The antecedents of excessive chloride ion consumption in electroplating of electric heating tubes

The antecedents of excessive chloride ion consumption in electroplating of electric heating tubes

During copper plating, the low current area of the circuit board surface exhibits a "matte" phenomenon, with a low concentration of chloride ions; Generally, by adding hydrochloric acid, the "matte" phenomenon of the plating layer in the low current density area of the board surface can disappear, and the concentration of chloride ions in the plating solution can reach the normal range, resulting in a bright plating layer on the board surface. If a large amount of hydrochloric acid is added to solve the problem of "dull" coating in low current density areas, it may not necessarily be caused by low chloride ion concentration, and the true reason needs to be analyzed. If a large amount of hydrochloric acid is added, it may have other consequences and increase production costs, which is not conducive to enterprise competition.

Correct Analysis of the Reason for "Low Current Density Zone Coating Matte"

By adding a large amount of hydrochloric acid to eliminate the phenomenon of "low current density area coating not bright", it indicates that if there are too few chloride ions, hydrochloric acid needs to be added to increase the concentration of chloride ions to reach the normal range, making the low current density area coating bright. If multiple doses of hydrochloric acid need to be added to achieve the normal concentration range of chloride ions? What is consuming a large amount of chloride ions? A high concentration of chloride ions can lead to rapid consumption of brighteners. It indicates that chloride ions will react with brighteners, and excessive chloride ions will be consumed; Conversely, excessive brighteners also consume chloride ions. Because too little chloride ion and too much brightener are the main reasons for the low current density area of the coating not being bright, it can be seen that the main reason for the excessive consumption of chloride ions in copper plating is the high concentration of brightener.

www.superbheater.com