The influence of calcium and/or phosphorus ion implantation on the structure and corrosion resistance of titanium

This work presents the data on the corrosion resistance of titanium after C a and/or P ion implantation with a dose of 10(17)/cm(2). The Ca-,(+) P+ ion energy was 25 keV. The corrosion resistance was examined by electrochemica l methods in a simulated body fluid at a temperature of 37 degreesC. TEM wa s used to investigate the microstructure of implanted layers. The chemical composition of the surface layers was examined by XPS and SIMS. The results of electrochemical examination indicate that the P and Ca + P ion implanta tion into the surface of titanium increases its corrosion resistance. Sampl es implanted with Ca showed pitting corrosion during anodic polarization. T he breakdown potentials were high (2.5-3 V). (C) 2001 Elsevier Science Ltd. All rights reserved.