Nonferrous alloys: alloy with a fine gold colour used for imitation jewellery Among the given copper-based and bearing alloys, identify the one known for a gold-like colour and typical use in imitation jewellery. Choose the correct alloy.
Mechanical Engineering
Engineering Materials
Difficulty: Easy
Choose an option
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ASilicon bronze
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BAluminium bronze
-
CGun metal
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DBabbitt metal
Answer
Correct Answer: Aluminium bronze
Explanation
Given
- Identify the alloy with a gold-like appearance commonly used for imitation jewellery.
ConceptAluminium bronze (Cu–Al, typically 5–12% Al) exhibits a distinct yellow-gold colour and good corrosion resistance, making it suitable for decorative applications including imitation jewellery.
Eliminate options
- Silicon bronze: typically reddish-brown; excellent corrosion resistance but not especially gold-like.
- Gun metal: Cu–Sn–Zn; greyish bronze, used for bearings/valves.
- Babbitt metal: soft bearing alloy (Sn/Sb/Cu or Pb/Sb/Sn), silver-grey, not decorative.
Final AnswerAluminium bronze