Glassy (amorphous) metals have some unique properties that may render them attractive candidates for the coating of metal-implant bearing surfaces. Metastable glasses of metal alloys, with uniform compositions and homogeneous structures that are not attainable under usual quasi-equilibrium processing conditions, can often be made to produce alloys with exceptional corrosion resistance and high hardness. The absence of secondary phases argues for resistance to abrasive and asperity-initiated wear. One method of producing glassy alloys is electrodeposition. Glassy coatings from nanometers to millimeters thick can be produced. Unique compositions, such as single-phase, amorphous, cobalt-phosphorus alloys [3,9] or glass-like coatings of cobalt-chromium-carbon [6,7] alloys (those referred to by this name throughout the text have layers of amorphous chromium and cobalt that are known to have carbon dispersed throughout the chromium), can be made.