Generally, the surface roughness (Ra and RMS) of all alloys increased with either EP or MEP surface treatments at both the nano and micro scale. There was no significant difference in surface area of the treated and untreated alloys at the micro scale. However, there was an appreciable increase in the surface area for the MEP surface treated alloys of NiTiCr-MEP and NiTiCu-MEP at the nano-scale dimension.