Some customers have provided feedback that during the production process using trivalent chromium blue zinc passivator, sometimes the passivation film on the workpiece may appear dull and not bright. What is the reason for this?
Based on on-site experience and product characteristics, Bigely Technology has analyzed the following five reasons:
1.The surface of the workpiece is not clean during pre-treatment. If the workpiece is not cleaned after oil removal, it will affect the brightness of the workpiece during the galvanizing process, and the brightness of the workpiece after passivation is not good.
2.The concentration of brightener in the galvanizing solution is insufficient. Brightener can improve the smoothness and brightness of the coating. If the brightener is insufficient, the coating will be dull and lack luster, and the workpiece will also be dull after passivation.
3.Improper galvanizing operation. Excessive temperature and current density during the galvanizing process can affect the brightness of the coating and also affect the brightness of passivation.
4.There are too many impurities in the galvanizing solution. Excessive impurities in the plating solution can affect the brightness of the coating, resulting in a dull finish after passivation.
5.The passivation time of the workpiece is too long. The passivation time of the workpiece is too long, and the surface oxidation reaction is severe, which affects the brightness.
So, when using trivalent chromium blue zinc passivator in the production process, we should remember these 5 points to avoid the problem of dull passivation film on the workpiece and improve production efficiency. If you want to learn more about trivalent chromium blue zinc passivator, please feel free to call us for consultation. Bigley Technology is always at your service!
