Common Misunderstandings About Titanium Metal
One of the misunderstandings: The thermal conductivity of titanium is faster than that of aluminum. Correct answer: The thermal conductivity of titanium is very low, close to stainless steel, about 1/14 of aluminum and 1/5 of iron. Therefore, this is the reason why cooking is easy to burn.
Misunderstanding 2: High-purity titanium has a very high hardness. Correct answer: Pure titanium has a very small hardness, less than 120 Brinell hardness. However, trace amounts of impurities can significantly increase its hardness, and titanium products for outdoor use are mostly alloys.
Myth No. 3: Titanium is a rare metal, and its content on the earth is very small. Correct answer: The content of titanium accounts for 0.6% of the earth, ranking ninth.
Myth No. 4: The specific gravity of titanium metal is smaller than that of aluminum. Correct answer: The density of titanium is 4.51, while the density of aluminum is less than 2.7. Aluminum pots are heavy because they are so thick! I especially miss the old round aluminum lunch box!
Myth No. 5: The chemical activity of titanium metal is very low. Correct answer: Dense titanium is relatively stable in the air, but is highly chemically active at high temperatures and can interact with halogen elements, oxygen, sulfur, carbon, nitrogen, hydrogen, water vapor, Carbon monoxide, carbon dioxide and ammonia act strongly. Be careful when dry burning outdoors!
Myth No. 6: Titanium metal has strong corrosion resistance to strong acids and alkalis. Correct answer: Titanium is easily soluble in hydrofluoric acid, concentrated sulfuric acid, concentrated hydrochloric acid and aqua regia; it is not soluble in alkali solutions, but can interact strongly with molten alkali. .
Myth No. 7: Titanium metal is not easily oxidized. Correct answer: Titanium metal is as prone to oxidation reactions as aluminum, forming an oxide film to prevent further oxidation. The anodizing process is also easy to perform.
Myth No.8: The vast majority of titanium products in the world are used in aerospace and heavy industry. Correct answer: The vast majority of titanium ore produced in the world every year is used to produce titanium dioxide pigments.
