Source Reduction of ToxicsSource Reduction of ToxicsSource Reduction of ToxicsSource Reduction of Toxics
May 10, 2007May 10, 2007
Lockheed Martin Aeronautics Company
Cristy WilliamsonCristy Williamson
SITE 2SITE 2U-2 Upgrades/ U-2 Upgrades/
PDM/ Flight TestPDM/ Flight TestSITE 7SITE 7
SITE 8SITE 8Shipping/ReceivingShipping/Receiving
Air Force Air Force Plant 42Plant 42
LM Aero LM Aero Plant 10Plant 10
Marietta, GA
HQ – Fort Worth, TX
• R&D• Prototyping• Classified• Composites
F-117 Upgrades/ F-117 Upgrades/ PDM/Flight TestPDM/Flight Test
• P2 results in risk reduction through:– Incorporation into design
• Design for Environment
– Material Substitution– Recycling– Sharing Best Practices– Etc.
RISKRISK REDUCTIONREDUCTION
REDUCE TOXIC CHEMICAL USAGE BY 10% PER YEAR
(chrome and selected solvents)
Baseline: 7,924.0 lbs.
Goal: 5,800.0 lbs.
ANNUAL TOTAL 8,393.2 6,181.8 % REDUCTION -5.9 21.9
YEAR 2005 2006 2007
PERFORMANCE TRACK COMMITMENTSPERFORMANCE TRACK COMMITMENTS
1313.8
• Specialty Coating Reformulation:– Reduction in Methyl Ethyl Ketone (MEK).
• Electrodag 501/502 are MEK-laden.
– Alternative: Lower-VOC Water-Based Specialty Coating.
REDUCTION IN TARGETED PT CHEMICALSREDUCTION IN TARGETED PT CHEMICALS
• Reduction in Class II ODCs.– Remove products containing HCFC-141b.– Focus: Mold-Release Agents– Old Miller-Stephenson Chemical Products:
• MS-143DF bulk liquid• MS-122DF aerosol• MS-122N/CO2 aerosol
REDUCTION IN TARGETED PT CHEMICALSREDUCTION IN TARGETED PT CHEMICALS
• New Miller-Stephenson Chemical Products:– MS-143XD bulk liquid– MS-122AD aerosol
• Testing included:• Ease with which urethane part releases from tool/coupon• Appearance of urethane part• Hardness testing of cured urethanes• Crosscut tape adhesion testing on painted urethanes• Shop-employee feedback
REDUCTION IN TARGETED PT CHEMICALSREDUCTION IN TARGETED PT CHEMICALS
NON-CHROMIUM COATING SYSTEMSNON-CHROMIUM COATING SYSTEMS
* Turco 4215-NCLT alkaline clean, DeOxit 22L deoxidizer.
** Surface prep by Scotch-Brite/Bon-Ami.
*** Turco 4215-NCLT alkaline clean, Metal Glo 6 deoxidizer.
2000 Hour Neutral Salt Spray Corrosion Resistance
NON-CHROMIUM COATING SYSTEMSNON-CHROMIUM COATING SYSTEMS
Comparison of Deft MIL-P-85582 and MIL-P-23377 Non-Chrome Primers
Deft 44GN098
Water Reducible
VOC = 330 g/L
Sec-Butyl Alcohol: 12%
Nitroethane: 10%
Diethyl benzene: .01%
Deft 02GN084
Solvent-Borne
VOC = 337 g/L
Benzene,1-chloro-4 -trifluoro methyl: 16%
MnPK: 12%
MAK: 3%
NON-CHROMIUM COATING SYSTEMSNON-CHROMIUM COATING SYSTEMS
Comparison of Hentzen and Deft MIL-P-23377 Primers
Hentzen 16708
Solvent-Borne
VOC = 340 g/L
MAK: 25%
IPA: 5%
Benzyl alcohol: 5%
MIBK: 3%
MEK: 1%
• Evaluation of non-chromated coatings has been on-going since the 1990s.– Primer successes on aircraft.
• Commercial products are not quite there yet, but are getting very close.
• Our testing is an effort to identify a a total non-chromated system (pretreatment and coatings).
NON-CHROMIUM CONVERSION COATINGNON-CHROMIUM CONVERSION COATING
Contact: John Beale, [email protected], (661) 572- 7920
LOW-VOC MOLD-RELEASELOW-VOC MOLD-RELEASE
• Test & evaluation conducted in concurrence with low-VOC wipe-solvent research.
– More specifics on following slides.
• Effort is to identify replacement for: – Henkel Frekote 44-NC (746 g/L VOC)– Henkel Frekote 700-NC (754 g/L VOC)
• Products Evaluated:– Henkel Frekote 900-WB / 901-WB (0 g/L VOC)– McGee Industries Inc. MAC-507 (0 g/L VOC)– Zyvax Inc. Water Works Departure (0 g/L VOC)– Henkel Frekote 710-LV (115 g/L)
• Frekote 710-LV To-Do List:– Test & Evaluate– Conduct Shop Trials– Procure in Presaturated Wipers– Change Specifications
LOW-VOC MOLD-RELEASELOW-VOC MOLD-RELEASE
• Previous Approach – Focus on toxics
• Current Approach – Focus on quantity (usage)– Where can we get the biggest “bang for
our buck”?• Answer: Isopropyl Alcohol (IPA)
LOW-VOC WIPE SOLVENTLOW-VOC WIPE SOLVENT
LOW-VOC WIPE SOLVENT LOW-VOC WIPE SOLVENT
2005 VOC EMISSIONS
Other VOC21,540 lbs
55%
IPA VOC17,394 lbs
45%
38,934 lbs
4,857.29 lbs28%
12,537 lbs72%
• Test & Evaluation - Focus on tool-cleaning operations. – Steel– Aluminum– Composite– Foam
• Approximately 30 cleaners/dilutions evaluated. • Test and Evaluation included:
– Visual evaluation– Number of wipes/strokes required to remove contamination– Water-break evaluation– Corrosion testing– Fluid-soak testing– Lay-ups
» Paint-adhesion testing» Lap-shear testing
LOW-VOC WIPE SOLVENT LOW-VOC WIPE SOLVENT
LOW-VOC WIPE SOLVENTLOW-VOC WIPE SOLVENT
• Two products have passed final qualification requirements:
1) Acetone » Exempt from VOC-categorization in the local
Antelope Valley Air Quality Management District.
2) Ecolink 1171» Solvent blend containing PCBTF, methyl acetate,
and d-limonene.
• Wipe-Solvent Replacement Challenges:– Institute Presaturated Wipers.– Change Specifications.– Meet Environmental and Health/Safety
Requirements.– Change culture.
LOW-VOC WIPE SOLVENTLOW-VOC WIPE SOLVENT