Protective Properties of Thermal-Insulation Coatings under Conditions of Long-Term Exposure to Natural Climatic Factors

Zhanar O. Zhumadilova, Ruslan E. Nurlybayev, Yelzhan S. Orynbekov, Aidos A. Joldassov, Malik N. Abdikarimov

2022

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DOI 10.3390/coatings12121925
Data confidence 85 high
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Abstract

The purpose of this study was to analyze the stability of the protective properties of thermal-insulation coatings under long-term exposure to natural climatic factors. An analysis of the changes in the decorative characteristics was carried out using a CD-6834 spectro-guide sphere gloss spectrophotometer; for the mechanical tensile testing of the polymer composites, an AGS-X series tensile testing machine, TRAPEZIUM X software, and a PSO MG4 device were used to determine the adhesion strength of facing and protective coatings. The results showed that in most cases, only full-scale climatic tests to determine the qualitative indicators of epoxy coatings (ECs), such as indicators of the viability and exothermicity of epoxy compositions, changes in the viscosity of epoxy binders, and the tensile strength and thermal conductivity, allowed us to evaluate the effects of changing the epoxy coating properties in full-scale conditions. When analyzing changes in the characteristics of the polymer samples after exposure to climatic factors, it was found that the compositions based on epoxy resin ED-20, modified epoxy resin Etal-247, active thinner Etal-1, and hardener Etal-45M demonstrated the best elastic and strength characteristics.