我厂预应力钢丝生产过程中的表面处理采用中温磷化工艺，由于原设计采用蒸气直接加热，为防止泛起的沉渣影响磷化膜质量，蒸气管道是在上层清液位置水平放置。经过一段时间的生产，特别是在冬天，由于加热蒸气用量增加，冷凝水析出太多，稀释了溶液；为保证工作浓度，又必... The surface treatment of prestressed steel wire in our factory adopts medium-temperature phosphating process. Since the original design uses steam to heat directly, in order to prevent the falling sediment from affecting the quality of phosphating film, the steam pipe is placed at the level of supernatant. After a period of production, especially in winter, due to the increased amount of heated steam, condensed water is precipitated too much, dilute the solution; in order to ensure the working concentration, it must be ...