What type of degradation can moisture cause in aircraft materials?

Moisture can significantly impact aircraft materials by contributing to corrosion and fatigue, which are serious forms of degradation. Corrosion occurs when moisture reacts with metal surfaces, leading to the breakdown of the material. This can happen in various components made from aluminum, steel, or other metals, where the presence of water can accelerate oxidation reactions, resulting in material loss and weakening of structural integrity.

Fatigue, on the other hand, arises from cyclic loading conditions combined with the presence of moisture, which can exacerbate micro-cracking and initiate failures in materials. When moisture seeps into these cracks, it can lead to further degradation, reducing the overall lifespan of the component or structure. This dual effect of moisture highlights the importance of proper sealing, maintenance, and environmental control measures in aircraft design and operation to mitigate the risks associated with corrosion and fatigue.

The other choices do not accurately reflect the impact of moisture on aircraft materials. Strength enhancement, increased weight, and improved resilience are generally not outcomes associated with moisture exposure; rather, they signify attributes that can be negatively affected by it.