LF4 - polymeroxid low frictionpolymeroxid® LF4

LOW FRICTION - not only at home on the race track!

Materials: AlMg4,5Mn, Specification: 25 µm polymeroxid®_LF4® + PTFE
Materials: AlMgSi1, Specification: 25 µm polymeroxid®_LF4® orange
Materials: AlZnMgCu1,5, Specification: 30 µm polymeroxid®_LF4®
Materials: AlZnMgCu1,5, Specification: 20 µm polymeroxid®_LF4® gold

Our polymeroxid®-LF4 process creates a novel special anodised coating for applications where surface smoothness is the main focus. In comparison with xH4® the hardness of the coating is somewhat reduced, but the frictional characteristics have been further optimized. When the right material is chosen, excellent decorative effects can be achieved, whereby new fields of application are opened up for which hard anodising was previously not an option.

polymeroxid®-LF4 is in standard use by major manufacturers for the piston ways of shock-absorber elements. Besides the required wear-resistance, the best-possible frictional characteristics are achieved.

polymeroxid®-LF4 produces the smoothest hard-anodised surfaces on the market.


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In this novel process the frictional characteristics and surface smoothness are optimized, while the surface hardness is somewhat reduced in comparison with the xH4®-process. In this case the completely new polymeroxid®-matrix plays its full advantage. LF4 is the process of choice when it comes to sliding applications and low initial breakaway torque is vital.

polymeroxid®-LF4 creates the smoothest hard-anodised surfaces on the market.


Polymeroxid LF4

gute Härte bei red. Sprödigkeit verbessertes Verschleißverhalten hoher sehr gutes Gleitverhalten sehr dekorative Oberflächehoher Korrosionsschutz

Properties of eloxal/anodising:

  • completely new polymeroxid®-matrix
  • the smoothest hard-anodised surfaces on the market
  • very high abrasion resistance 
  • high hardness of about 450 HV0, 25 (7075-T6) 
  • Reduction of the slip-stick effect 
  • best friction properties 
  • protects against cold welding
  • extremely good bonding properties with top-coatings 
  • extrem strength of alternating bending strength


The materials AlZnMgCu1,5 (7075) and AlMgSi0,5/1,0 (6060/6082) are most suitable.

Suitability of the most important alloys for anodising

Dimensional accuracy:

The polymeroxid®-LF4 coating grows out of the base material by 40% of its total thickness (see diagram on left). A 25µm surface layer means therefore a growth of 10µm (or 20µm on diameter). The optimal coating thickness ranges between 20 and 25 μm.

Hardness of coatings:

The effective hardness achieved depends very much on the base material used. In the case of our LF4 process it usually lies in the range 400 MHV0,026 (7076 T6) or above.

Areas of application:

• Automation technology • Precision Engineering • Hydraulics • Food Industry • Aviation • Engineering • Medical engineering • Off-shore applications • Petrochemical • Pharmaceutical • Pneumatics • Racing • Robotics • Packaging machines

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