Studies of the Influence of Temperature and the Energy State of the Surface Layer of Adsorbents on Wall Effects in Soap-Based Greases |
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| Authors: | Maciej Paszkowski Roman Wróblewski Aleksandra Walaszczyk |
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| Affiliation: | 1.Department of Fundamentals of Machine Design and Tribology,Wroclaw University of Science and Technology,Wroc?aw,Poland;2.Department of Founding, Automation and Plastics,Wroclaw University of Science and Technology,Wroc?aw,Poland |
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| Abstract: | This paper presents the results of studies of wall effects in commercial soap-based greases LT4-S2 and HUTPLEX EP-2, thickened with, respectively, lithium 12-hydroxystearate and overbased calcium sulfonate. The studies were conducted in the presence of five different materials: copper alloy C11000, bronze B476, EPDM rubber and PTFE and PU thermoplastics. The influence of the energy state of the surface layer of the adsorbents and temperature (ranging from ?20 to 60 °C) on the intensity of wall effects was investigated. Changes in the structural viscosity and shear stress in the boundary layer area in the greases and the soap-based thickener’s ability to adsorb on the surfaces of the adsorbents were determined by evaluating the rheological parameter plateau modulus. |
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