Marine antiseptic composite coating and preparation method thereof

Abstract

The invention provides marine antiseptic composite coating. The marine antiseptic composite coating is prepared from the following components: a component A and a component B, wherein the component Ais prepared from, in parts by weight: 30-40% of epoxy resin, 1-5% of graphene, 1-5% of dispersing agent, 20-30% of distilled water, 10-20% of titanium dioxide, 3-10% of calcium carbonate, 0.2-0.5% ofdefoaming agent, 0.2-0.5% of leveling agent, 1-5% of organic bentonite, 0.25-3% of coupling agent and 0.3-2.0% of adhesion promoter; and the component B is prepared from 15-25% of water-based curing agent (H228B). Through the functionalization of nano titanium oxide, the bending strength and the tensile strength of epoxy are improved, the corrosion resistant property and impact resistant propertyof epoxy can be improved as well, the organic organisms on the surface of the coating can be subjected to oxygenolysis by means of the photocatalysis of epoxy, accordingly the biological corrosion damage brought by marine organisms can be reduced, the dispersity and the connectivity of graphene in the epoxy system are improved through adding of the self-made s waterbased dispersing agent, the corrosion resistance, the antifouling property and the impact resistant property of the coating are enhanced greatly.

Description

technical field [0001] The invention belongs to the field of steel anticorrosion engineering, and in particular relates to a method for preparing an anticorrosion material for marine pipelines. The antifouling and anticorrosion coating material can also be used in the fields of antifouling and anticorrosion for offshore oil platforms, antifouling and anticorrosion for ships, and antifouling and anticorrosion for underwater pipelines. Background technique [0002] With the development of the offshore oil and gas field industry, offshore mining, floating facilities (FPSO), and submarine pipelines continue to increase, and they are facing increasingly severe corrosion problems in the marine environment. Steel structures in marine environments are affected by multiple effects such as salt spray, wind, rain, and sunlight, and corrosive water films are easily formed on the surface. The process of atmospheric corrosion caused by the action of thin water film on steel is in line wit...

AI Technical Summary

Problems solved by technology

Adding a small amount of graphene in the coating can significantly improve the coating performance, but due to the large specific surface area and high surface energy of graphene, when the amount of graphene added reaches a certain level, it is easy to agglomerate in the epoxy coating. Cause cracks, stress concentration points and defects, resulting in a decrease in the anti-corrosion performance of the coating