THE 2-MINUTE RULE FOR ORTHODONTIC WIRE

The chromium within the stainless steel varieties a skinny, adherent passivating oxide layer that gives corrosion resistance by blocking the diffusion of oxygen for the fundamental bulk alloy. Roughly 12–13 wt% chromium is needed to impart the necessary corrosion resistance to those alloys.[21] There's weak proof to counsel that superelastic NiTi