Tailoring the Surface of NiTi Alloy Using PIRAC Nitriding Followed by Anodization and Phosphonate Monolayer Deposition

NiTi was nitrided using a powder immersion reaction assisted coating (PIRAC) method based on annealing in an atmosphere of highly reactive nitrogen. Phosphonate-anchored SAMs can be deposited on PIRAC nitrided NiTi after anodization. The Ni-free TiN functions as a corrosion barrier while the SAM provides control over surface chemistry.