In the process of using zinc-nickel alloy natural color passivator, when there is a problem with the passivation film, such as blue passivation film, is this caused by the problem of passivator? Actually, it's not. Maybe it's the plating solution.
Mr. Jiang is from Dongguan City, Guangdong Province, specializing in a variety of standard fasteners zinc-nickel alloy processing plant owner. Recently, the surface of the zinc-nickel alloy workpiece electroplated by Mr. Jiang will always turn blue when the natural color is passivated, which seriously affects the appearance and performance of the workpiece. Mr. Jiang turned to Bigley to help solve the problem.
After the engineer rushed to the site, according to the site experience and the characteristics of the product zinc nickel alloy brightener and zinc-nickel alloy natural color passivator Zn-325, after checking the production situation of the production line, it was found that Mr. Jiang's passivation solution was not wrong, and the problem was in the plating solution. Originally, it was because the operator on Mr. Jiang's production line did not control the nickel ions in the plating solution, resulting in high zinc and low nickel in the plating solution, and the zinc content in the alloy coating was too high, so that the passivation film would appear blue or brown when the natural color was passivation.
Therefore, the engineer trained the operator, the plating solution should control the concentration of nickel ions, the production process should be timely analysis of the concentration of nickel ions, and appropriate nickel additives, so that the alloy coating in order to obtain stable nickel content; But also to control the proportion of zinc nickel ions in the plating solution, generally zinc /(zinc + nickel) concentration ratio of 0.15-0.17, and the total concentration of zinc nickel ions in 0.17-0.40mol/L, you can get about 13% of the zinc nickel alloy coating. After Mr. Jiang adjusted the plating solution under the guidance of the engineer, the natural color of the workpiece was passivated and there was no blue phenomenon.
Therefore, in the zinc-nickel alloy plating, the surface of the passivation film is prone to blue phenomenon after the natural color passivation of the workpiece, not that this zinc-nickel alloy natural passivator is not good, but to analyze the plating solution and make timely adjustments. If you are interested in zinc-nickel alloy natural color passivator, please contact Bigely customer service for free samples and detailed technical information!
