| The work was supported the China Natinonal Key Technologies R&D Programme ,the objection of this research is the possibility of the anti-corrosion nano-film on carbon steel made by Self-Assembly technology.SAMs ( Self-Assembled monolayers ) nano-structured SiO2 thin films were fabricated for the first time onto the substrate of carbon steel through Molecular Self-Assembly method by dipping into the mixture solution of silicones and gasoline and heat-treating consecutively. The performances of this SAMs in the corrosion and defend fields are studied and explored. A new highly ordered Molecular Self-Assembly systems of silicones on carbon steel was designed and prepared successfully.The influences of processes and factors of the preparation on the thin films were investigated for the Self-Assembly method. The temperature of the dipping and the time of the dipping do not have much influence on the film. The speed of draw-up, the time of air dry and the concentration of the thinner have greatly effect on the film. The film was prepared has excellent protect effect when the temperature of heat treatment is 350℃, and the speed of temperature ascending is 1℃/min. XPS and EDS were proved that the composition of the film was made of by Si, O, C elements. The proportion of Si and O is 1:2.The angular-dependent XPS showed the interspace distribution of different element is relatively uniformity. The mode of the chemistry combination of Si is SiO2. AFM and SEM showed that the film was constituted by contacted particles. The diameters of the particles were 20nm. The anticathode of polarization curve of carbon steel with SAMs by changed- electrical voltage method suggested that carbon steel is passivation state in the rust medium. The result of dipping experiment explained that the nano-structured SiO2 film made by SA method had excellent protection to the substrate for carbon steel.
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