摘要：【中文】本发明具体涉及一种改性纳米二氧化硅及其改性方法、防腐涂料和涂层，属于防腐涂料技术领域，本发明提供的一种改性纳米二氧化硅的方法，包括：将纳米二氧化硅与水混合，进行一次反应，获得一次反应物；取六甲基二硅氮烷和六甲基二硅氧烷，与无水溶剂混合，获得混合溶液；将所述第一反应物与所述混合溶液混合，进行二次反应，获得改性纳米二氧化硅；采用本发明实施例提供的改性纳米二氧化硅的方法制得的改性纳米二氧化硅，其具有优异的分散性及疏水性，可在多种有机溶剂中分散性良好，喷涂至碳钢表面后，涂层表面平整，提高陶瓷表面的耐腐蚀性。 【EN】The invention specifically relates to modified nano-silica and a modification method thereof, an anticorrosive coating and a coating, belonging to the technical field of anticorrosive coatings, and the invention provides a method for modifying nano-silica, which comprises the following steps: mixing nano silicon dioxide with water, and carrying out primary reaction to obtain a primary reactant; mixing hexamethyldisilazane and hexamethyldisiloxane with an anhydrous solvent to obtain a mixed solution; mixing the first reactant with the mixed solution, and carrying out secondary reaction to obtain modified nano silicon dioxide; the modified nano-silica prepared by the method for modifying nano-silica provided by the embodiment of the invention has excellent dispersibility and hydrophobicity, can be well dispersed in various organic solvents, and can be sprayed on the surface of carbon steel, so that the surface of a coating is flat, and the corrosion resistance of the surface of ceramic is improved.