1. Corrosion Resistance of Grade 1 Titanium
Grade 1 titanium exhibits excellent corrosion resistance in a wide range of environments. It is highly resistant to most organic and inorganic acids (such as dilute sulfuric acid, hydrochloric acid), alkalis, salt solutions, and atmospheric conditions. This outstanding corrosion resistance stems from its ability to form a dense, adherent, and self-healing titanium dioxide (TiO₂) passive film on the surface, which effectively prevents further material degradation.
2. Corrosion Resistance of Grade 1 Titanium in Concentrated Nitric Acid
Grade 1 titanium has good corrosion resistance in concentrated nitric acid under normal temperature conditions. The stable TiO₂ passive film remains intact in concentrated nitric acid, acting as a protective barrier to inhibit chemical reactions between the titanium substrate and the acid. However, its corrosion resistance may decrease significantly if the temperature exceeds 60°C or if there are impurities (such as chloride ions) present in the concentrated nitric acid.
3. Minimum Service Temperature of Grade 1 Titanium
The minimum service temperature of Grade 1 titanium can reach -253°C (liquid hydrogen temperature). Even at such an ultra-low temperature, it still maintains good toughness and ductility without brittle fracture, making it suitable for cryogenic applications (e.g., liquid natural gas storage, aerospace cryogenic systems).
4. Maximum Service Temperature of Grade 1 Titanium
The maximum long-term service temperature of Grade 1 titanium is approximately 315°C. When the temperature exceeds this limit, the oxidation rate of the material will accelerate, and the mechanical properties (such as strength and creep resistance) will gradually decline. For short-term use, it can withstand temperatures up to around 400°C under specific operating conditions.
