What is the major type of damage to aluminum structures that is caused by exposure to the weather?

Corrosion is the major type of damage to aluminum structures caused by exposure to the weather because it is a natural chemical process where metals react with environmental elements like moisture, salts, or pollutants. When aluminum is exposed to these conditions over time, it can form oxides or other compounds that break down the integrity of the material, leading to structural weakening and potential failure. This is particularly significant in aviation, where the performance and safety of the structure are paramount.

Unlike corrosion, fatigue refers to the weakening of materials due to repeated stresses and strains, which is not directly related to weather exposure. Impact damage occurs from physical collisions or strikes, which may not occur frequently in atmospheric conditions. Delamination is primarily associated with composite materials rather than aluminum and indicates a separation of layers in a laminate due to various stress factors. Therefore, corrosion stands out as the primary concern in terms of weather-related damage to aluminum structures.