Patent ID: 11319641

Abstract:
The amount of wash water to be consumed in an electrodeposition coating facility and the amount of used wash water to be discharged that requires post-treatment are reduced. To achieve this object, an electrodeposition coating facility that includes a degreasing process section A, a post-degreasing rinse section B, a chemical conversion process section C, a post-chemical-conversion rinse section D, an electrodeposition coating section E, and a post-electrodeposition rinse section F is provided with a filtration process apparatus 4 and a wash water recycling line 5. The filtration process apparatus 4 performs a filtration process on wash water W after being used to wash an object to be coated 1 in the post-electrodeposition rinse section F. The wash water recycling line 5 feeds, to the post-chemical-conversion rinse section D, the wash water W after being subjected to the filtration process in the filtration process apparatus 4 as wash water W to be used to wash an object to be coated in the post-chemical-conversion rinse section D.