Why are aluminum outdoor chairs more prone to visible scratches than stainless steel?

Aluminum outdoor chairs are more prone to visible scratches compared to stainless steel due to their softer material composition. Aluminum, while lightweight and corrosion-resistant, has a lower hardness rating on the Mohs scale, making it more susceptible to surface marks from everyday use, debris, or cleaning tools. Stainless steel, on the other hand, contains chromium and other alloys that enhance its hardness and scratch resistance. Additionally, aluminum's natural oxide layer, which protects against rust, is thinner and less durable than stainless steel's passive film. This difference in material properties explains why scratches on aluminum chairs appear more prominent and require more frequent maintenance to preserve their appearance. For outdoor furniture, choosing between aluminum and stainless steel often involves balancing weight, cost, and long-term durability.