During copper plating, the low-current area of ​​the circuit board surface appears "matt" phenomenon, and the concentration of chlorine is low; generally after adding hydrochloric acid, the "matt" phenomenon of the plating layer in the low current density area of ​​the board surface can disappear, and the plating solution The chloride ion concentration can reach the normal range, and the plate surface is bright. If a large amount of hydrochloric acid is added to solve the "dullness" phenomenon of the coating in the low current density area, it is not necessarily caused by the low chloride ion concentration, and the real reason needs to be analyzed. If a large amount of hydrochloric acid is added: first, it may have other consequences; second, it will increase production costs, which is not conducive to corporate competition. Correctly analyze the reason of "the coating is dull in the low current density area": By adding a large amount of hydrochloric acid to eliminate the phenomenon of "the coating is not bright in the low current density area", it means that if there are too few chloride ions, it is necessary to add hydrochloric acid to increase the concentration of chloride ions to the normal range, so that the coating in the low current density area is bright. If you need to add doubled hydrochloric acid to make the chloride ion concentration reach the normal range? What is consuming a lot of chloride ions? Too high a chloride ion concentration will cause the brightener to be consumed quickly. It shows that chloride ion and brightener will react, and excessive chloride ion will be consumed; conversely, excessive brightener will also consume chloride ion. Because too few chloride ions and excessive brightener are the main reasons that the coating is not bright in the low current density area, it can be seen that the main reason for the excessive consumption of chloride ions in copper plating is that the brightener concentration is too high. Cast Iron LV 3PH Asynchronous Motor Cast Iron Lv 3Ph Asynchronous Motor,Three Phase Asynchronous Cast Iron Motors,Cast Iron Motors,Cast Iron Electric Motor Yizheng Beide Material Co., Ltd. , https://www.beidevendor.com