If corrosion is found on an APC cylinder, what should you do?

• A. Wipe with solvent
• B. Apply masking tape
• C. Clean with wired brush and paint red
• D. Replace immediately

Answer: (C)

Corrosion on an APC cylinder should be addressed by physically removing the corroded layer and restoring the surface, then marking it to show maintenance has been performed. Using a wired brush scrapes away loose rust and scale, exposing clean metal. Painting the area red provides a protective coating and a clear visual indication that the surface has been treated. This approach prevents further rust spread and helps you monitor the spot during inspections.

Wiping with solvent won’t adequately remove corrosion, and masking tape won’t repair the surface or protect it long term. Replacing the cylinder immediately is only needed if there are signs of compromise (such as leaks, deep pitting, or structural damage); with minor corrosion, cleaning and repainting is appropriate, followed by a careful inspection for any deeper issues.