阐述了亮镍镀层孔隙率的危害及影响因素(包括镀层厚度,基体缺陷和粗糙度,待镀表面的洁净度,以及镀液的维护).介绍了降低亮镍镀层孔隙率的主要措施.针对钢铁件上镀薄层亮镍高孔隙率的问题,测试了几种水基缓蚀剂及水溶性清漆的封闭效果,但结果令人失望.采用水溶性蜡封闭剂的效果则较好.
The hazards of porosity for bright nickel coatings and its affecting factors, such as the coating thickness, defects and roughness of substrate, cleanliness of the surface to be plated, and maintenance of plating bath, were expatiated. The main measures for reducing porosity of bright nickel coatings were introduced. Some sealing methods using water-based corrosion inhibitors and water-soluble lacquers were tested to solve the high porosity problem of thin bright nickel coating on iron and steel workpiece. However, the results were disappointed. Sealing with water-soluble wax showed better effectiveness.
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