| 摘要 |
PURPOSE:To keep a surface treating soln. at a uniform concn. and to carry out satisfactory surface treatment by continously supplying a replenisher to the surface treating soln., detecting the concn. of a component in the soln., and automatically increasing or decreasing the amount of the replenisher supplied. CONSTITUTION:A prescribed replenisher is continuously supplied to a surface treating soln., and the concn. of a component in the soln. is detected continuously or intermittently. When the detected value is above a set value, the supply of the replenisher is stopped. When the detected value is below the set value, the supply of the replenisher is started. Thus, the treating soln. is kept at a uniform concn., and satisfactory surface treatment is carried out. |
