It is not likely to obtain electrodeposited Ni-Co alloys with amorphous structure.The deposits become amorphous by adding element P.Electrodeposited Ni-Co-P alloys containing P less than 5% are solid solutions.The deposits containing 5%-19% P are amorphous
while deposits with P more than 19% show the structure of an intermetallic com-ound.Amorphous Ni-Co-P deposits high hardness
excellent wear resistance and good corrosion resistance in 3% NaCl solutions.