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?
Some customers inquired that in the production process of using acid zinc brightener, the workpiece low concavity of the plating layer appeared to be dark and not bright phenomenon, what is the reason for this?
The zincate galvanizing process results in the appearance of pockmarks in the plating, which can be caused by several different factors. Pocking is a phenomenon of localized unevenness, roughness and bubbles on the surface of the plating, which may affect the overall appearance and corrosion resistance of the plating. Common causes include the following:
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.
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.
Austenitic stainless steel, with its excellent corrosion resistance and good plasticity, is widely used in demanding industrial fields, such as chemical, food processing and Marine applications. However, when these materials need to operate in more demanding environments, such as high wear or pressure, additional enhancement of surface hardness and wear resistance is necessary. Electroplating hard chromium is an effective means to improve the surface properties of austenitic stainless steel, not only to improve the hardness, but also to maintain or improve the original corrosion resistance.
