When amino silicone resin is combined with phenolic epoxy resin for ship anticorrosive coating, epoxy resin has excellent chemical resistance and can operate for a long time in different environments without corrosion. This is particularly important for marine environments, where seawater contains a large amount of salt and other corrosive substances.
Epoxy groups are attached to the main chain of epoxy resin, which makes it water-resistant and able to absorb mechanical and thermal stresses. In marine environments, coatings need to be able to resist the penetration of water molecules to prevent corrosion caused by moisture. Moreover, the high adhesion of epoxy resin to the substrate makes it very suitable for ship coatings, ensuring that the coating is not easy to fall off. Especially in an environment where dry and wet alternate, good adhesion can reduce the damage to the coating caused by environmental changes.
Epoxy resin can withstand high temperatures of more than 200°C without brittleness or melting. Although the temperature in the marine environment is usually not so high, the heat resistance can ensure the performance stability of the coating under extreme conditions. Epoxy resin-based composite materials have good plasticity, flexibility and wear resistance, which are easy to process and form. This is an important feature for ship coatings because they need to be able to withstand the continuous friction between the hull and the water.
Studies on the failure process of epoxy resin coatings under simulated seawater wet-dry alternation conditions show that epoxy anti-corrosion coatings fail quickly in wet-dry alternation environments, especially after the coating undergoes the alternating process of water absorption and swelling and water loss and shrinkage, the internal pores of the coating increase and increase, the surface cracks, and the coating completely fails. Therefore, for ship anti-corrosion coatings, special attention should be paid to the stability and durability of the coating under wet-dry alternation conditions. Finally, epoxy resin has good biodegradability and can be decomposed into carbon dioxide and water within a certain period of time, which is harmless to the environment. This is of great significance for reducing marine environmental pollution.
Ship anti-corrosion coatings combined with amino silicone resin and phenolic epoxy resin show good adaptability in the marine environment, especially in terms of chemical corrosion resistance, water resistance, adhesion and heat resistance. However, attention should also be paid to the stability of the coating under wet-dry alternation conditions to ensure long-term anti-corrosion effect.