The service cycle of electroless nickel plating solution refers to the length of time that the solution can be effectively used, during which the solution can maintain its chemical properties and the quality of the coating. This cycle is affected by a number of factors, including the initial formulation of the solution, the amount of loading, the level of maintenance and management, and the quality requirements of the coating.
Mr. Shen from Jiangsu Province, is the owner of an electroplating factory engaged in acid galvanizing processing of various hardware parts. Recently, in the production process of using black zinc passivator, Mr. Shen found that the corrosion resistance of the black zinc workpiece after sealing is very poor, the workpiece is basically white rust after 24 hours of salt spray test, and the sealing film is easy to fall off, the customer can not accept such a workpiece. However, Mr. Shen extended the drying time of the workpiece, but there was still no improvement. The above Mr. Shen wants to search the Internet to see how this situation should be solved.
Some customers said that they used alkaline galvanized production process, after the use of colored zinc passivator, they found that the workpiece will appear very serious discoloration phenomenon, resulting in the need to return the workpiece for rework, which caused great economic losses. So, what causes the coating of the workpiece to discolor?
To achieve a bluer trivalent chromium blue zinc passivate film color, some parameters in the passivation process need to be carefully adjusted. The following are some of the factors that may affect the color of the passivate film:
In acid galvanizing process, the binding force of the coating is affected by many factors, so it is very important to ensure good adhesion between the coating and the substrate. The factors that affect the binding force include surface preparation, plating solution composition and operating conditions.
Mr. He in Dongguan, Guangdong Province, is a boss engaged in various electronic components electroplating tin. Recently, Mr. He found in production that the plating solution is easy to turbidity after using fog tin additives, and the plating solution must be treated once every three or five days, so the processing cost of the plating solution is high. So Mr. He wants to replace a good performance of methylsulfonic acid matte tin additive.
