Electrodeposition of amorphous Ni-P alloy coatings

摘要

A process to produce amorphous Ni-P alloy coatings from nickel sulfate and hypophosphite bath be electrodeposition was investigated. The influence of the concentration of phosphorous and pH in the bath, the plating temperature and the organic additives ware determined. The X-ray energy dispersive spec- troscopy (EDAX) was used to evaluate the composition of the alloy coatings. The alloy coatings containing over 10/100-12/100 P(mole percent) were distinguished to be amorphous by X-ray diffraction, they were found to have better corrosion resistance than the conventional Ni-Vr stainless steel in 5/100 HCI, H_2SO_4, NaCl and NaOH solutions.