替代电镀铬的碳化硅类复合电镀技术研究进展

针对目前工业应用中对替代电镀铬工艺的绿色表面技术需求,介绍了物理气相沉积、热喷涂、冷喷涂、超高速激光熔覆、复合电镀技术的原理、特点、应用,以及替代电镀铬工艺的优势和局限性,重点对碳化硅类材料复合镀技术的研究进展进行了综述,介绍了Ni-SiC、Cu-SiC、Zn-SiC、Ni-P-SiC、Ni-SiC-GO镀层的主要应用...

Advances in Silicon Carbide Composite Electroplating Technology to Replace Chromium Electroplating

In view of the current green surface technology requirements for alternative electroplating chromium technology in industrial applications, the work reviewed the principles, characteristics and applications of physical vapor deposition, thermal spraying, cold spraying, ultra-high speed laser cladding, and composite electroplating technology, as well as advantages and limitations, focusing on the research progress of silicon carbide composite coating technology; the main applications of Ni-SiC, Cu-SiC, Zn-SiC, Ni-P-SiC, and Ni-SiC-GO coatings; the effect and mechanism of the addition of graphene and graphene oxide to the electrolyte components to improve the corrosion performance of composite coatings; the effects of electrolyte pH value, temperature, and concentration on the performance of the coating (The pH value and temperature in different electrolyte systems were different. When the concentration reached the optimal value, the coating performance can reach the best.); the influence of SiC particle size and dispersion method on the performance of the coating (If the particle size was too small, it was easy to agglomerate, if the particle size was too large, and the deposition amount was reduced. Additive and physical agitation can effectively solve the problem of particle agglomeration and increase the amount of particle deposition, thereby improving the coating performance; the influence of power parameters on composite coating (In the composite plating process, parameters such as current density, electrical mode (pulse and DC), and duty cycle should be optimized). Finally, the work summarized the development trend of silicon carbide composite plating technology, that is, the process design is going green. The plating solution system is diversified and the process control is developed towards intelligence.