Behaviors of copper in blackening bath without selenium were studied.
对铜在无硒电化学发黑液中的行为进行了研究。
The influence of ammonium molybdate, cobalt sulphate, ammonium bifluoride, acidity of blackening bath, blackening bath temperature and time on film quality were studied.
研究了钼酸铵、硫酸钴、氟化氢铵、黑化液酸度、黑化液温度及时间对膜质量的影响。
Bath formulas of blackening pretreatment and manganese series phosphating at mid-temperature were introduced.
介绍了预黑处理液配方和中温锰系磷化液配方。
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