TASK 70-43-29-380-001
1 . General.
A.Dry film lubricant varnishes are Molybdenum Disulfide and other lubricants dispersed in an inorganic binder and nonflammable solvent. They are applied with either an aerosol can or a brush. These dry film lubricant varnishes cure at ambient temperatures and humidity.
2 . Equipment.
A.An efficient ventilation system to remove and neutralize vapors.
B.A clean cloth to clean and remove excess lubricant.
3 . Materials.
NOTE:
All materials are used at ambient temperatures.
 
Solution/Product
Material Number
 
Solvent, Acetone
C04-003  
 
Solvent, Methyl-Ethyl-Ketone
C04-001  
 
Solvent, Isopropyl Alcohol
C04-035  
 
Air Drying, Dry Film Lubricant
C02-003  
 
Air Drying, Dry Film Lubricant
C02-004  
 
Tape, Paint Adhesion Testing
C10-189  
4 . Procedure.
A.Process a test coupon (a strip of flat sheet metal) along with the part to be dry-lubricant-coated. The test piece will be used for quality assurance purposes.
B.Measure the thickness of the test piece before you apply the lubricant if the process document specifies the thickness of an applied lubricant.
WARNING:
CLEANING SOLVENTS ARE FLAMMABLE, VOLATILE, AND TOXIC. DO NOT BREATHE VAPORS. USE IN A WELL-VENTILATED AREA OR USE A RESPIRATOR. USE PERSONAL PROTECTION EQUIPMENT. AVOID PROLONGED BREATHING OF VAPORS AND REPEATED OR PROLONGED CONTACT WITH SKIN AND CLOTHING.
C.Clean the part and the test piece with a cloth saturated with a solvent listed in Step 3, Materials, unless otherwise stated in the process document. Apply the lubricant within 15 minutes.
CAUTION:
DO NOT TOUCH THE PREPARED AREA OF THE PART WITH YOUR BARE HANDS OR EXPOSE THE AREA TO ANY OTHER TYPE OF CONTAMINATION. IF THE LUBRICANT IS NOT APPLIED WITHIN 15 MINUTES OF CLEANING, THE PART MUST BE CLEANED AGAIN BEFORE YOU APPLY THE LUBRICANT.
D.Apply masking to the part per the process document if specified.
E.Apply a dry film lubricant specified in Step 3.B. If you use an aerosol can to apply the lubricant, keep the spray nozzle approximately 8 inches (20 cm) from the surface of the part.
F.Make sure the coating thickness is approximately 0.0006-0.0012 inch (0.015-0.030 mm) unless specified differently in the process document. If the lubricant must dry between coats, allow 10-30 minutes of drying time between each coat.
CAUTION:
CLEANING SOLVENTS ARE FLAMMABLE, VOLATILE, AND TOXIC. DO NOT BREATHE VAPORS. USE IN A WELL-VENTILATED AREA OR USE A RESPIRATOR. USE PERSONAL PROTECTION EQUIPMENT. AVOID PROLONGED BREATHING OF VAPORS AND REPEATED OR PROLONGED CONTACT WITH SKIN AND CLOTHING.
G.Remove any overspray or excess lubricant with a clean cloth dampened with one of the solvents listed in Step 3, Materials.
H.Let the lubricant air cure at ambient temperature for the time specified by the lubricant manufacturer.
I.Measure the coating thickness if a thickness is specified in the process document. Apply more layers of lubricant as necessary and air dry between coats.
J.Remove the masking, if applied.
5 . Quality Assurance.
A.Do one of these tests on the test coupon that was processed with the part:
(1)Test with pressure sensitive tape:
(a)Apply a strip of pressure sensitive tape C10-189   to the test piece. Press the tape firmly to the piece.
(b)Pull off the tape.
(c)The coating shall not be lifted to expose any bare metal surface but a uniform deposit of powdery material clinging to the tape is acceptable.
(2)Test by scratching:
(a)Scratch the coating on the test piece with your fingernail.
(b)The coating shall not be lifted to expose any bare metal surface but uniform deposit of powdery material at the fingernail is acceptable.
B.Examine the coating on the processed part. It should have no sags, blisters, flakes, and foreign material. The coating should be smooth, uniform, and dark grey in color.
C.Remove the coating and reprocess the part if the coating fails any of these tests or examinations.