PH value test paper is an important tool in the electroplating industry

PH value

When the PH value of the bath is low, the coating is bright but hydrogen precipitates out, the current efficiency is reduced, and the covering ability is decreased. High PH value, coating rough black, local gray black. Usually the PH value will rise slowly in the process of electroplating, then pay attention to adjust the PH value with dilute hydrochloric acid in time. Adjust the PH value to constantly stir, to prevent the local acidity is too high and cause the additive precipitation. General bath PH value should be controlled in the range of 4.5-5.4, with 4.8 as the best.