What substances are combined in the production of metallic alloys?
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Answer: C. Chromium
Explanation
Chromium is a hard transition metal alloyed with iron to prevent oxidation and improve structural strength. Adding chromium creates a passive surface oxide layer that protects the underlying metal from corrosive agents. The inclusion of this specific metal is essential for producing high-quality stainless steel materials. Alloys are metallic mixtures composed of two or more elements designed to enhance desirable physical properties. Chromium takes its name from the Greek word chroma, reflecting the colorful compounds it forms naturally. 冶金 processes combine molten metals carefully to ensure uniform distribution of alloy constituents throughout the batch.
Option A names gypsum, which is a soft sulfate mineral used in drywall rather than metallic alloys. Option B identifies granite, a complex igneous rock composed of multiple silicate minerals instead of pure metals. Option D designates limestone, a sedimentary rock primarily composed of calcium carbonate used in cement production.
- Subject
- Everyday Science
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- Everyday Science
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- medium
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