Steam sterilization is known to corrode which type of instruments?

• A. Stainless steel
• B. Carbon steel (non-stainless)
• C. Titanium
• D. Glass

Answer: (B)

Steam sterilization exposes instruments to hot, moist conditions that drive oxidation of metals. Carbon steel, which is iron with carbon and lacks a protective chromium oxide layer, readily oxidizes in the presence of steam and water, leading to rust and surface deterioration over repeated cycles. Stainless steel and titanium resist this kind of corrosion because they form stable, protective oxide films that shield the underlying metal in moist heat. Glass isn’t a metal and doesn’t corrode in the same way, and is not typically used for sterile instrument construction. So, carbon steel is the type most prone to corrosion under steam sterilization.