1. Qualification Efforts
C-130 Non-Chrome
Qualification Efforts
Chrome-Free Coating System Technical Interchange Meeting
JANUARY 2018
Kevin Detring and Scott Jones
Material & Processes Engineering
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved.

2. Non-chrome projects
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2019
2020
Latest Gen NCP Flight Test
Non-Hex Cr IML Finish *
NC Fuel Tank Coating *
Latest Generation NCP *
NCP Flight Test
NCP Beach Exposure
Solvent-borne (SB) NCP for OML, Ph I *
SB NCP for OML, Ph II *
NCP for IML *
Water-borne NCP for OML *
Alt. for Chromated Sealants *
NC Conv. Coating for Touch-Up *
NC Conversion Coating – Immersion *
NC Sealants, Phase I and II *
Non-Hex Cr Anodize Seal *
* Funded by AFLCMC/WNVV Acquisition Environment and Health Risk Management Branch
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 2

3. Water-borne ncp for oml ph i
System approach – spray applied conversion coating, primer, and topcoat
24 candidate systems
Reduced Chrome = NCP with chromate conversion coating
Low-Chrome = ≤ 250 ppm Cr+6 in stack-up
Salt Spray – 3000 hrs
Filiform Corrosion
Galvanic Corrosion
Wet Tape Adhesion
Cross-Hatch Adhesion
Xenon-Arc & QUV-B Weather Resistance
Flexibility – Impact & Low Temp
Humidity Resistance
Fluid Resistance
Solvent Resistance
Strippability
C-130 Unique Substrate Compatibility
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 3

4. Water-borne ncp for oml ph i
3000 Hour Salt Spray
System 1: Alumigold APC (chromated control)
System 3: Alumigold-Deft 44GN098-APC (reduced chrome)
System 7: LCC2 (50ppm Cr+6)-Deft 44GN098-APC (low-chrome)
System 13: AC131-Deft 44GN098-APC (non-chrome)
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 4

5. Solvent-borne ncp for oml ph i
System approach Spray applied conversion coating, NCP, and topcoat
33 candidate systems
Salt Spray – 3000 hrs
Filiform Corrosion
Galvanic Corrosion
Wet Tape Adhesion
Cross-Hatch Adhesion
Xenon-Arc & QUV-B Weather Resistance
Flexibility – Impact & Low Temp
Humidity Resistance
Fluid Resistance
Solvent Resistance
Strippability
C-130 Unique Substrate Compatibility
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 5

6. Solvent-borne ncp for oml ph i
3000 Hour Salt Spray
S1 Control: Alumigold APC (chromated)
S2: Alumigold-MgRP-APC (reduced chrome)
S20: GN084-APC (non-chrome)
S21: TEP-APC (non-chrome)
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 6

7. Solvent-borne ncp for oml ph i
Preliminary Results
3 top systems selected for flight test and beach exposure
Alumigold MgRP + APC
BONDERITE M-NT GN084 + APC
BONDERITE M-NT TEP + APC
Final Results
2 systems performed similar to control
BONDERITE M-NT Deft 02GN084 + APC (non-chrome)
BONDERITE M-NT Hentzen 16708TEP + APC (non-chrome)
Alumigold MgRP + APC exhibited blistering
Additional testing identified (SBNCP Ph II)
Overcoating window, particularly for 02GN084
Repeat strippability using new LM paint strippers and those commonly used by USAF depots
Compatibility with PreKoted surfaces (at request of USAF)
Compatibility with reactivated aged primer
Rain Erosion
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 7

8. Ncp beach exposure
2 years at Battelle’s Florida Materials Research Facility
Reduced Chrome
Reduced Chrome
Chromated Control
Alumigold + MgRP + APC
Alumigold + 44GN098 + APC
Alumigold APC
Non-Chrome
Non-Chrome
GN084 + APC
TEP + APC
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 8

9. Ncp flight test Alumigold + Deft 44GN098 + Deft APC (reduced chrome)
Two C-130’s
Specific components
3-year planned duration
Evaluated top 4 systems from WB and SB OML projects
Alumigold + Deft 44GN098 + Deft APC (reduced chrome)
BONDERITE M-NT Deft 02GN084 + APC (non-chrome)
BONDERITE M-NT Hentzen 16708TEP + APC (non-chrome)
Alumigold + Akzo Nobel Aerodur 2100 MgRP + APC (reduced chrome)
Provided depot aircraft for flight test, obtained all necessary approvals, and applied candidate systems
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 9

