Papers by Keyword: Electroplated Coating

Abstract: In the present study 304 stainless steel (SS) was electrochemical plated with nanocrystallineMn-Cu alloy coatings from a bath containing ammonium sulfate.The electrochemical investigation of Mn-Cu electrodeposited films was managed by potentiodynamic scans and galvanostatic experiments. The effect of current density on the microstructure, crystallographic structure, and chemical composition of the deposits were characterized by means of scanning electron microscopy (SEM), X-ray diffraction (XRD), and energy dispersive x-ray spectrometry (EDS), respectively.The results showed that Mn-Cu coatings obtained at low current density contain a large amount of Cu and heterogeneous microstructure, while at high current density uniform, compact, and amorphous coatings with a small amount of Cu was obtained. The results indicated that Cu co-deposition delayed the phase transformation of as-deposited ductile γ-Mn to the brittle and hard α-Mn. However, the results did not show any specific changes in grain size of the coatings with variation of current densities.

Abstract: In this study, wood surface was treated in metal processing using Cu/Ni electroplate methods. The bonding force and surface morphology between metal coatings and wood pores were measured by SEM. The non-lubricated friction was tested using the MMW-1 vertical universal friction and wear testing machine. Then the waterproof performance was measured by contact angle tester. The results show that the wood still remained original pore structure after treated by copper electroplate and nickel electroplate, but the surface had been completely covered by metal coating. The dense of coating was compact and uniformly distributed, the interfacial bonding was well. After the wood treated by Cu/Ni, the friction coefficient declined from 0.04-0.12 to 0.004 and 0.003, and the friction torque decreased from 10-30N.mm to 1N.mm, at the same time the average of hardness increased from 6.42HV to 93.18HV and 226.86HV. The treated metal-wood surface has higher wear-resisting property and hardness.