Critical evaluation of a cold phosphating bath
Critical evaluation of a cold phosphating bath
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冷磷化槽的严格评价
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
M. Subbaiyan
中科院分区：
文献类型：
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作者：
T. N. Narayanan;M. Subbaiyan
通常用于在线监测磷化槽的控制参数的有效性已得到充分证实。针对配制的冷锌磷化浴研究了它们评估冷磷化浴的适用性。通过确定连续操作期间的控制参数值并通过研究三组连续操作磷化过程中开路电位随时间的变化来进行评估。该研究揭示了控制参数在量化金属/溶液界面处产生的磷酸量方面的无效性，以及使用电位-时间测量来成功表征界面处酸度的关键变化
The usefulness of control parameters normally practiced in on-line monitoring of phosphating baths is well established. Their applicability to evaluate cold phosphating baths was studied with respect to a formulated cold zinc phosphating bath. The evaluation was made by determining the control parameter values during continuous operation and by studying the changes in the open circuit potential with time during phosphating for three sets of successive operations. The study reveals the ineffectiveness of the control parameters in quantifying the amount of phosphoric acid generated at the metal/solution interface and the use of potential-time measurements in successfully characterizing the critical changes in acidity at the interface