Corrosion and electrochemical behaviour of amorphous and crystallic Ti-Co-P and Ti-Ni-P alloys

Effect of phosphoric additions on corrosion of Ti-Ni and Ti-Co in ION and 5N sulphuric acid has been investigated on crystalline specimens as well as on amorphous and amorphous-crystalline strips, prepared by rapid quenching from melt. Phosphorus additions are shown to improve corrosion resistance both of crystalline and amorphous alloys. Phosphorus effect manifets itself in hydrogen overvoltage decrease and in retardation of anodic decrease and in retardation of anodic process. Amorphous alloys are found to have lower corrosion rates than those in crystalline state