(2)
B00316 Solvent - Aliphatic Naphtha TT-N-95
(3)
G00000 Paper - Abrasive, 100 to 250 (Tyler Series) Mesh Silica, Alumina or Silicon Carbide
(4)
G00000 Gloves - Clean, White Cotton or Disposable Polyethylene Gloves
(5)
C00251 Coating - BMS 14-4, Type II, Sermetel 249
(6)
C00251 Coating - Catalyst, BMS 14-4, Type II,
Sermetel No. 273
(7)
G00500 Brush - Rigid Bristle
(8)
G02023 Wheel - Buffing, Cotton Flannel
C. Prepare the Parts
S 157-002-B00
WARNING: DO NOT GET FINISHES, CLEANERS, THINNERS AND SOLVENTS IN YOUR
_______ MOUTH OR EYES, OR ON YOUR SKIN OR CLOTHES. DO NOT BREATHE THE FUMES FROM THESE MATERIALS. MAKE SURE THE AIR FLOWS FREELY THROUGH THE WORK AREA. USE THE NECESSARY RESPIRATORY PROTECTION. KEEP THESE MATERIALS AWAY FROM SPARKS, FLAME AND HEAT. THESE MATERIALS ARE POISONOUS AND FLAMMABLE AND CAN CAUSE INJURY OR DAMAGE.
(1) Remove the coating.
(a)
Soak the parts fully in Turco 4181 (1-2 pounds for each gallon of the solution) at 190 to 210°F until there is no more coating on the parts.
(b)
Flush the parts with water.
(c)
Put the parts in an oven at 200 (| 25)°F to dry.
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(2) Clean the parts with solvent.
(a) For parts made from titanium or its alloys, clean with nonchlorinated solvent.
NOTE: Do not use chlorinated solvent on titanium.
____
(b) For parts made from ferrous alloys, clean with solvent or clean by vapor degreasing.
S 147-004-B00
(3)
Remove grit with a clean 100 to 250 (Tyler Series) abrasive paper.
S 167-005-B00
(4)
Clean the parts with compressed air to remove dirt and other contamination.
NOTE: After you clean the parts, do not touch the parts with your
____ bare hands. Use clean, white cotton gloves when you touch the parts.
S 957-006-B00
(5) Put a cover on the parts until you apply the coating.
(a) Make sure you apply the coating in 4 hours.
D. Procedure
S 377-007-B00
(1) Apply the inorganic protective coating.
(a)
Fully mix the material before you use it.
(b)
Use a spray equipment or an electrostatic spray equipment to apply the Sermetel 249.
(c)
Apply the Sermetel 249 until you get a constant, smooth, gray layer.
(d)
Let the parts dry for 30 minutes at ambient temperature.
(e)
Put covers on the adjacent areas.
(f)
Apply one layer of the Sermetel 273 catalyst to the surface.
NOTE: Do not mix the coating with the catalyst.
____
(g)
Let the surface dry for 16 hours, or 4 hours at 300 (|50)°F.
(h)
Make sure you can see no bubbles or runs on the dry surface.
(i)
Make sure the coating is 0.002 to 0.003 inch thick.
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(2) Rub the surface with a rigid bristle brush or a soft cloth buffing wheel until you get a smooth, shiny finish.
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