A method of preparation of titanium dioxide used in Marine coatings

         The invention discloses a kind of ship coating preparation methods with titanium dioxide, includes the following steps: a, will get the titanium dioxide crude products by calcining metatitanic acid, and then to make TiO2 slurry, add sodium hexametaphosphate; B, add silicon compounds after heat, homogenization; C, adjust PH value of TiO2 slurry to 0.8 ~ 4; D, add organic dispersant after cured, add aluminum compounds, then homogenization; E, adjust PH value of TiO2 slurry to 4 ~ 8; F, cure TiO2 slurry; G, filter the TiO2 slurry, make the electrical resistivity of filter cake be equal or greater than 100 Ω m.; And then drying, heat treatment; H, add organic surface treatment agent to smash, that is. The invention has made nanometer silica sol and alumina sol, use physical adsorption and chemical adsorption on the surface of the TiO2 particles to form a dense coated layer, and then make the solid chemical deposition which on coated layer on the surface of the particles, the coated layer makes the finished products of this invention has good dispersion, weather resistance, corrosion resistance, at the same time, the invention also has the smooth process of reactants and easy to control.

                                                                         By Nicole