Molykote® D-6600 Anti-Friction Coating
Molykote® D-6600 Anti-Friction Coating is a durable coating with a low coefficient of friction and good adhesion to metal. A reliable coating for clean, long-lasting lubrication.
Consumers demand durable, longlasting cars. Expectations for extended durability aren’t lessened for highstress components such as starter motors. Developed from proven Smart Lubrication™ solutions, MOLYKOTE® D-6600 Anti-Friction Coating delivers long-lasting performance that meets Tier 1 specifications while using standard equipment for spray-coating or dipspinning processes.
MOLYKOTE® D-6600 Anti-Friction Coating is a very durable coating with a low coefficient of friction and good adhesion to metal. This dry-film lubricant is suitable for the permanent lubrication of metal/metal and metal/plastic material pairings involving slow to mediumfast movements and medium- to lowpressure conditions. It can be used wherever oils or greases cannot be used for technical reasons or are undesirable because of the risk of soiling. MOLYKOTE® D-6600 Anti-Friction Coating has been proven in cycle-testing of starter motors and has many potential applications for metal parts such as door locks and metal/plastic contacts such as ball joints and window lifters.
Product description
- Polymeric resin system
- Organic solid lubricants
- Solvent
- Development target: Next generation of organic solid lubricants based on anti-friction coating with very low coefficient of friction and extended-service durability.
Performance advantages
- Excellent dry-lubrication properties
- Excellent adhesion to metals
- Excellent load-carrying capacity and low coefficient of friction at medium and low pressures
- Excellent wear protection
- Low coefficient of friction for metal/plastic pairings, especially at medium and low pressures
- Good corrosion protection
Key benefits
- Allows service-life dry lubrication of components made of metal/metal material pairings at medium and low contact pressures
- Allows service-life dry lubrication of components made of metal/plastic material pairings
- Allows dry lubrication of components when a fluid (oil/grease) is not desired or not possible
Advantages for challenging automotive applications
- Starter motor lubrication
Typical properties
These values are not intended for use in preparing specifications. Please contact your local MOLYKOTE® sales representative prior to writingspecifications on this product.
Application process
- Heat curing system; recommended curing schedule is 20 min @ 200ºC (object temperature time)
- Other curing schedules (i.e., reduced curing time) might be possible; need to be tested for each case
- Recommended dry-film thickness: 10-15 µm (AFC typical)
- Preferred application processes:
- Spraying
- Dip-spinning (for this process, viscosity might be adjusted according to form and size of parts to be coated)
- Thinner and application equipment cleaner: MOLYKOTE® L-13 Thinner
- Calculated coverage (application process losses excluded): approx. 18 m2/kg at 12 µm dry-film thickness
Low-pressure steel/steel material pairing test: Conditions
- Durability test
- Simulation of an automotive application
Low-pressure steel/steel material pairing test: Results
Medium-pressure steel/steel material pairing test: Conditions
- Durability test
- Simulation of an automotive application
- Cylinder (diameter: 11 mm; length: 15 mm)
- Disc (100Cr6)
- Parameters:
- Stroke: 3 mm
- Frequency: 25 Hz
- Load: 130 N
- Contact pressure (theoretical): 250 MPa
- Room temperature conditions
- Dry lubrication (only AFC)
- AFC applied on disc
- SRV III DC test machine
- Pretreatment: Mn-phosphating
Medium-pressure steel/steel material pairing test: Results
POM/steel material pairing test: Conditions
- Anti-noise tester
- As per VDA 230-206 test procedure
- POM vs. coated steel
- Material pairing plastic ball (see image)
- Ball diameter: 12.7 mm
- Stroke: +/- 2.5 mm
- Speed: 2 mm/s
- Load: 30 N
- POM ball: theoretical pressure: 120 N/mm2
- Climatic conditions: room temperature (23ºC, 45% RH)
- Test length: 2,500 cycles (durability test, ca. 4 h)
POM/steel material pairing test: Results
Wear marks – POM ball after test
PA/steel material pairing test: Conditions
- Oscillating tester
- PA vs. coated steel
- Material pairing plastic ball
- Ball diameter: 12.7 mm
- Stroke: +/- 4.5 cm
- Speed: 5 cm/s
- Load: 7 N
- For PA 6.6 ball: theoretical pressure: 60 N/mm2
- Climatic conditions: room temperature (23ºC, 45% RH)
- Test length: durability test, 1 h (1,000 cycles)
PA/steel material pairing test: Results
Wear marks – PA ball after test
Corrosion protection performance test: Conditions
- Evaluated with salt-spray testing (ISO 9227)
- The anti-friction coating works under the concept of isolation of coated surface from the environment
- Corrosion protection depends on:
- Substrate material type
- Surface pretreatment
- Form/typology of coated parts (plane, edges, hollow, etc.)
- Application process
- Dry-film thickness
Corrosion protection performance test: Results
Suitable applications
- Lock components subjected to medium pressures (pawls, catching plate, levers)
- Seat belt system components
- Seating system springs
- Armature cylinders (e.g., starters)
- Suspension system ball joints
- Stainless steel threaded connections
Key takeaway messages MOLYKOTE® D-6600 Anti-Friction Coating:
- Extensively improves service-life dry lubrication of metal/metal pairing components under low and medium contact pressures
- Extensively improves service-life dry lubrication of plastic/metal pairing components
- Can offer good corrosion protection
- Can be applied to parts using traditional painting application processes and equipment
