A customer inquired about how to add a good passivation agent during the production process of using trivalent chromium blue white zinc passivation agent?
Based on on-site experience and the characteristics of the trivalent chromium blue white zinc passivation agent BZ-212, Bigley Technology has analyzed the two main ways to add passivation agents:
1. Manual replenishment. By changing the color of the workpiece after passivation, an appropriate amount of passivation agent or nitric acid can be added to the passivation tank in a timely manner, and the pH value of the passivation solution can be adjusted in real time. This way, the performance of the passivation solution is relatively stable, ensuring that the appearance and color of the workpiece after passivation are uniform, and the performance and quality of the passivation film are good.
2. Automatic device replenishment. Install an automatic device in the passivation solution to continuously measure the pH value of the passivation solution. By setting the upper and lower limits of the pH value and controlling the automatic device's addition of passivating agent and nitric acid mixed solution, this can ensure consistent quality of the workpiece after passivation.
However, both manual and automatic device replenishment require maintenance and management of the passivation solution. If the pH value of the calibration passivation solution needs to be measured every hour, after all, the machine may also have inaccurate times. In addition, during production, it is necessary to catch the key points where the passivation tank falls into the bottom of the tank to avoid increasing the content of iron impurities. When the zinc and iron impurities in the passivation solution are high, aging treatment should be carried out on the passivation solution to extend its service life.
So, in the production process of using trivalent chromium blue white zinc passivation agent, we can choose to add it manually or automatically, and strengthen the maintenance and management of the passivation solution to ensure stable production of the passivation solution and reduce the occurrence of faults. If you are interested in trivalent chromium blue white zinc passivation agent, please contact Bigley customer service to obtain free samples and detailed technical information!
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