Molykote® D-6600 Anti-Friction Coating

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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

Molykote® D-6600 Anti-Friction Coating_2

 

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.

Properties Molykote D-6600

 

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

Molykote® D-6600 Anti-Friction Coating

 

Low-pressure steel/steel material pairing test: Results

Molykote D-6600_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_Molykote D-6600jpg

Medium-pressure steel/steel material pairing test: Results

Medium-pressure steel Results_Molykote D6600

 

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)

Molykote® D-6600 Pairing plastic ball

 

POM/steel material pairing test: Results

POM-steel material pairing test_Results

Wear marks – POM ball after test

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

PA-steel material pairing test_Results

Wear marks – PA ball after test

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

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

 

 

We are your technical partner.

If you have any questions or want to find out more about the possibilities for your industrial application, please complete the contact form and one of our experts will be in touch.

If you have a problem with industrial adhesives, sealants, lubricants or electronic protection products and require advice, you can contact our technical support service. Our team can help you to optimize your processes and applications.

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