In Vitro Corrosion Studies of Surface Modified NiTi Alloy for Biomedical Applications

Table 4

Atomic concentration of Ni and Ti for untreated and surface treated NiTi alloys from XPS data.

Sample	Ti (at.%)	Ni (at.%)	O (at.%)	Ti/Ni ratio
Bare NiTi	19.1	10.6	70.3	1.8
EP20V	26.9	7.1	66.0	3.8
EP20VPIE	24.1	0.8	75.1	30.1