Investigation of the Physical Properties of Fluids for Removing Industrial Contaminants

Abstract The aim of this study was to investigate the influence of concentration and temperature on the physical properties of selected industrial cleaning fluids, focusing on parameters relevant to the cleaning process, such as viscosity, shear stress, density, activation energy, and wettability. Four cleaning agents from the company Noyen were examined, including both concentrated products and their 10% aqueous solutions. The rheological properties of the fluids were evaluated using a rotational viscometer; density was measured with a pycnometer; surface tension and wettability were assessed using a goniometer; and activation energy was determined based on the Arrhenius equation. The results of the viscosity and shear stress tests indicated that all tested fluids exhibited Newtonian behaviour in both concentrated and diluted forms. Surface tension and wettability analysis showed good wetting properties for all tested fluids (contact angle <55°), although significant differences in wettability were observed depending on the type of surface and the specific fluid used.