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?
Bigely trivalent chromium galvanized black passivation solution BZ-216 is a black passivate designed for pickled zinc deposits in the galvanizing process. It produces a dense, homogeneous and highly corrosion resistant black passivate film on the galvanized surface, which enhances the decorative and protective properties of the coating.
In the electronic soldering industry of integrated circuits, a layer of solderable tin plating is usually plated on the component pins to improve the soldering performance of electronic devices, and the current application of solderable tin plating layer is necessary and irreplaceable. However, in practice, the solderability of the plating is prone to failure.
Some customers inquire that the brightness of the plated layer of Bigely Sn-807 tin plating brightener is really that good, this article will introduce it.
In the chromium plating process, the size of the current is one of the most important parameters in determining the quality of the plated layer. The size of the current affects the deposition rate, deposition uniformity, gloss, hardness and adhesion of the coating in many ways.
