In the chrome plating process, sometimes the surface of the workpiece produced is cracked at the tip position or edge area, which can seriously affect the appearance and performance of the workpiece. Is the cracking phenomenon caused by improper use of chrome plating additives?
1. Cracks in the chromium plating layer in the retreat of the chromium layer after the nickel plating layer is normal without cracks. This is mainly due to the high sulfuric acid content in the plating solution, making the chromium layer deposition rate is too fast, the stress of the chromium layer increases and produces micro-cracks. In addition, when the thickness of the chromium layer is thicker (> 0.50 μm), the chromium layer will produce microcracks or even microcracks visible to the naked eye, this situation requires proper control of the thickness of the chromium plating layer, because the general thickness of the chromium layer to reach 0.25 μm to achieve the purpose.
2. When the cracks appear on the surface of the chromium plating layer, after the withdrawal of chromium plating layer, nickel surface cracks on the phenomenon, this is the nickel plating layer of stress is too large resulting in cracks in the nickel plating layer, so that the chromium plating layer also appears cracks. Appearance of such micro-cracks in the nickel plating layer, in the nickel plating process should pay attention to control the content of organic impurities in the plating solution, if necessary, the need for organic impurities.
About us
Guangdong Bigely Technology Co., Ltd. ,founded in 2003, is a high-tech enterprise integrating R & D，production, sales and service, specializing in the production of electroplating additives. As a famous electroplating additives source manufacturer in China, our products are widely used to meet the plating needs of different industries and exported to many countries from all over the world. They can meet the environmental protection standard after use, mainly used in automobile parts, sanitary ware, electronic products, hardware, furniture, building accessories and other fields.
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