Abstract
The bending characteristics and corrosion resistance were investigated using TiN ion-plated specimens of Al-Cu, Al-Mg system wrought alloys and Al-Si system casting alloy.Results:1.Bending characteristics 1)The proof stress values of these specimens ranged from 91.1 to 231.1MPa.Those of ion-plated materials to wrought used alloy, however, reduced to half of those of the original materials.It was suggested that this was due to the thermal effects of ion-plating procedures.2)The elastic coefficients of these specimens ranged from 7.1 to 8.1×104MPa.3)It was estimated that the practical thickness of aluminum system alloys ion-plated for use as a denture base was from 0.8 to 1.3mm.2.Corrosion resistance 1)Pitting corrosion was only observed on ion-plated specimens of Al-Cu system alloy by means of immersion in an artificial saliva.2)From the results of an electrochemical test, it was suggested that the material had a tendency to give rise to pitting corrosion when the breakdown potential was closed to the corrosion potential.3)The current density of ion-plated specimens of Al-Mg and Al-Si system alloy decreased to 1/50 or 1/170 in comparison with that of original specimens at zero voltage on an anodic polarization technique in an artificial saliva.
