Preparation, structure and corrosion properties of electroless amorphous Ni-Sn-P alloys

Abstract

Ternary amorphous Ni-Sn-P alloys were prepared by electroless plating. The influences of technological conditions on the deposition rate and concentration of deposits were studied in detail. The structure of deposits were examined by X-ray diffraction. The addition of tin into Ni-P alloys improved the formability of the amorphous phase. The corrosion properties of deposits immersed in 0.5 M H2SO4, 5% HCl, 10% NaCl and 50% NaOH were determined. It has been found that the addition of Sn into Ni-P deposits did not usually improve the corrosion resistance compared with that of electroless amorphous Ni-P deposits. However, the corrosion resistance of Ni-Sn-P amorphous deposits was as good as that of stainless steel, at last.