Which type of metal does not typically rust?

Which type of metal does not typically rust?

• A. Stainless steel
• B. Copper
• C. Aluminum
• D. Brass

Answer: (A)

Stainless steel is an alloy known for its resistance to corrosion and rust, making it an ideal choice in environments where moisture is present. The primary reason for this resistance is the addition of chromium, which forms a passive layer of chromium oxide on the surface of the steel. This layer acts as a barrier, preventing oxygen and moisture from reaching the underlying metal and thereby inhibiting rust formation. While copper, aluminum, and brass can corrode, they do not typically rust in the same manner as iron-based metals, which are prone to oxidizing and forming rust. Copper develops a patina over time, which can protect it from further corrosion. Aluminum forms a thin oxide layer that also helps protect it from degradation. Brass, an alloy of copper and zinc, exhibits some corrosion resistance, but not to the same extent as stainless steel. Therefore, stainless steel is recognized for its superior ability to withstand rusting, making it the most suitable answer to the question.

Stainless steel is an alloy known for its resistance to corrosion and rust, making it an ideal choice in environments where moisture is present. The primary reason for this resistance is the addition of chromium, which forms a passive layer of chromium oxide on the surface of the steel. This layer acts as a barrier, preventing oxygen and moisture from reaching the underlying metal and thereby inhibiting rust formation.

While copper, aluminum, and brass can corrode, they do not typically rust in the same manner as iron-based metals, which are prone to oxidizing and forming rust. Copper develops a patina over time, which can protect it from further corrosion. Aluminum forms a thin oxide layer that also helps protect it from degradation. Brass, an alloy of copper and zinc, exhibits some corrosion resistance, but not to the same extent as stainless steel. Therefore, stainless steel is recognized for its superior ability to withstand rusting, making it the most suitable answer to the question.