In the hanging galvanizing process, when trivalent chrome blue zinc passivator is used for production, sometimes there will be color difference in the passivation film of the upper and lower rows of workpieces. What should we do?
Mr. Luo of Cangzhou, Hebei Province, is the owner of an electroplating factory that does the production and processing of hanging galvanized metal stamping parts.Recently, the color difference between the upper and lower rows of Mr. Luo's galvanized workpieces after blue passivation is large.The workpiece passivation time is about 1 minute, and the idle stop time is about 35 seconds.After passivation, the upper row of workpieces is light and not blue enough, while the lower row of workpieces is dark and yellow-green.This kind of workpiece is not acceptable to customers, and the performance and quality of the workpiece are also quite different, such as coating thickness, corrosion resistance, etc.Therefore, Mr. Luo wants to find a trivalent chrome blue zinc passivator that can meet his production requirements.
One day, Mr. Luo improved his online search and saw Bigolly's trivalent chrome blue zinc passivator BZ-212, and learned about the characteristics of this passivator in detail.After understanding the production process of Mr. Luo, the engineer told Mr. Luo that this BZ-212 is a trivalent chrome blue passivator specially designed for the hanging galvanizing process. It is prepared with imported raw materials and has good stability and uniformity in the production process. After the workpiece is passivated and idle for 20-40 seconds, the hole position and concave will not turn yellow, and can still maintain a uniform and bright blue appearance.This is very suitable for the galvanizing and passivation requirements of automatic lines such as ring line, vertical lifting line and gantry line.Mr. Luo was very interested in this characteristic of this blue zinc passivator and immediately bought a barrel.
Under the guidance of the engineer, after using this trivalent chrome blue zinc passivator, Mr. Luo reported that there was almost no color difference between the upper and lower rows of the workpiece after passivation, and there would be no yellowing at the hole position and water drip position of the workpiece.The coating thickness of the workpiece has good uniformity and corrosion resistance. It can pass 96 hours of neutral salt spray test, which can fully meet the customer's requirements.So Mr. Luo placed an order again and signed a purchase and sales contract with Bigolly.
Therefore, when the color difference between the upper and lower rows of our galvanized workpieces after blue passivation is large, try this trivalent chrome blue zinc passivator BZ-212 quickly to effectively improve production efficiency.If you are interested in this trivalent chrome blue zinc passivator, please contact Bigolly customer service for free samples and detailed technical information!