Which property primarily affects the choosing of rivet materials in aircraft structures?

The primary property that affects the selection of rivet materials in aircraft structures is corrosion resistance. This is critical because aircraft are often exposed to harsh environmental conditions, such as moisture, salt, and varying temperatures, which can lead to corrosion if the materials used are not adequately resistant.

Corrosion in rivets can lead to structural weaknesses and failures, which endangers the safety and integrity of the aircraft. Therefore, materials chosen for rivets are typically those that can withstand these corrosive environments while maintaining their strength and durability over the lifespan of the aircraft.

While cost, weight, and other factors like color may be considered in specific situations, they do not outweigh the necessity for corrosion resistance. Rivets are usually made from stainless steel or aluminum alloys that boast excellent corrosion resistance to ensure long-term performance in aviation applications.