The common misconceptions about titanium and titanium alloys are listed below, along with some typical errors:
One misconception: Titanium conducts heat faster than aluminum
Correct solution: The thermal conductivity of titanium is very low, close to that of stainless steel, about 1/14 of aluminum and 1/5 of iron. Cooking is prone to burning up due to this reason.
Misconception 2: High purity titanium has a high hardness
Correct answer: Pure titanium has a very low hardness, less than 120 Brinell hardness. But trace impurities can significantly increase its hardness, and its alloy is used outdoors.
Misconception 3: Titanium is a rare metal with very little content on Earth
Correct answer: The content of titanium accounts for 0.6% of the Earth's total, ranking ninth.
Misconception 4: Titanium has a lower specific gravity than aluminum
Correct answer: The density of titanium is 4.51, while that of aluminum is less than 2.7. The aluminum pot is heavy because its thickness is too large! I really miss the old-fashioned round aluminum lunch box!
Misconception 5: Titanium metal has low chemical activity
Correct answer: Dense titanium is relatively stable in air, but has strong chemical activity at high temperatures, and can strongly react with halogen elements, oxygen, sulfur, carbon, nitrogen, hydrogen, water vapor, carbon monoxide, carbon dioxide, and ammonia. Be careful when burning outdoors!
Misconception 6: Titanium metal has strong corrosion resistance to strong acids and bases
Correct answer: Titanium is easily soluble in hydrofluoric acid, concentrated sulfuric acid, concentrated hydrochloric acid, and aqua regia; Not soluble in alkaline solutions, but can strongly interact with molten alkali.
Misconception 7: Titanium metal is not easily oxidized
Correct answer: Titanium metal, like aluminum, is prone to oxidation reactions, generating oxide films that prevent further oxidation. The anodizing process is also easy to carry out.
Misconception 8: The vast majority of titanium products in the world are used in fields such as aerospace and heavy industry
Correct answer: The vast majority of titanium ore produced annually in the world is used to produce titanium dioxide pigments.
Amanda
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