Journal of Friction and Wear

, Volume 37, Issue 2, pp 187–190 | Cite as

The influence of the valena metal-plating additive on tribotechnical characteristics of the Steel–Bronze tribological system

  • M. Kandeva
  • D. Karastoyanov
  • E. Assenova
  • K. Jakimovska
  • S. Simeonov
  • A. Vencl


The paper considers a change in the coefficient of friction and the temperature distribution in the contact zone of the steel–bronze tribosystem. Investigations were carried out by the shaft–bushing system for three values of the load in the mixed-to-boundary lubrication regime with SAE 80W transmission oil without and with Valena additive. It is found that the additive presence in oil decreases the coefficient of friction by 11–21%, depending on the applied load. At the same time, the maximum decrease in the coefficient of friction is observed at a maximum applied load of 1500 N.


coefficient of friction contact temperature lubricant Valena additive 


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Copyright information

© Allerton Press, Inc. 2016

Authors and Affiliations

  • M. Kandeva
    • 1
  • D. Karastoyanov
    • 2
  • E. Assenova
    • 3
  • K. Jakimovska
    • 2
    • 4
  • S. Simeonov
    • 5
  • A. Vencl
    • 2
    • 6
  1. 1.Faculty of Industrial TechnologyTechnical University of SofiaSofiaBulgaria
  2. 2.Institute of Information and Communication TechnologiesBulgarian Academy of SciencesSofiaBulgaria
  3. 3.Society of Bulgarian Tribologists, Tribology CentreTechnical University of SofiaSofiaBulgaria
  4. 4.Ss. Cyril and Methodius UniversityFaculty of Mechanical Engineering in SkopjeSkopjeRepublic of Macedonia
  5. 5.Faculty of Mechanical EngineeringBrno University of TechnologyBrnoCzech Republic
  6. 6.University of BelgradeFaculty of Mechanical EngineeringBelgradeSerbia

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