The optimum concentration of Changcheng 3# or Lan-826 was 0.3%, acid pickling temperature was 60? and its holding time was less than 5 hours.
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美
- 长城3%23或兰-826的最佳添加量为0.;3%25,最佳酸洗温度为60℃,酸洗时间小于5h。