Multiple choice

Which element is added to steel to produce stainless steel?

  1. Copper

  2. Aluminium

  3. Chromium

  4. Tin
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Stainless steel contains at least 10.5% chromium, which forms a protective oxide layer on the surface. This layer prevents corrosion and gives stainless steel its rust-resistant properties. Nickel and molybdenum are often added too.

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