| The marine environment as a complex and demanding natural balance system,places higher demands on the protectiveness and wear and corrosion resistance of the metal surfaces of offshore equipment.The most important marine issues facing people today are corrosion,wear and corrosion-wear interaction.Acrylic silicone coatings are widely used as protective coating materials for protection against marine corrosion and abrasion because of their excellent corrosion resistance and protection properties.However,the use of acrylic silicone coatings in the field of corrosion and wear resistance still suffers from problems such as poor adhesion and durability.For this reason,functional nanomaterials are introduced into acrylic silicone resins to improve the corrosion and wear resistance of the coatings,however,nanoparticles form agglomerates due to the presence of Van der Waals forces,and by modifying the functional nanoparticles with hybridization,a composite acrylic by modifying the functional nanoparticles with hybridization,a composite acrylic-silicone coating with both anti-corrosion and wear resistance can be constructed.The main research contents and conclusions of this topic are as follows:（1）Preparation and characterization of SiO2-MWCNTs reinforced phase materials.SiO2-MWCNTs were generated by sol-gel method,and their molecular structure and chemical composition were explored by means of scanning electron microscopy,X-ray diffraction and fourier infrared spectroscopy.The microstructure and morphology of MWCNTs and SiO2-MWCNTs composites were observed,and the binding quality of SiO2-MWCNTs was evaluated.Based on this,the adding ratio of MWCNTs and SiO2-MWCNTs to the acrylic silicone composite coating was determined.（2）Study on the surface morphology and mechanical properties of the reinforced phase material on the silicone composite coating.The surface mechanical properties of the composite coatings were studied by means of scanning electron microscope,contact angle measuring instrument,adhesion tester,Vickers hardness tester and other test equipment by adding different mass fractions of MWCNTs and SiO2-MWCNTs in acrylic silicone resin.The effects of the type and content of reinforcing phase on the adhesion,hardness,impact resistance and surface hydrophobicity of the composite coating were investigated,and the optimal addition ratio of MWCNTs and SiO2-MWCNTs to improve the mechanical properties of acrylic resin coating was obtained.（3）Study on the wear resistance and corrosion resistance of the nano-reinforced phase material on the silicone composite coating and the strengthening mechanism.Based on the self-release antifouling principle,the effect mechanism of adding different mass fractions of MWCNTs and SiO2-MWCNTs on the performance of the silicone composite coating was explored to enhance the wear resistance and corrosion resistance of the nano-silicone composite coating.To simulate the marine environment,the friction and wear experiments were conducted to test the friction and wear properties.The influence rule of the proportion of reinforcing phase on the friction coefficient of coating was analyzed,and the mechanism of enhancing the wear resistance of coating by the addition of nano-reinforcing phase was explored.The coating samples were immersed in 3.5%Na Cl solution,and electrochemical tests were carried out on the coating samples soaked for different time,so as to study the electrochemical corrosion performance of the composite coating and reveal the mechanism of improving the corrosion protection performance of the composite coating. |
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