F85345
Corogard Viscosity 500
51-21-131 Figure 702 Feb 15/73
Page 714
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
h) Allow a minimum of 30 minutes between first and subsequent cross spray coats.
NOTE: On horizontal surfaces where there is no danger of runs or sags, this drying time between coats may be omitted.
i) Apply sufficient cross spray coats to obtain a total dry film thickness of 2 to 3 mils.
NOTE: The EC-843 and EC-843S Corogard material will be slightly over-pigmented to reduce effect of bronzing; therefore, some rub off of excess aluminum pigment may occur but is not detrimental to quality.
j) Allow topcoat to air dry a minimum of 24 hours at 65 to 85°F.
NOTE: Cure may be accelerated by heating the surface to 125 + 5°F for 2 hours.
5) Aluminized Coating Aeroflex G12E25 a) Agitate the material thoroughly by hand or power mixer for 10 to 15 minutes until the aluminum pigment is uniformly dispersed.
NOTE: Avoid entrapment of air bubbles due to mixing.
Thinning is not usually required for airspray if thinning is required, use C25/90S thinner up to 20% by volume of the base. For airspray (suction cup) thin 20% (maximum) by volume of the base.
The useable pot life of this material is 4 hours (no temperature restrictions necessary).
b) Reactivate and touch up surfaces coated with BMS 10-11 and BMS 10-20 primer per 51-21-51. Allow primer to dry per 51-21-51 prior to application of corrosion inhibiting coating.
c) Strain the "ready to spray" mixture through clean cloth or a sieve prior to using.
500
Feb 20/90 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 51-21-131 Page 715
d) Spray surface with sufficient cross coats to obtain a total dry film thickness of 2 to 3 mils.
NOTE: If dry spray occurs when using Aeroflex G12E25, reduce atomizing air pressure or thin slightly with C25/90S thinner.
e) Allow topcoat to dry, air dry at 65 to 85°F a minimum or 4 hours before outdoor exposure and 24 hours before service.
NOTE: Cure may be accelerated by heating the surface to 125 + 5°F for 2 hours.
(c) Repair and rework 1) Areas with minor damage such as scratches and gouges should be sanded smooth with 280 grit or finer abrasive paper and cleaned with clean rags wetted with toluene or xylene. 2) Apply primer and Corogard or Aeroflex overcoat per par. E. Featheredge all spot painting. For minor touchup, brush application is recommended. 3) Aged areas of EC-843 or EC-843S Corogard or Aeroflex to be over coated shall be thoroughly solvent cleaned with toluene or xylene followed by sanding with 280 grit or finer abrasive paper. Remove sanding residue by wiping with clean cloth wetted with toluene or xylene. Before the solvent evaporates wipe dry with clean cloth.
4) Repair and overlap areas shall not exceed a total dry film thickness of 5.0 mils.
NOTE: Newly applied EC-843 and EC-843S Corogard will not match color of adjacent Corogard finishes surface. The repaired area will match adjacent color in approximately 60 days. Allow to dry 4 hours minimum at 65 to 85°F prior to service use.
500
51-21-131 Page 716 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Feb 20/90
HIGH TEMPERATURE COATING FOR TITANIUM
1. General
A. This subject contains application procedures for Andrew Brown B-2000 coating and BMS 10-82 coating. Either coating may be used. Application of BMS 10-82 requires removal of part. B-2000 and BMS 10-82 coatings are not compatible.
2. Application of B-2000 Coating
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