AFC (Sürtünme Azaltan Kaplamalar)


   


AFC, anti-friction coating is surface coatings which  prevent the friction and provide slipperiness. The objective is  to decrease  the negative and damaging effects of  dynamic force    coming to the surface by reducing the coefficient of the friction as possible at moving surfaces.In case, if the  speed at the working system, and  oil film occuring with oil viscosity and surface geometry are insufficient to lift the weight carrying on the system,  hydrodynamic lubrication conditions can not be ensured and surface contact inevitably becomes.

 

During these contacts on the surfaces;
Adhesion , abrasion , Fatigue (Repeating motion wear), Tribocorrosion (corrosion wear caused by vibration), pitting , and etc..   serious damages may occur.

Especially,
During the running-in period. (New machine parts are getting used to eachother.)
During the Cold start-up (Running stopped machine system again  after a certain period  at the end of the working, )
During Vibratory work (high-frequency operation).
Staying  the position without oil, because of the  high temperature and oil leakage

 

Reducing the coefficient  friction and prevents the damages are not possible,  by separating the oil film and surfaces from each other  effectively at very high load, low or medium speed working systems.
In this case, AFC (dry / slick Film Lubrication Coating) technology  make excellent results at mentioned  systems.In such cases, hardening the surfaces is not a solution certainly, because it does  not  prevent the material loss and  not decrease the friction and accordingly energy losses.

Based on  the "Dry Film Lubrication"  principle , AFC industrial coating applications  form that  the coefficient of friction is  very low on the surfaces, and very thin film layers which load resistances are excellent.Protecting  the item surfaces such as abrasion, bad effects of heat, corrosion, aggressive chemicals, radiation,  it presents the  desired conditions for a long time without a problem to  work the system. During the mutual movement, active solid lubricant materials prevent  the surface contact  and minimize the friction loss , thus there is no material loss from  the mutual surfaces. This situation is mentioned clearly below given figure.






Opening  a new page about the covering, increasing the production standarts in every field of the industry,  and compared with the conventional coating methods, very high performance, very fast production and providing  full accordance to the environmental standarts, Technocoat AFC (Anti Friction Coating)  within Endüstri Teknik  Ltd.Şti,  attracts in a positive direction of the efficiency of the producers and users.

Applied to any material, not causing to any problems,  which are seen at classical coating methods, such as "fragility of hydrogen" or "uncontrolled corrosion" , providing the effective and decorative surfaces coatings, are used successfully at every fields of service and production , such as service and maintenance aimed applications , original item and equipment production, and  automotive, air-space, special machine and defence industry.

Some of the machinery equipments  are below listed :

They  use the AFC Coating to obtain the increase of efficiency.
  1. -         In gears: Gears may be faced with  very big and variable loadings because of their structure.
    Many conventional type of liquid or grease  lubricant can not prevent damages  on the gear on their own.The properties can reach to the serious problems under variable loadings and  at running-in periods.AFC reduces the abrasion problems providing the slickness and protection on the gear surfaces.Especially, it is the most effective solution for the various abrasions.
  2. -         Pins and bushings: Damages  can be occured often at these types of elements  , because of the insufficient lubrication. Generally, selecting more soft  one of the pins or bushings is wasted.  But AFC coating prevents the negative effects of the high load and excessive abrasion  at both pin and bushing sides separately.Thus, both equipments are protected.
  3. -         Chain elements: Chain oils working at the dusty and dirty  lose the lubrication properties at a high proportion .AFC coatings prevent these kind of problems, because of their  dry lubrication properties.
  4. -         Pistons and bearings: On the item surfaces, excessive wears occuring during the running-in time and cold start-ups are prevented. Energy saving is achieved. Quiet and longevous work is obtained.
  5. -         Valve, valve plugs, cam shafts: Coating provides safe and longevous work at the organs which their friction and wear are critical and permanent.It reduces the coefficient of friction, thus provides efficiency increase.
  6. -         Fasteners: Bolts and stud-bolts are easily installed to the machinery equipments, and demounting is made without any problems at the maintenance time.In most cases, to gain necessary the pre-tension to the system, with a turning effect giving to the bolt and occuring on the gears such as cold welding or breaking of the bolt head cases are protected by optimising the coefficient of friction.Similarly, during the working, welding to the system of the bolt with the excessive heat or corrosion effect are protected with the special additives inside the coatings.
  7. -         Springs: During the working, coil and disc springs has a friction with each other or with external environment.Generally, this situation is ignored.But if this situation is not prevented, damages such as cracking or snap can occur.AFC Coating becomes useful at the low-frequency vibration and high-load applications.
  8. -         Sliding elements: Sliding lamas on each-other, centering pins or lock-type crossbars can be started to work spaced and tensioned within long-term due to the wears.This is a diffucult case to control without loss accurately, but it is not impossible. Desired efficiency can be achieved exceedingly with the usage of AFC.
  9. -         AFC Coating are used for air, military or aerospace vehicles at very high or low temperatures, attracted from the UV radiation and vacuum effect. to increase the safety values and to provide the service-life without problem.
  10. -         AFC Coatings are seen at the production specification of several parts or equipments which are used at the air, military or aerospace industries.