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Proven Performance
• Outperformed other pretreatments in over a decade of testing
• Recognized with approvals – commercial, military, general aviation
• Tested safe and improves adhesion on a wide variety of substrates
To compare pretreatment performance one 737-800 was pretreated with a chromate conversion coating and another with PreKote Surface Pretreatment (October, 2004). Comparative photos were taken upon inspection (July, 2006) of each aircraft’s nose section 41 AFT of radome, demonstrating PreKote’s superior performance.
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INTENDED USES
PreKote replaces the use of both chromate and non-chromate conversion coating systems, replacing acid etches, solvent washes, and other toxic substances on metal and composite substrates prior to priming and painting for many applications. Also used as an adhesion promoter for metal to metal bonding, PreKote is a fl exible surface pretreatment which can be adapted to virtually any paint or bonding process including large surface area paint jobs, immersion processes, and touch-up applications. |
| TESTED SAFE ON |
| Aluminum |
Composites |
| Steel |
Galvanized Surfaces |
| Magnesium |
Plastic Surfaces |
| Titanium |
CRES |
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PHYSICAL & CHEMICAL PROPERTIES:
Boiling Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219°F (104°C)
Freezing Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18°F
pH (concentrate) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10.0-11.5
VOC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69.5 g/L
Evaporation Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . .Less Than Water
Specifi c Gravity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.997
Vapor Pressure . . . . . . . . . . . . . . . . . . . . . . . . . .0.02mm Hg at 20°C
Vapor Density . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Water Solubility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100%
Biodegradable Rate. . . . . . . . . . . . . . . . . . . . . . . . . +90% in 28 days
Appearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clear Amber Liquid
Odor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Odorless
Rinsibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .No Visual Residual
Application Temp. . . . . . . . . . . . . . . . . . . . . . . . . . 40-110°F (4-43°C)
Application Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0-100% |
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| APPROVAL/CERTIFICATIONS |
Boeing Commercial
Aerospace Group |
EPA – Non CIU Status |
Boeing Mesa
US Army Apache |
US Air Force TO 1F-1A-23 |
| US Air Force TO 1F-4C-3-1-6 |
| US Air Force TO 1-1-8 |
US Air Force TO 1T-16A-23 |
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PreKote approvals and certifi cation are always expanding. For more information on the following approvals/certifi cations or to inquire on additional approval/certifi cations, please contact a Pantheon Chemical technical representative.
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PERFORMANCE RESULTS
| Test Description |
Test Name |
Results |
| Salt Spray |
BMS 10-72, Test #20a ASTM B117 |
Pass |
| Filliform Corrosion |
BMS 10-72, Test #20b |
Pass |
| Rain Erosion |
BMS 10-72, Test #23 |
Pass |
| Flexibility |
ASTM D4145 (passes 1/8”
Mandrel Bend Test) |
Pass |
| Wet Tape Adhesion |
BMS 10-72, Test 16 |
Pass |
| Corrosion Resistance |
ASTM G85 Annex 4 |
Pass |
| Hydrogen Embrittlement |
ASTM F519-97 |
Pass |
| Paint Softening |
BMS D6-17487 ASTM F502 |
Pass |
| Humidity Resistance |
BMS 10-11, Test 24.8.2.16 |
Pass |
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| PRETREATMENT PROCESS |
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Conversion Coating |
| De-Seal |
De-Seal |
Mask for Sealant &
Pretreatment |
Mask for Sealant |
| Re-Seal |
Alkaline Wash /Pole Scrub |
Sealant Inspection
De-Mask Sealant |
Water Rinse |
| Water Rinse for Dust |
Dry |
| PreKote Application/Agitation |
Re-Seal |
| Water Rinse |
Sealant Inspection
De-Mask Sealant |
| Water Break |
Mask for Acid |
| Inspection |
Inspection |
| Dry |
Acid Application/Pole Scrub |
| Mask for Primer |
Water Rinse |
| STEPS NOT REQUIRED |
Water Break |
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Inspection |
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Conv. Coating Application |
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Water Rinse |
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Water Break |
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Inspection |
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Dry |
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Solvent Wipe/Tack Rag |
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Mask for Primer |
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Economic Advantage
• Dramatically reduces expensive pretreatment process time
• Replaces at least four chemicals used with other processes
• Cuts costs in shipping, PPE, wastewater treatment and storage
Cost comparison case study on a regional size aircraft. By switching to ProKote this customer gained 24% total cost savings, reducing process time by 46% (6 process hours).
