What are the two main types of corrosion found in aircraft metal structures?

The two main types of corrosion found in aircraft metal structures are uniform corrosion and localized corrosion, such as pitting. Uniform corrosion occurs evenly across a surface and is often easier to detect and manage since it typically affects the overall thickness of the metal. In contrast, localized corrosion, particularly pitting, can lead to more severe damage by creating small pits or holes that penetrate deeply into the material without significantly affecting the surrounding areas. This type of corrosion can be particularly dangerous because it may not be easily visible on the surface, yet it can compromise the structural integrity of aircraft components.

Understanding these types of corrosion is critical for maintaining aircraft safety and performance, as each type may require different inspection and repair techniques. The identification and management of both types are essential for implementing effective preventive measures, such as proper surface treatments and protective coatings, to mitigate corrosion risks.