What Is The Principle Of Corrosion Resistance Of TA2 Titanium Tubing?

Titanium is a very corrosion resistant metal. However, the thermodynamic data for titanium show that titanium is a thermodynamically unstable metal. If titanium can be dissolved to produce Ti2+ its standard electrode potential is very negative (-1.63V) and its surface is always covered with an oxide film of pure titanium. This makes the stabilizing potential of titanium steadily positive, e.g., titanium's stabilizing potential in seawater at 25°C is about +0.09V.
Exposure of the titanium surface to atmosphere or aqueous solution immediately generates a new oxide film. For example, at room temperature in the atmosphere, the offspring of the oxide film is about 1.2-1.6 nm, and with the prolongation of time and thickening. 70 days later, naturally had a thickness of 5 nm, 545 days later, it gradually increased to 8-9 nm. artificially strengthen the oxidation conditions (for example, heating, the use of oxidizing agents or anodic oxidation, etc.) can accelerate the growth of the surface oxide film and get a thicker oxide film, will significantly improve the corrosion resistance of titanium.