Protective polymer coating with increased strength and adhesion characteristics
Abstract
Protective polymer coating with increased strength and adhesion characteristics
Incoming article date: 02.04.2023The paper presents the results of studies of the characteristics of a polymer coating for the protection of steel and concrete surfaces based on low molecular weight dimethylsiloxane rubber SKTN-A. For cold curing of the binder and its modification, the MSN-7-80 hardener was used, an additional functional additive was galvanic sludge calcined at 1000 °C and crushed to a particle size of no more than 40 microns. It was found that polymethylsilazane, which is part of MSN-7-80, increases the strength characteristics of the coating, especially its cohesive strength, while reducing water absorption by increasing the hydrophobicity of the surface. In turn, galvanic sludge increases the mechanical strength upon impact. The ecological safety of the obtained material was confirmed by the method of biotesting on the mortality of Daphnia magna Straus. As a result of comparison with a protective coating similar in composition and purpose, it was revealed that the coating obtained in this work surpasses it in strength and adhesion characteristics. The developed polymer composition can be used to protect steel and concrete surfaces in construction and mechanical engineering from shock and moisture, including in extreme conditions of high or low temperatures and in contact with aggressive media.
Keywords: polymer composition, protective coating, organosilicon binder, electroplating sludge, polymethylsilazane, cold curing