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?
The tin plating additives used in the sulfate matte tin plating process have a direct impact on the quality of the plated layer, and the plated layer scratching is often related to the use and regulation of these additives. The type of additives, their concentration and their ratio in the plating solution will affect the final quality of the plated layer.
In the field of hard chrome plating, the use of hard chrome additives is one of the key factors in optimizing the performance of the plating solution and enhancing the quality of the plated layer. The deep plating capability of the bath refers to the ability of the chromium layer to deposit uniformly in the deep concave parts of the workpiece during the plating process, and this attribute is crucial for parts with complex shapes, deep holes or slits. Additives directly affect the conductivity, ion distribution and current density of the bath, which in turn affects the deposition rate and quality of the plated layer.
In the electroplating industry, acid copper brighteners are widely recognized as important additives to enhance the appearance of the plated layer. Acid copper brighteners improve the leveling of the plated layer by affecting the physicochemical properties of the plating solution. Brightening agents usually contain active organic molecules such as organic sulfides, aldehydes, polyethers, different types of pyridine derivatives, etc. These molecules are able to form a certain competitive adsorption phenomenon on the surface of the cathode, thus optimizing the reduction process of copper ions.
Aluminum alloy workpiece must be immersed in transition metal plating, such as immersion zinc, tin, nickel metal, in order to obtain a good combination of plating, most of the current applications in mass production to sink zinc for more than the secondary zinc process is dominant, the sinking of zinc water is generally by the market, with each accounted for half of the market. The maintenance and management of the zinc precipitation agent need to pay attention to the following points:
We know that in the copper-nickel-chromium plating process, there are often a variety of failures, in which the poor bonding of the plated layer is a plater often encountered, then, this issue of the article we will discuss the use of alloy chemical degreasing powder, what are the things need to pay attention to, so as to ensure that the bonding of the plated layer is good.
