NOVELTY - A hydrogenerator shell anticorrosive and anti-dew formation structure has inner and outer surfaces coated with heat-insulating and anticorrosion layer. The outer surface is coated with epoxy primer having thickness of 50-150 mu m, and epoxy asphalt anti-rust paint having thickness of 160-260 mu m. The inner surface is coated with epoxy primer having thickness of 50-150 mu m, thermal insulation paint having thickness of 1.0-3.0 mm and white paint having thickness of 25-45 mu m.    USE - A hydrogenerator shell anticorrosive and anti-dew formation structure.    ADVANTAGE - After processing, the shell not only has corrosion-proof function, but also has heat insulation function, which can effectively prevent dews on the surface of shell and corrosion of the parts in the shell to guarantee the normal operation of the machine and prolong the service life of the whole machine.    DETAILED DESCRIPTION - A hydrogenerator shell anticorrosive and anti-dew formation structure has inner and outer surfaces coated with heat-insulating and anticorrosion layer. The outer surface is coated with epoxy primer having thickness of 50-150 mu m, and epoxy asphalt anti-rust paint having thickness of 160-260 mu m. The inner surface is coated with epoxy primer having thickness of 50-150 mu m, thermal insulation paint having thickness of 1.0-3.0 mm and white paint having thickness of 25-45 mu m. The epoxy primer comprises an epoxy zinc-rich primer or dual component zinc-enriched epoxy iron red primer or epoxy mica iron intermediate paint. The epoxy asphalt anti-rust paint comprises epoxy asphalt anti-rust paint or thick slurry epoxy resin paint or solvent-free epoxy asphalt anti-rust paint. The heat-insulating coating comprises epoxy resin insulating paint or alkyd resin insulating paint. The white paint comprises rubber magnetic paint or alcohol acid magnetic paint. An INDEPENDENT CLAIM is included for preparing the anticorrosive structure comprising (A) inner and outer surface derusting, where rusting level and rust removing level is in accordance with Sa2.5 rust standard (GB8923-1988), (B) coating outer surface with 1-3 epoxy zinc-rich primer or dual-component zinc-enriched epoxy iron-red primer or epoxy mica iron intermediate paint, with thickness of 50-150 mu m, (C) coating outer surface with 3-5 epoxy asphalt anti-rust paint or thick slurry epoxy resin paint or solvent-free epoxy asphalt anti-rust paint, with thickness of 160-260 mu m, (D) coating epoxy resin insulating paint or alkyd resin insulating coating, with thickness of 1.0-3.0 mu m, (E) coating white chlorinated rubber magnetic paint or alcohol acid magnetic paint with thickness of 25-45 mu m.    DESCRIPTION OF DRAWING(S) - The drawing is a sectional view illustrating the hydrogenerator shell anticorrosive and anti-dew formation structure.