Evaluation of the anticorrosive behavior of epoxy-Nb2O5 paint in high temperatures submitted to the environment with sulfuric acid
| Autor: | Maria Eduarda Dias Serenario, Bernardo Augusto Farah Santos, Alysson Helton Santos Bueno, Luiz Roberto Martins de Miranda |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Carbon steel Scanning electron microscope 02 engineering and technology engineering.material 010402 general chemistry Electrochemistry 01 natural sciences Corrosion chemistry.chemical_compound Colloid and Surface Chemistry Composite material Sulfuric acid Surfaces and Interfaces General Chemistry Epoxy 021001 nanoscience & nanotechnology 0104 chemical sciences Surfaces Coatings and Films Dielectric spectroscopy chemistry visual_art engineering visual_art.visual_art_medium Degradation (geology) 0210 nano-technology |
| Zdroj: | Journal of Coatings Technology and Research. 17:1331-1342 |
| ISSN: | 1935-3804 1547-0091 |
| Popis: | The aim of the present work is to evaluate the corrosion resistance of epoxy-Nb2O5 paint in acid atmosphere and high temperatures. For comparison, samples of SAE1020 carbon steel were coated with an epoxy-Nb2O5 paint and an epoxy commercial paint. The samples were partially immersed for 720 h and 1440 h in 40% (v/v) H2SO4 solution at temperatures of 25°C, 60°C, and 80°C. The degradation analysis, mechanical characterization, and electrochemical measurements of the samples were carried out after immersion period. The coatings were characterized by scanning electron microscopy. Electrochemical impedance spectroscopy was used to evaluate the electrochemical behavior. Results showed the epoxy-Nb2O5 paint was less blistering, cracked, flaked, and rusted than the commercial epoxy paint samples. However, it was important to note that the increase in temperature led to the degradation of epoxy-Nb2O5 paint. The addition of temperature was probably responsible for the degradation of epoxy resin over the immersion time. |
| Databáze: | OpenAIRE |
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