The Application of Chitosan as a Modifier for Lubricating Greases Based on Vegetable Oil
Journal Title: Tribology in Industry - Year 2019, Vol 41, Issue 2
Abstract
The paper focuses on the influence of novel chemical additive on the physicochemical and rheological properties of novel lubricating grease compositions. The mentioned physicochemical tests revealed that the additive influenced positively the dropping point and oxidation stability of the tested lubricating greases as well as on the reduction of oil release from the grease. The introduction of chitosan caused also an increase of dynamic viscosity at lower shear rates and significant changes of viscosity in the low temperatures. The introduction of modifier led to the increase of yield point value of the tested lubricating compositions. Spectral analyses of lubricating compositions after tribological tests showed that during mechanical and thermal excesses, some components of the lubricant undergo chemical reactions with the surface of the friction pair, creating compounds effectively protecting the tribosystem from damage.
Authors and Affiliations
R. Kozdrach, J. Skowronski
Keywords
Related Articles
- EP ID EP593790
- DOI 10.24874/ti.2019.41.02.07
- Views 66
- Downloads 0
Wear Characterization of Aluminium/Basalt Fiber Reinforced Metal Matrix Composites - A Novel Material
Aluminum alloy based metal matrix composite participate have a wider applications in wear resistance applications. Attempt made in current study is that, basalt fiber reinforced aluminum metal matrix composite have been...
The Control of the Lubricant Film by the Resistive Method for Scuffing
The existence of a continuous film of lubricant increases the electrical resistance of the contact that can provide information on the quality of contact’s lubrication. This paper presents some experimental results obtai...
Disk on Disk Test of Gear Pair Power Losses
This paper presents the research of friction in gear pairs by using tribometer that provides diskon-disk contact. When gear teeth mesh, there is a combination of sliding friction and rolling friction, and in that, the va...
Friction and Wear of Cr-O-N Coatings Characterized by Atomic Force Microscopy
Cr-O-N coatings with different oxygen concentration were deposited using vacuum arc plasma fluxes on steel substrates. The coatings were investigated using atomic force microscopy under ambient temperature and humidity c...
The Influence of the Contact Pressure on the Value of the Coefficient of Friction
Experimental research was carried out on the tribometer of high reliability of measurement. The paper discusses the impact of normal contact pressure on the value of the coefficient of friction. Elements that are in cont...