Reducing agent plays a central role in the electroless copper plating solution, and its selection and use have a significant impact on the quality of the copper chemical coating, deposition rate, and the stability and efficiency of the entire electroless copper plating process.
Electroless nickel plating technology is widely used in industrial fields, and the hardness of nickel layer is an index to guarantee the wear resistance of parts. This article summarizes the main factors affecting the hardness of electroless nickel plating layer: bath composition, plating solution pH, temperature.
Mr. Liu in Huizhou, Guangdong Province, is an electroplating factory owner engaged in the galvanization processing of various hardware products and stamping parts. Recently, Mr. Liu found that the black passivation solution always exceeds the phosphorus standard when discharging wastewater, as this violates the discharge standard of the electroplating park, so Mr. Liu would like to replace a phosphorus-free black zinc passivation solution in a hurry.
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.
