New Approach for Accurate Determination of Influence of Humidity on Static Friction between Polymer-Steel Tribocontacts

Tribological behavior of materials is strongly influenced by their surface characteristics which include roughness, chemical potential, visco-elastic properties, presence of adsorbed layers, etc. For water-absorbing materials, such as polymers, humidity strongly alters the tribological properties. In order to understand as to how these characteristics affect the tribological behavior of contacts, one requires an appropriate test and analysis methodology. Defined temperature and humidity conditions are needed to characterize tribological systems containing these types of materials. In the current report, we present a unique combination of high precision tribological testing methodology which enables the users to investigate the influence of humidity on the static friction between steel polymer contacts at model scale. This methodology can of course be extended to other relevant systems as well.

Introduction

Tribological behavior of materials is strongly influenced by their surface characteristics which include roughness, chemical potential, visco-elastic properties, presence of adsorbed layers, etc. For water-absorbing materials, such as polymers, humidity strongly alters the tribological properties. In order to understand as to how these characteristics affect the tribological behavior of contacts, one requires an appropriate test and analysis methodology. Defined temperature and humidity conditions are needed to characterize tribological systems containing these types of materials.

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