(1)
Clean surfaces with solvent (Federal Specification P-D-680, Type I) (SECTION VII) to remove oil and grease contamination.
WARNING: USE CORRECT PERSONAL PROTECTION. ALKALINE CLEANING SOLUTIONS ARE HAZARDOUS. AVOID INHALING FUMES OR MIST. AVOID CONTACT WITH SKIN. AFTER USE, WASH HANDS AND FACE THOROUGHLY.
(2)
Immerse parts in alkaline cleaner solution (Method No. 202A) for five minutes minimum.
(3)
Scrub surface with a soft fiber bristled brush to remove surface contamination.
NOTE: If old gaskets or sealing compounds are present, carefully lift softened gaskets with knife blade and scrape surface clean.
(4)
Rinse parts with 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 to dry part.
WARNING: USE CORRECT PERSONAL PROTECTION. DE-OXIDIZER SOLUTIONS ARE HAZARDOUS. AVOID INHALING FUMES, DUST, OR MIST. AVOID CONTACT WITH SKIN. AFTER PREPARATION, WASH HANDS AND FACE THOROUGHLY.
CAUTION: DO NOT ALLOW PARTS TO REMAIN IN CONTACT WITH DE-OXIDIZING SOLUTION LONGER THAN THREE MINUTES OR CHEMICAL ETCHING WILL OCCUR.
(6) Treat bare areas with de-oxidizing solution (Method No. 202D) for one to three minutes. Repeat previous Steps (3) and (4) to rinse and dry part.
Cleaning
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WARNING: USE CORRECT PERSONAL PROTECTION. CHROMATE CONVERSION COATING SOLUTIONS ARE HAZARDOUS. AVOID INHALING FUMES, DUST, OR MIST. AVOID CONTACT WITH SKIN. AFTER PREPARATION, WASH HANDS AND FACE THOROUGHLY.
(7)
Coat treated areas with chromate conversion coating solution (Method No. 202B). Allow area to remain wet for one minute.
NOTE: Maintain the pH of the chromate conversion coating solution (Method No. 202B) at 0.9 to 1.0 by adding chromic acid flake (SECTION VII) or nitric acid (Federal Specification A-A-59105) (SECTION VII) to the solution as necessary.
(8)
Rinse parts with 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.
(9)
Pressure air-dry (20 psig (137,895 kPa) maximum) to remove excess water from part.
(10)
Dry in oven at a temperature not to exceed 160F (71C).
(11)
Store parts in dry place away from corrosive fumes.
F. Method No. 203F: Cleaning Corroded Aluminum Clean corroded aluminum parts as follows: WARNING: SOLVENT VAPORS ARE TOXIC AND FLAMMABLE. DO NOT INHALE VAPORS. OBSERVE FIRE PRECAUTIONS.
CAUTION: CORROSION MAY BE CAUSE FOR REJECTION OR REPAIR OF A PART. REFER TO INSPECTION (SECTION III) AND/OR REPAIR (SECTION IV) WHENEVER CORROSION APPEARS TO BE BEYOND SURFACE FINISH.
(1)
Clean surfaces with solvent (Federal Specification P-D-680, Type I) (SECTION VII) to remove oil and grease contamination.
WARNING: USE CORRECT PERSONAL PROTECTION. ALKALINE CLEANING SOLUTIONS ARE HAZARDOUS. AVOID INHALING FUMES OR MIST. AVOID CONTACT WITH SKIN. AFTER USE, WASH HANDS AND FACE THOROUGHLY.
(2)
Immerse parts in alkaline cleaner solution (Method No. 202A) for five minutes minimum.
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