| 摘要 |
PURPOSE:To improve weldability and workability and to provide the rust preventive structure advantageous in terms of cost by crimping a rust preventive sheet formed by sticking an adhesive to a metal of a specific thickness having the natural electrode potential lower than the natural electrode potential of the steel plate of a vehicle body between the joint surfaces of the mating part of the steel plates. CONSTITUTION:A roof reinforce 2 which reinforces a bent roof panel 1 forming a sun roof aperture 9 of, for example, the vehicle body, from an interior 10 side is spot welded to this roof panel in the above-mentioned aperture 9. The rust preventive sheet 3 is formed of metallic foil 4 of <=500mum thickness of the metal (Zn, Al, etc.) having the natural electrode potential lower than the natural electrode potential of the steel constituting the roof panel 1 and the reinforce 2 and the adhesive 5 (epoxy resin, etc.) of <=2mum thickness stuck to one surface of this metallic foil 4. This rust preventive sheet 3 is crimped to the spot weld zone between the front end of the roof panel 1 and the front end of the reinforce 2 and the spot welding is executed under prescribed conditions. The rust preventive structure having excellent rust preventive performance is imparted to the mating part of the steel plates of the vehicle body in this way. |
