Mr. Guo's company is one of the top ten automotive parts processing plants in the industry in Nanchang, Jiangxi. His customers have high requirements for workpieces, so workpieces need to have good appearance and performance requirements. Recently, after using zinc nickel alloy trivalent chromium black passivation agent on Mr. Guo's workpiece, the passivation film always shows a phenomenon of discoloration, which seriously affects the appearance performance of the workpiece. However, there were no issues with the concentration of the passivation solution and process parameters, so Mr. Guo urgently wanted to solve the problem of discoloration of the passivation film.
By chance, Mr. Guo searched online and found the zinc nickel alloy trivalent chromium black passivation agent Zn-327 from Bigley Technology, and consulted in detail about the characteristics of this passivation agent. Mr. Guo is quite concerned about the phenomenon of discoloration in the passivation film of the workpiece. Bigley engineers patiently introduced to Mr. Guo that this passivation agent Zn-327 is a product improved by Bigley through technology. With a simple impregnation process, a black decorative passivation film with high corrosion resistance can be produced on the zinc nickel alloy coating, and the passivation film is bright and black without discoloration. Mr. Guo compared several pieces of workpiece renderings and decided to purchase one barrel for use first.
Half a month later, Mr. Guo called and said that after testing the black passivation agent Zn-327, the appearance of the workpiece was quite satisfactory without any discoloration. Moreover, after 240 hours of neutral salt spray testing, there was no white rust on the workpiece. Both the appearance and corrosion resistance of the passivation agent were better than the previous one. In this way, Mr. Guo signed a procurement contract with Bigley.
So, when our workpiece undergoes black passivation of zinc nickel alloy, and the passivation film always shows a phenomenon of discoloration, we might as well try Bigley's zinc nickel alloy trivalent chromium black passivation agent Zn-327. If you also want to find such a zinc nickel alloy trivalent chromium black passivation agent, you can contact Bigley customer service to obtain free samples and detailed technical information!
If you want to learn more about zinc nickel alloys, you can click to view the "Common problem".