INFLUENCE OF LOW PHOSPHORUS CONCENTRATION ON THE ELECTROCRYSTALLIZATION AND THE PROPERTIES OF NI-P FOILS

The influence of phosphorus incorporation during electrodeposition of thin (10 to 60 pm thick) nickel foils on anodized titanium substrates is studied. The texture, structure, and magnetic properties of these foils are influenced considerably by the presence of low phosphorous acid concentrations in the electrolyte. The transition between the fibrous structure of the pure nickel crystalline deposits obtained in Watt's bath and the Ni-P amorphous structure of the deposits obtained in Brenner's bath is emphasized. Electrodeposition is a useful technique for production of thin corrosion resistant Ni-P foils with or without magnetic properties, as a function of the phosphorus concentration.