT VAPORS ARE TOXIC AND FLAMMABLE. DO NOT INHALE VAPORS. OBSERVE FIRE PRECAUTIONS.
(1) Clean surfaces with solvent (Federal Specification P-D-680, Type I) (SECTION VII) to remove oil and grease contamination.
NOTE: It is not necessary to remove heat discoloration.
CAUTION: EXTREME DAMAGE CAN OCCUR TO NON-STEEL PARTS IF CLEANED WITH RUST STRIPPER SOLUTION.
(2) Immerse parts in rust stripper solution (Method No. 202E) for 10 to 20 minutes.
NOTE: The solution will remove rust, loosen scale, dissolve varnish deposits, and soften organic compounds.
WARNING: USE CORRECT PERSONAL PROTECTION. THIS CHEMICAL SOLUTION CAN CAUSE SKIN, EYE AND LUNG DAMAGE. THE DANGER AND PRECAUTIONS FOR EACH CHEMICAL IS DIFFERENT.
CAUTION: DO NOT DAMAGE HIGHLY FINISHED SURFACES. USE ONLY STIFF PLASTIC FIBER BRISTLED BRUSH ON HIGHLY FINISHED SURFACES.
(3)
After soaking in rust stripper solution, remove parts, rinse, and scrub surfaces with stiff plastic fiber bristled brush, or glass bead peen to remove carbon and scale.
NOTE: Do not glass bead peen parts until fluorescent penetrant (SECTION III) or magnetic particle (SECTION III) inspection has been performed.
(4)
Rinse thoroughly in clean tap water at 80 to 110F (27 to 43C).
WARNING: USE CORRECT PERSONAL PROTECTION. COMPRESSED AIR WILL CAUSE LOOSE PARTICLES THAT CAN GET IN YOUR EYES. COMPRESSED AIRFLOW CAN CAUSE CUTS, DO NOT POINT IT AT YOUR SKIN.
(5)
Pressure air-dry (20 psig (137,895 kPa) maximum) parts until free of moisture.
(6)
Preserve steel parts after cleaning by placing them in a clean container.
NOTE: Storage preparation requirements depend on the alloy content and how long it will be before inspection (if required) of the part will be completed.
(a)
Low alloy steel parts that will be subjected to magnetic particle inspection (SECTION VII) within eight hours may be left dry until inspected.
(b)
Low alloy steel parts that will be subjected to magnetic particle inspection (SECTION VII), but will be held longer than eight hours prior to inspection, shall be coated with corrosion-preventive compound (MIL-C-16173, Grade 3) (SECTION VII).
Cleaning
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(c)
Low alloy steel parts not subject to inspection, and those that have completed inspection, shall be placed in a solution of corrosion-preventive compound (MIL-C-6529, Type III) (SECTION VII) for three to five minutes. Place treated parts in clean container and store away from moisture and corrosive fumes.
(d)
Stainless steel and heat resistant alloy parts shall be kept dry and boxed for protection from physical damage.
(e)
Stainless steel of the 400 Series shall be placed in a solution of corrosion-preventive compound (MIL-C-6529, Type III) (SECTION VII) for three to five minutes.
J. Method No. 203K: Cleaning Titanium
Clean titanium parts as follows:
WARNING: SOLVENT VAPORS ARE TOXIC AND FLAMMABLE. DO NOT INHALE VAPORS. OBSERVE FIRE PRECAUTIONS.
CAUTION: DO NOT USE 1,1,1-TRICHLOROETHANE (MIL-T-81533) (SECTION VII) TO CLEAN TITANIUM PARTS. HIGH TEMPERATURE OPERATION OF TITANIUM PARTS AFTER CONTACT WITH CHLORINATED CHEMICALS CAN CAUSE PART FAILURE DUE TO CRACKS.
(1)
Clean surfaces with solvent (Federal Specification P-D-680, Type I) (SECTION VII) to remove oil and grease contamination.
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