When using hard chromium additives and analyzing CrO3 and Cr3+, in addition to paying attention to the calibration of ammonium ferrous sulfate before use, ensuring a large titration jump range, and controlling the heating time of ammonium persulfate, it is also necessary to pay attention to the fourth point.
What matters? That is to compare the color of the tank liquid with the trivalent chromium analysis results.
Why should we do that?
If the content of trivalent chromium in the plating solution is low, then the technicians of the plating plant are very prone to deviation in the analyzing process, in this case, we can use the method of comparing the production experience with the analyzing result.
Under normal circumstances, the chromium plating bath is dark red, because the hydration ion of Cr3+ in acidic solution is purple, if the content of Cr3+ in the bath is high, then the bath color is deep and thick, if the content of trivalent chromium is low, then the color of the bath is light.
If the results of the Cr3+ chemical analysis, do not match the color of the tank solution, we need to review the procedure and re-sample for analysis.
Conclusion
When customers use Bigely hard chrome additives, they often need to pay attention to the analysis of the plating solution, because the quality of the plating layer and the content of the plating solution is closely related to the content of the plating solution, under the guidance of our technical engineers, we can do a good job of analyzing the work of the plating solution composition in a timely manner to make adjustments and make up for the plating solution, and to produce good-quality plating layer.
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