Which material would accumulate the most grease?

Which material would accumulate the most grease?

• A. Plastic
• B. Bronze
• C. Cast Iron
• D. Stainless Steel

Answer: (C)

Grease retention is driven by how rough and porous a surface is. Cast iron has a rough, micro-porous surface from the casting process and any surface scales or pits, which create tiny pockets that trap oil and grease. Those pockets hold onto grease and resist wiping clean, so grease accumulates over time. In contrast, stainless steel is smooth and non-porous, so grease sits on the surface and washes off more easily. Bronze can be smoother than cast iron but isn’t as prone to trapping grease as cast iron, and plastic surfaces vary but are often easier to wipe clean than a highly porous metal. So cast iron ends up accumulating the most grease due to its porous, rough surface.

Grease retention is driven by how rough and porous a surface is. Cast iron has a rough, micro-porous surface from the casting process and any surface scales or pits, which create tiny pockets that trap oil and grease. Those pockets hold onto grease and resist wiping clean, so grease accumulates over time. In contrast, stainless steel is smooth and non-porous, so grease sits on the surface and washes off more easily. Bronze can be smoother than cast iron but isn’t as prone to trapping grease as cast iron, and plastic surfaces vary but are often easier to wipe clean than a highly porous metal. So cast iron ends up accumulating the most grease due to its porous, rough surface.