Textured epoxy resin coatings for corrosion resistance
A new study describes the preparation of textured epoxy resin coatings for excellent hydrophobicity and corrosion resistance in marine environments.
Because of the severe corrosion of marine structural steel under the splash zone, researchers propose to prepare surface textures in widely used epoxy resin (ER) coatings to improve the hydrophobicity and corrosion resistance. However, according to scientists, the surface texture preparation technology of organic coatings is flawed and needs to be improved. Template method, one of the textured preparation technologies of organic coatings, has the trouble that the air bubbles, which diminish the coating quality. In a new paper, the method of curing at room temperature and vacuum treatment is used to reduce the generation of air bubbles.
Improved corrosion resistance
The hydrophobic properties of the textured ER coatings were systematically investigated, the contact angles of the textured ER coatings were significantly improved, and all the textured ER coatings samples met the hydrophobic criteria. Furthermore, the electrochemical impedance spectroscopy (EIS) analysis of the textured ER coatings showed that the corrosion resistance was improved by two orders of magnitude compared to the smooth ER coatings. The effect of the texture parameters on the corrosion resistance and hydrophobic properties of the textured ER coatings showed a high degree of consistency.
The study has been published in Progress in Organic Coatings, Volume 175, February 2023.
