| abstract |
(57) [Problem] To provide high throwing power even by a three-coat one-bake coating method using a water-based paint, and to have a film appearance such as a finished appearance and corrosion resistance equivalent to a conventional three-coat three-bake coating method. To provide a method for forming a multilayer coating film capable of providing a three-coat film. SOLUTION: The wet cationic electrodeposition coating film is wet and wet. In a method of forming a laminated coating film, forming an uncured aqueous intermediate coating film, an aqueous base coating film and a clear coating film on-wet, and then simultaneously heating and curing these, As the cationic electrodeposition paint, the volatile organic content (VO C) and a method of using a lead-free cationic electrodeposition coating material having a low metal ion concentration and using, as an intermediate coating material, a film-forming resin solution which is dispersed in water with a nonionic dispersant and / or a cationic dispersant. |