Minimum coefficients of friction
What is the purpose of anti-friction coatings?
What is the purpose of anti-friction coatings?
Robust anti-friction coatings become necessary whenever components are continuously subjected to frictional forces. When properly coated, however, the material remains intact and protected for a long time. Having intensively dealt with this topic, our surface technology experts have created durable surface coatings for many applications.
GLISS-COAT® – custom anti-friction coating
GLISS-COAT® describes a range of dry lubricant coatings developed by Aalberts surface treatment. While these functional anti-friction coatings reduce friction and wear, they also avoid squeaking and creaking noises. Once applied, most of the GLISS-COAT® coatings are a matte dark gray or black. When pressurized, they take on a shiny appearance and their coefficient of friction decreases.
Depending on the process and your company's specific requirements, the coating is either sprayed on or applied in immersion centrifuges. Both the coating thicknesses and their tolerances are assured by largely automated application methods. GLISS-COAT® systems consist of organic binding systems which, depending on the process, are filled with different solid lubricants. Depending on the process, GLISS-COAT® coatings are either sprayed on or applied in coating drums. The thickness tolerances of these functional coatings may be adjusted. Depending on the process, the adjustment range is between +/- 10 µm and/or +/- 15 µm. Both the coating thicknesses and their tolerances are assured by largely automated application methods. Depending on the coating method used, it is possible to coat all technically relevant metals, light metals and plastics. However, we are always willing to go the extra mile for our customers and to think outside of the box. We have developed, for example, GLISS-COAT® coatings for special applications: Our range of successfully coated materials now also includes paper, fleece, plastic and metal foils as well as ceramics. This needs-based modification is possible, because GLISS-COAT® coating systems are our in-house developments.
Below you will find some of the components we have coated with GLISS-COAT®:
Moving vehicle interior components, e.g.
Compression springs for shock-absorbing systems
Seat locking mechanisms
GLISS-COAT® coating systems are primarily used in the automotive industry, in analytical applications and in lignite mining. However, this type of coating is also frequently used as surface finish in medical engineering, the furniture industry, solar engineering and wind energy engineering.
GLISS-COAT® FLOCK – for improved shock absorption
GLISS-COAT® FLOCK is a functional anti-friction coating consisting of a combination of low-friction adhesive and polymer fibers. The first step of this functional coating technique involves the application of GLISS-COAT® adhesive to the workpiece surface. After that, the polymer fibers are embedded in the coating while it is still wet.
GLISS-COAT® FLOCK coatings aim at increasing the component's capacity to absorb shocks and eliminate noises. Thanks to special additives, the coating system moves toward the fiber tips. These movements within the tribological system create a lubricant film on the individual fibers so that the wear behavior improves significantly. A special post-treatment can further enhance this effect and optimize the run-in behavior. Apart from that, the coating has positive surface properties, such as flexible tolerance compensation, gliding properties and corrosion resistance.
GLISS-COAT® FLOCK can be applied to phosphate, anodized and sand-blasted metal surfaces as well as to plastics. Partial coatings, e.g. on the exterior of a spring, are feasible as well.
In general, it is possible to coat the following components:
- All kinds of springs
- Locking pins
- Sliding mechanisms
- Guide rails
HMF® – anti-friction coating with a unique micro finish
HMF® is a multi-layer coating process suitable for almost all metallic alloys. A series of independent processing steps creates a very hard, ultra-smooth, reflective or glossy micro finish. The HMF® coating process ensures permanent dry lubrication accompanied by improved surface hardness.
HMF® coatings are used, inter alia, in the following industries: cosmetics industry, plastic injection molding and extrusion, aviation, paper, film and foil production, tobacco industry, packaging industry. Typical components include calender rolls, pistons, ball valves and seats, cams, embossing tools, slides, locking mechanisms or funnels.
What can be done to reduce or rather eliminate squeaking, cracking, rattling noises and so on?
Depending on the type of noise and application, your components can be coated with GLISS-COAT® or GLISS-COAT® FLOCK.
Is there any possibility to replace grease?
It is absolutely possible to replace grease by GLISS-COAT® coatings.
What materials can be coated with GLISS-COAT®?
With carefully coordinated pre-treatment, GLISS-COAT® can be applied to all types of materials.
Besides all kinds of metal, plastics such as PA or POM may be coated as well.
Is it possible to apply a type of coating that increases the coefficient of friction (traction)?
There are special GLISS-COAT® variants which are not formulated with friction-reducing, but with friction-enhancing pigments.
Is it possible to apply corrosion-resistant coatings on top of anti-friction coatings?
Depending on the requisite degree of corrosion protection, some of our GLISS-COAT® variants may also be applied as combined systems to meet this requirement as well.