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C-5 Corrosion Prevention Compound CPC Application Program

Introduction. This work is being performed under an OSD initiative to fund corrosion prevention and control projects that would provide rapid, measurable, corrosion benefit to weapon systems.WR-ALC received matching funds for conducting a field trial of proven corrosion prevention compounds (CPC)

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C-5 Corrosion Prevention Compound CPC Application Program

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    1. C-5 Corrosion Prevention Compound (CPC) Application Program Dan McTish / Scott Jones Lockheed Martin Aeronautics Company 770-494-4489 dan.j.mctish@lmco.com scott.a.jones@lmco.com

    2. Introduction This work is being performed under an OSD initiative to fund corrosion prevention and control projects that would provide rapid, measurable, corrosion benefit to weapon systems. WR-ALC received matching funds for conducting a field trial of proven corrosion prevention compounds (CPC) on operational aircraft. WR-ALC Program Manager Mr. Buc McRory C-5 Corrosion Manager DSN 468-6663 Comm: 478-926-6663

    3. C-5 CPC Team Team composed of technical experts from all associated fields. WR-ALC (Buc McRory, Joel Mixon) USAF Corrosion Office (Dick Kinzie) USANG Corrosion Office (Jerry Powell) HQ/AFRC (Mark McIntosh) 439 AW / Westover ARB (SMSgt Anthony Trombley, MSgt Robert Ivey) 433 AW / Lackland AFB (MSgt Nick Peche, MSgt Osvaldo Villarreal) 105AW / Stewart ANG (Vincent Lepore, Stanley Hyla) Battelle (Bill Abbott) SAIC (John Lindsey) S&KT (Jill Ullett, Kim Ayer, Charlie Gibbs) Aging Aircraft System Squadron (Major Timberlyn Harrington) University of Virginia (Rob Kelly)

    4. Contract Plan CPC to be applied to corrosion-prone areas on 2 or 3 aircraft at Lackland AFB (May), Westover ARB (June) and Stewart ANG (June). CPC performance will be monitored for a period of 24 months. Copper sensors (unobtrusive) from Battelle will be installed. A few Steel sensors (short life) will also be installed. Coated and Uncoated Sensors installed in each area. Download data from sensors at 6, 12, and 18 months. Data will be used to determine: Reapplication intervals for CPC Fluid contact within area Touch-up of CPC is anticipated during verification process. Results will be considered for CPC applications to entire fleet through T.O. 1C-5A-23.

    5. CPC SELECTION Types Characteristically, there are three types of CPC’s. Thin Film Displace water and penetrate voids in faying surfaces, cracks, and around fastener heads. Less effective in areas of high water runoff when compared to waxy or hard film compounds. Waxy Non-water displacing or barrier type compounds. Do not penetrate faying surfaces very well. No planned use of these compounds at this time. Hard Film Penetrating, water-displacement capabilities along with barrier type performance with one product. Penetrate voids, cracks, or faying surfaces and displace moisture. Cures to a very firm, non-tacky, barrier type film.

    6. CPC SELECTION Re-Application Considerations All are considered temporary when compared to the more durable paint type finishes like epoxy primer and polyurethane topcoats. Require periodic reapplication and/or touch-up to remain effective. Sensor Data will be used to determine reapplication intervals. Reapplication intervals expected to be anywhere from 1 month to several years.

    7. CPC SELECTION Decision Process Data Used to Select CPC: Each Treatment Area Corrosion type (SCC, exfoliation, paint degradation, fluid entrapment, condensation, or a combination) Reapplication intervals Material (ferrous/non-ferrous) Existing finish Environmental influences wheel well vs crown skin

    8. C-5 CPC TREATMENT AREAS SELECTION PROCESS Data Used to Select Corrosion Prone Areas: CPAB, ASIP, FSIP, PIWG (User Conferences) T.O. 1C-5A-23 (Corrosion Manual) AFTO 107, AFTO 202, AFTO 95 (Discrepancy Forms) FODATS, STFS (Discrepancy Databases) Telecom, Email (Open Communication) Candidate Treatment Areas were Finalized Based Upon the Following Requirements: Accessibility (Base level) Varying environmental conditions Data applicable to multiple areas Ability to be combined with other treatment areas to determine any adverse reactions between CPC, while reducing cleaning area .

    10. C-5 CPC TREATMENT AREAS NLG Wheel Well – Aft Bulkhead (FS 664) – LHS Only

    11. C-5 CPC TREATMENT AREAS MLG Mainframes (FS1303/1383/1523/1603) – LHS Only

    12. C-5 CPC TREATMENT AREAS MLG Aft Bulkhead (FS1638) – LHS Only

    13. C-5 CPC TREATMENT AREAS Keel Beam Vertical Panel – LHS Only

    14. C-5 CPC TREATMENT AREAS Keel Beam Horizontal Shelf – LHS Only

    15. C-5 CPC TREATMENT AREAS Forward Ramp – Tiedown Receptacles

    16. C-5 CPC TREATMENT AREAS Fuselage Belly Skins from FS1106 to FS1148 – LHS Only

    17. C-5 CPC TREATMENT AREAS Fuselage Belly Skin Fluid Trap at FS1106

    18. C-5 CPC TREATMENT AREAS Bulkhead End Fittings at FS1106 & FS1148 – LHS Only

    19. C-5 CPC TREATMENT AREAS Intermediate End Fittings at FS1128 & FS1168 – LHS Only

    20. C-5 CPC TREATMENT AREAS Chine Cove from FS1884 thru FS1964 – RHS Only

    21. C-5 CPC TREATMENT AREAS Skin, Frames & Stringers – FS1024 to FS1064, LBL27 to RBL27

    22. C-5 CPC TREATMENT AREAS ECS Room Skin & Stringers – FS1004 to FS1106

    23. C-5 CPC TREATMENT AREAS Floor Panel – Behind Troop Latrine – RHS Only

    24. C-5 CPC TREATMENT AREAS UnPressurized – Skin, Frames & Stringers – RHS Only

    25. C-5 CPC TREATMENT AREAS CPC Selection

    26. T.O. INCORPORATION CPC application procedures will be verified during CPC applications by vendor. Lockheed will provide T.O. source data to WR-ALC to submit for publication in T.O. 1C-5A-23. Depot and base personnel input will determine best time to apply CPC into existing inspection intervals. Maintenance work cards (T.O. 1C-5A-6WC) will be modified as necessary. PDM work cards will be modified as necessary.

    27. PROGRAM SCHEDULE

    28. CLOSING REMARKS / ADJOURN QUESTIONS & COMMENTS

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