| abstract |
(57) [Problem] A laminated coating film capable of providing a three-coat film equivalent to a conventional three-coat three-bake coating method in terms of a coating performance such as a finished appearance and corrosion resistance even by a three-coat one-bake coating method. To provide a forming method. SOLUTION: The wet cationic electrodeposition coating film is wet and wet. In a method of forming an uncured intermediate coating film, base coating film, and clear coating film on-wet, and then simultaneously heating and curing these, a laminated organic coating film is formed. Using a lead-free cationic electrodeposition coating material having a low content (VOC) and a low metal ion concentration, as an intermediate coating material, a solid content ratio based on the total resin solid content, It comprises 10 to 70% by weight of a hydroxyl group-containing resin (a), 10 to 70% by weight of a curing agent (b) capable of reacting with a hydroxyl group, and 18 to 50% by weight of a nonaqueous dispersion resin (c) ((a)). + (B) + (c) = 100%), and a method of forming a laminated coating film using a pigment-containing material. |