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HEALTH & SAFETY
COMPARISON |
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Non-Chromated
Conversion Coating |
| pH |
10.0-11.5 |
2.0-3.0 |
| Corrosive |
Safe,
Buffered Alkali |
Hazardous,
Strong Acid |
Readily
Biodegradable |
Yes |
No |
Decomposition
of Products |
None |
TOXIC
May liberate corrosive
hydrogen fluoride
gas upon decomposition.
Fluoride is a suspected
carcinogen - linked to
osteosarcoma (bone cancer). |
Categorical
Industrial
User (CIU) Status |
No |
Yes |
Personal
Protection
Equipment (PPE) |
Goggles and Gloves |
Full Face Shield,
Impervious Gloves,
Apron & Boots.
May Require
Respirator. |
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Environmental, Health, and Safety
PreKote is chromium-free, non-toxic, non-hazardous, non-fl ammable, noncorrosive,CFC free, ODS free, odor free, and readily biodegradable upondisposal. PreKote does not require additional HAZMAT shipping charges andcan reduce rinse water usage and potentially eliminate waste water treatment from many processes.
The US Environmental Protection Agency (EPA) awarded PreKote for having environmentally preferable chemistry as a designation in the Design for the Environment (DfE) award. The EPA has also determined that PreKote is NOT one of the six core metal fi nishing effl uent operations and does NOT trigger categorical industrial user (CIU) status. There are no Federal regulations restricting the disposal of PreKote into municipal wastewater systems; however please consult with your local municipality before disposing of product. |
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PreKote’s innovative formulation is recognized by a partnership with Design for the Environment. Hill Air Force Base was awarded the EPA Environmental Achievement Award for replacing chromate conversion coatings with PreKote in its painting facility. Sheppard Air Force Base was nominated for the White House Closing the Circle Award for its use of PreKote. |
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MSDS COMPARISON WITH TRADITIONAL CHROMATE
CONVERSION COATINGS |
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CHROMATE CONVERSION COATINGS |
| pH |
10.0 - 11.5 |
1.3 - 3.3 |
| Corrosive |
SAFE, Buffered Alkali |
HAZARDOUS, Strong Acid |
| Chronic Toxicity |
NO |
YES |
| RCRA Corrosive Waste (D002) |
NO |
YES |
| Biodgradable |
YES |
NO |
| NFPA Health |
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| Hazardous 29 CFR 910.1200 |
NO |
YES |
| Decomposition Products |
NONE |
TOXIC |
| SARA 311 / 312 |
NONE |
ACUTE/CHRONIC** |
| Carcinogen |
NO |
YES |
| Reactivity |
NONE |
Strong alkalis, glass, concrete, certain metals, silica containing materials, rubber, leather. |
| 40 CFR Part 433.10(a)* |
NOT REGULATED |
REGULATD |
| Catgorical Industrial User (CIU) Status |
NOT (does not trigger CIU status) |
YES |
* EPA Memorandum National Regulatory Determination for the PreKote Surface Preparation Process, April 1, 2003.
** SARA 311/312: CCC users, along with people exposed to waste strams and bi-products containing CCC are at higher risk for cancer, OSHA regulations require users handing CCC & CCC-based products wear full hazardous materials sults and forced air breathing systems. |
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Safety Benefits
• Replaces toxic hexavalent chromium used in other pretreatments
• Awarded with EPA non-CIU (Categorical Industrial User) status
• Eliminates or reduces the amount of wastewater treatment required
PreKote’s formulation is recognized by a partnership with Design for the Environment. Hill Air Force Base was awarded the EPA Environmental AchievementAward and Sheppard Air Force Base was nominated for the White House Closing the Circle Award for their use of PreKote.
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