What is the common feature of corrosion in aluminum alloys used in aircraft?

Corrosion in aluminum alloys used in aircraft is recognized primarily for its potential to compromise the structural integrity of the aircraft over time. Aluminum alloys, while resistant to corrosion due to the natural formation of a protective oxide layer, can develop forms of corrosion like pitting, intergranular corrosion, and stress corrosion cracking. These types of corrosion can progress undetected and may weaken the material significantly, leading to critical failures if not addressed.

Understanding that corrosion can be a serious issue highlights the importance of regular inspections and maintenance. While corrosion might sometimes appear superficial at first, its ability to undermine the strength of the alloy necessitates close monitoring and often repairs to ensure the safety and functionality of the aircraft. Therefore, recognizing the long-term implications of corrosion is crucial for ensuring the aircraft remains airworthy.