The electrocoating to inhibit induced corrosion can deposit a coat not only to the exterior surface but also on the inside of whole metallic components of BIW. But it is difficult to deposit paint films on the inside area because metallic components are laid in many layers. It may cause short of paint films thickness. Currently the verification of correct paint film thickness requires the use of tear-down prototypes. When paint films thickness is inadequate, a structural modification on each metallic components is needed. To verify the thickness improvement for a structural modification requires a huge man hour and leads to increasing development time. In recent years, the simulation technology have been developed to predict the paint films thickness in e-coating field. By applying the simulation to BIW, improvement in paint thickness quality and shortening of development period are expected.
