Browse Publications Technical Papers 2019-01-0188
2019-04-02

State of The Art E-coating with high precision physics involved 2019-01-0188

Increase the prediction quality of thickness in micron deposition during e-coating. In this process there exist many influences, which change the deposition behaviour. Some of them having a higher impact on the results and some others a smaller one. A brief description of the process reads like: The total voltage on all anodes are defining the total electric potential which get distributed on the car body. The variable electric resistance of the car body materials defines the electric field on the car body. Diffusion bring paint particles of the fluid onto the car bodies surface. The electrolyses is finally depositing the paint particles to the surface. The electric resistance is changing and the electric field changes. This leads to the so called “wrap-around” effect allowing electricity passing faraday effects successfully. Low voltage leads into cavities and deposition is starting there too. In this session we will discuss some key influences needed to be considered and ongoing research with ESS to increase the prediction quality of the deposition simulation. The paper will discuss an easy way to obtain fast in sense of computational time needed a high accurate electric field everywhere on the car body. Further, the paint experiment needed to derive an electric resistance model for car body materials will be discussed. What is the influence of paint velocity (too slow or too fast) and thickness deposition. Why is it not sufficient to calibrate results and it is unavoidable to consider fluid flow for deposition?

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