PURPOSE: To maintain the surface quality of a polished product by spraying water to the surface of the large-sized Al product in the process of pulling up the product from an electrolytic polishing bath and transporting away the excess moisture thereof.
CONSTITUTION: Ordinary warm water or cooling water is sprayed in the form of mists over the entire surface of the polished product (a) from nozzle arrays 15, 15... for water spraying installed on ducts 14 for lateral-pulling and-discharging on the right and left of a polishing chamber 1 right after the polished product (a) is pulled up from a polishing bath 2 by a crane device 4. The polishing liquid is flushed away, by which the surface of the polished product (a) is maintained in a wet state. As a result, the polished product is cooled while the deterioration of brightness by drying of the product surface and the formation of a white dotty state are prevented. Further, the excess moisture and mist are transported and removed to the outside by the ascending air flow having the strong suction of about 10 to 30m wind-speed by the discharge port 10, 10 and the fan 11, 11 for discharging installed at the carrier box 5 and the horizontal air flow of the strong suction and discharge from the ducts 14, 14 for lateral- pulling and-discharging.