The effect of concentration of aqueous solutions of ethoxylated sorbitan esters on antiseizure properties

• Autorzy: Sułek W. , Wasilewski T.
• Konferencja: Second International Tribology Conference
• Języki publikacji: EN

Abstrakty

EN

Influence of compound's type and concentration of ethoxylated sorbitan ester (ESE) water solutions on their anti-seizure properties was investigated. Ethoxylated sorbitan monolaurate (ESML), ethoxylated sorbitan monostearate (ESMS) and ethoxylated sorbitan monooleate (ESMO) were used as lubricant additives. Tribological tests were performed on the four-ball machine, at linearly increasing load (409N/s) (tribosystem: steel-steel). Basing on the scuffing load (the load at the moment of rapid increment of friction torque) anti-seizure properties of the solutions were assessed. The other measured parameter was the seizure load, that is load at the moment when friction torque exceeded 10Nm. The limiting pressure of seizure was evaluated according to the formula: poz=0,52*Poz/d2 where Poz - seizure load, d - wear scar diameter. According to the results obtained one can say that addition of ESE to water significantly improves its anti-seizure properties. The measured tribological quantities strongly depend on concentration. 0.001%; 0.005%; 0.01%; 0.05%; 0.1%; 0.5% and 1% aqueous solutions were tested. The best anti-seizure properties were observed for ethoxylated sorbitan monostearate and monooleate. The results obtained can be interpreted as a consequence of a formed liquid crystalline structure near the surface. The presence of mesophases in water solutions of ethoxylated sorbitan esters was confirmed by observations in polarized light and characteristic changes of the viscosity.

Słowa kluczowe

EN

scuffing; seizure; ethoxylated sorbitan esters; lyotropic liquid crystals; lubricant additives

PL

wytrzymałość materiałów; smar; ciekły kryształ

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2002
• Tom: Vol. 7, Spec. is
• Strony: 189--195
• Opis fizyczny: Bibliogr. 20 poz., rys., wykr.

Twórcy

autor

Sułek W.

• Technical University of Radom, 26-600 Radom, ul. Chrobrego 27, POLAND

autor

Wasilewski T.

• Technical University of Radom, 26-600 Radom, ul. Chrobrego 27, POLAND

Bibliografia

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