10. Ncp flight test DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 10

11. Ncp flight test No color changes or chalking
3-Year Findings
Peeling issue with MgRP at ~21 months on aircraft (Charlotte);
no issues on
1+ mil thickness increase of MgRP system
All other systems
No color changes or chalking
No significant thickness changes
No uncommon adhesion issues
Minor rivet rash
A few, small areas peeled to substrate near protruding head fasteners
Little to no corrosion in bare areas exposed 2+ years
Great results with the two total non-chrome systems
BONDERITE M-NT Deft 02GN084 + APC (non-chrome)
BONDERITE M-NT Hentzen 16708TEP + APC (non-chrome)
Alumigold + MgRP + APC
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 11

12. Ncp flight test
PDM Inspection Findings
(69 months – 2199 flight hours)
MgRP system exhibited a few isolated blisters – active corrosion observed under some blisters
Greater number of chipped areas in MgRP system
Other 3 systems performed very well; equivalent to baseline finish
Only minor rivet rash
Hill AFB personnel satisfied with performance of candidate systems
(66 months – 1948 flight hours)
MgRP system – major failure
Other 3 systems performed very well
No notable difference between candidates and baseline finish
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 12

13. Latest generation ncp OML IML Focused on both OML and IML
System approach – conversion coating, primer, and topcoat
Paired NCP’s with non-chrome and chromated pretreatments (spray applied)
Used Extended Life Topcoat recommended by NCP manufacturer
IML
Paired NCP’s with 2 top-performing TCP candidates/processes from previous immersion project as well as control pretreatment
Immersion applied conversion coatings
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 13

14. Latest generation ncp Chromated Controls Total Non-Chrome
OML Systems
Total Non-Chrome
Reduced-Chrome
Salt Spray – 3000 hrs
Filiform Corrosion
Galvanic Corrosion
Wet Tape & Cross-Hatch Adhesion
Xenon-Arc & QUV-B Weather Resistance
Flexibility – Impact & Low Temp
Humidity Resistance
Fluid Resistance
Solvent Resistance
Strippability
C-130 Unique Substrate Compatibility
Beach Exposure –
2 Yr
Heat Resistance
Marking Window
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 14

15. Latest generation ncp OML 2-Year Beach Results
LG1 - Alumigold/02Y040A/Deft APC (control)
LG2 - Alumigold/02GN070A(Low-IR)/APC (control)
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 15

16. Latest generation ncp OML 2-Year Beach Results (cont)
LG3 - EAP-9/2100MgRP/Aerodur 5000
LG4 - RECC /02GN093/ Deft APC
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 16

17. Latest generation ncp OML 2-Year Beach Results (cont)
LG5 - RECC /97GY160
LG8 - BONDERITE M-NT 5700/53055GEP/35515APX
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 17

18. Latest generation ncp OML 2-Year Beach Results (cont)
LG9 - BONDERITE M-NT 5700/53094GEP(Low-IR)/35515APX
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 18

19. Latest generation ncp EAP-9/2100MgRP/Aerodur 5000
OML Total Non-Chrome System Results Summary
EAP-9/2100MgRP/Aerodur 5000
Not able to completely strip with chemical remover even with 20 hr dwell
Blistering on panel face in salt spray testing with C-130 Unique Panel Prep
30% increase in film thickness following xenon-arc exposure
LG3 - EAP-9/2100MgRP/Aerodur 5000 Blistering
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 19

20. Latest generation ncp RECC 1015-3021/02GN093/APC
OML Total Non-Chrome System Results Summary (cont)
RECC /02GN093/APC
Marginal performance in filiform testing
Some blistering after exposure to DI water (30 120°F)
Poor results in impact and low-temp flexibility
LG4 - RECC /02GN093/APC Low Temp Flexibility
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 20

21. Latest generation ncp RECC 1015-3021/97GY160
OML Total Non-Chrome System Results Summary (cont)
RECC /97GY160
Excellent corrosion resistance in standard beach exposure
Excessive color change in beach and weather resistance testing; Delta E’s > 2.5
Excessive chalking in beach testing; % compared to 17% for control
Significant film thickness drop in beach and weather resistance testing; ~10% compared to ~2% for controls
Very poor filiform corrosion resistance
Poor adhesion with C-130 Unique Panel Prep; not compatible with surfaces previously chromate conversion coated
LG5 - RECC /97GY160 Filiform
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 21

22. Latest generation ncp BONDERITE M-NT 5700/53055GEP/35515APX
OML Total Non-Chrome System Results Summary (cont)
BONDERITE M-NT 5700/53055GEP/35515APX
Top performing non-chrome finish system; performance comparable to control
Some difficulty stripping but acceptable times of 8 – 9 hours
35515APX showed no signs of chalking after beach exposure; better than control
Slightly more color change than desired in heat resistance, weather resistance, and beach exposure; Hentzen adjusted yellow pigment to correct color stability issue
Compatible with surfaces previously chromate conversion coated
Recommended for flight testing and potential implementation
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 22

