In the potassium chloride galvanizing process, if the boric acid content is low, then the coating is prone to failure. In this case, how to control the amount of boric acid to be added?
In the Hall cell test, if the high-end scorch area of the chip is wide, the PH value is normal, the technician adjusts the other components but does not get significantly better, and the PH value of the bath rises too fast, then it may be the boric acid mass concentration is low, at this time we can add 5~10g/L boric acid.
In general, it is recommended to add a little more boric acid (the content needs to be controlled between 30-35 ° C), and we can use the seasonal temperature according to the specific operation to not precipitate as a judgment standard. In this way, when we judge the fault, we can exclude this influencing factor.
The refrigerator can also be used to determine the approximate boric acid content
Customers in the use of Bigely potassium chloride galvanized brightener, will also consult whether there is a more convenient way to determine the boric acid content, if you do not want to play the Hall cell test, you can also use another method, take the appropriate amount of plating solution placed in the refrigerator, 4℃ or so for ten minutes, if the boric acid in the plating solution is within the normal range, there should be more boric acid precipitation, if the precipitation is very little, Boric acid should be added about 10g/L, dissolved in boiling water, and then added, generally potassium chloride: boric acid is added about 7:1.