铸造铝-硅合金化学镀镍-磷-铈合金镀层

Electroless Ni-P-Ce Plating on Casting Al-Si Alloy

在铸造铝-硅合金表面化学镀镍-磷-铈合金镀层,并对其微观形貌、成分、晶相结构、耐蚀性及硬度进行了观察与测试。结果表明:镀层为晶体结构,铈的加入可以细化镀层晶粒;添加硝酸铈得到的化学镀镍-磷-铈合金镀层的耐蚀性更好;化学镀镍-磷-铈合金镀层镀态的硬度比基体的高242.8 MPa,并随着热处理温度的升高而增大。

Electroless Ni-P-Ce plating on casting AI-51 alloy surface was carnect out, ana me microscopic morphology, composition, crystal phase structure, corrosion resistance and hardness of electroless Ni-P-Ce alloy coating were observed and tested. Results showed that the electroless Ni-P-Ce alloy coating with crystal structure, and cerium can refine grains. The electroless Ni-P- Ce alloy coating prepared from the plating solution containing cerium nitrate exhibit better corrosion resistance. Compared with the matrix hardness, the hardness of as-plated electroless Ni-P-Ce alloy coating increased by 242.8 MPa, and it increase with the rising of heat treatment temperature.