23. Latest generation ncp BONDERITE M-NT 5700/53094GEP(Low-IR)/35515APX
OML Total Non-Chrome System Results Summary (cont)
BONDERITE M-NT 5700/53094GEP(Low-IR)/35515APX
Results very similar to BONDERITE M-NT 5700/53055GEP/35515APX
Corrosion resistance was slightly lower than the standard pigmented version
Recommended for flight testing and potential implementation
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 23

24. Latest generation ncp IML
Salt Spray
Filiform Corrosion
Galvanic Corrosion
Adhesion
Impact Flexibility
Fluid Resistance
Water Resistance
Humidity Resistance
Solvent Resistance
Aged Conversion Coating Compatibility
Reactivation Compatibility
Sealant Compatibility
Viscosity & Pot Life
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 24

25. Latest generation ncp Hentzen 53055GEP
IML Results – 2000 Hour Salt Spray
CCC/02Y040A (control)
CCC/53055GEP
TCP1/53055GEP
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 25

26. Latest generation ncp
IML Results Summary
Akzo Nobel Aerodur 2100 MgRP
Field blistering and adhesion failures in water resistance testing (DI water for 4 120°F); occurred with CCC and both TCPs
Blistered with all pretreatments in salt spray
Deft 02GN093
Promising results when paired with CCC
Poor salt spray results when paired with TCPs
Some field blistering and significant undercutting from scribe
Would require use of adhesion promoter in all sealing operations
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 26

27. Latest generation ncp Hentzen 53055GEP Top performer
IML Results Summary (cont)
Hentzen 53055GEP
Top performer
Good results with CCC and showed promise with TCP1
Irregularities in water resistance with TCP1
Initial testing
Blistered in primer only condition; no blistering when topcoated with MIL-PRF-85285
One panel blistered when topcoated with waterborne polyurethane topcoat
Storage Stability testing
No failures in any condition
Compatible with sealant; no adhesion promoter required
CCC/53055GEP recommended for potential implementation; further confidence could be gained from proposed flight testing
TCP1/53055GEP may be a viable option but water resistance testing needs to be repeated to determine if blistering was an anomaly
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 27

28. Solvent-borne ncp for oml ph ii
Candidate Systems
BONDERITE M-NT 5700/PPG 02GN084/PPG APC
BONDERITE M-NT 5700/Hentzen 16708TEP/PPG APC
Strippability
Overcoat Window
Reactivation of Aged Primer
Compatibility with PreKoted Surfaces
Rain Erosion – Whirling Arm
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 28

29. Solvent-borne ncp for oml ph ii
Strippability
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 29

30. Solvent-borne ncp for oml ph ii
Overcoat Window
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 30

31. Solvent-borne ncp for oml ph ii
Rain Erosion – Whirling Arm
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 31

32. Solvent-borne ncp for oml ph ii
Reactivation of Aged Primer (unsoiled and soiled)
All reactivation methods evaluated provided clean, reactivated surface for final finish system no matter initial finish or soiled condition
Good performance with 5700/16708TEP/APC system
Some 02GN084-to-APC adhesion issues
Compatibility with PreKoted Surfaces
No issues (adhesion or corrosion resistance) stripping LM applied candidate systems and refinishing with current USAF baseline finish PreKote/23377/APC
Candidate systems applied over previously PreKoted surfaces exhibited some field blistering in 3000 hour salt spray
Recommend verification salt spray be conducted if USAF interested in implementing either candidate system into depot operations
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 32

33. Ncp qualification summary
Top Alternatives To-Date
OML Applications
BONDERITE M-NT 5700/Hentzen 16708TEP/APC
Plan to implement
C-130 Material and Application specifications to be created
Exterior Finish drawing changes required
BONDERITE M-NT 5700/Deft 02GN084/APC
With exception of primer-to-topcoat overcoat issues, system performed well
Would consider approval as an alternate system if overcoat issues could be resolved
BONDERITE M-NT 5700/Hentzen 53055GEP/Hentzen 35515APX
BONDERITE M-NT 5700/Hentzen 53094GEP(Low-IR)/Hentzen 35515APX
IML Applications
CCC/Deft 44GN098
CCC/Deft 02GN084
CCC/Hentzen 53055GEP
TCP1/Hentzen 53055GEP?
New Non-Hex Chrome IML Finish project looking for IML stack-ups free of hexavalent chromium
Excellent performers
Flight testing planned
Water Resistance validation testing needed
DISTRIBUTION STATEMENT A – Approved for Public Release
© 2018 Lockheed Martin Corporation. All Rights Reserved. 33