Which of the following is the primary element used for making stainless steel alloy?*1 pointb) Indiuma) Vanadiumd) Zirconiumc) Chromium

To identify the primary element used for making stainless steel alloy, we need to analyze the options provided:

1. Indium (b): Not primarily used in stainless steel production. Indium is more commonly used in electronics and batteries.

2. Vanadium (a): While vanadium is used as an alloying element in some steels for its strength, it is not the primary element for stainless steel.

3. Zirconium (d): Zirconium is not a primary component in stainless steel. It's more often associated with high-temperature and corrosion-resistant applications.

4. Chromium (c): This is the correct choice. Chromium is the main element that provides stainless steel its corrosion resistance. Stainless steel typically contains at least 10.5% chromium by mass.

Final Answer

The primary element used for making stainless steel alloy is c) Chromium.