Mr. Wu is a master at a zinc plating factory in Shantou, mainly engaged in the processing and production of acidic zinc plating for hardware accessories. One day, Mr. Wu used an acidic zinc plating solution with a brightener for impurity removal. However, when the plating solution was finished and produced, the workpiece was gray and not shiny, and the addition of the brightener did not significantly improve. What is the reason for this?
Due to Mr. Wu's lack of equipment for Hull slot cutting on site, he sought help from engineers from Bigley to solve the problem. The engineer conducted experiments on adding brightener to the Hull groove and found that the coating did not brighten after adding brightener. So the engineer and the online operator learned about the process of plating solution treatment. Afterwards, the engineer suspected that there was still hydrogen peroxide residue in the plating solution, so after heating and holding the plating solution for 2 hours, the plating layer of the Hull cell flake had returned to brightness.
Originally, the online operators did not completely remove the hydrogen peroxide from the plating solution in order to shorten the processing time. The residue of hydrogen peroxide will oxidize the brightener, resulting in insufficient concentration of the brightener. At this time, the galvanized layer will turn gray and not shine. With the assistance of engineers, Mr. Wu's plating solution was heated to remove residual hydrogen peroxide. The coating on the treated workpiece has significantly brightened during the trial plating process.
After the malfunction of the plating solution treatment, Mr. Wu learned a lesson, and after the impurity removal treatment of the plating solution, there was no residual hydrogen peroxide that caused the coating to turn gray and not shine. So, when using acidic zinc plating brightener for impurity removal treatment, hydrogen peroxide should be removed thoroughly under heating and insulation to reduce the occurrence of faults. If you are interested in acidic zinc plating brighteners, please contact Bigley customer service for free samples and detailed technical information!
If you want to learn more about galvanizing, you can click to view the "Common problem".
