| abstract |
A coating film capable of attaining excellent corrosion resistance which is provided with both the first coat formed on a member having a metal surface by heating the first coating composition which comprises, based on the whole composition, 5 to 40% by mass of an organosilicon compound, 0.05 to 5.0% by mass of an organotitanate compound, 20 to 60% by mass of one or more metal powders selected from the group consisting of zinc powder, zinc alloy powders and aluminum powder, and 10 to 60% by mass of an organic solvent in such a way to cover the surface including the metal surface and the second coat formed on the first coat by heating the second coating composition which is an aqueous one comprising, based on the whole composition, 5 to 16% by mass of a silane coupling agent and 30 to 60% by mass of an alkali silicate. |