What major factor contributes to the occurrence of corrosion?

Moisture is a significant factor that contributes to the occurrence of corrosion. Corrosion is an electrochemical process that typically requires the presence of water or moisture to facilitate the reactions between metals and their surrounding environment. When water is present, it acts as an electrolyte, promoting the movement of ions that lead to the deterioration of metal surfaces.

The process of corrosion can be exacerbated when moisture is combined with other elements, such as salts, pollutants, or acids, which can further accelerate the reaction. This is especially important in aviation environments where aircraft are exposed to varying weather conditions, including rain, fog, and humidity, increasing the risk of corrosion on metal components.

While factors like low temperatures, vibrations, and high humidity can influence corrosion rates, moisture is the primary catalyst for the chemical reactions that cause corrosion to initiate and progress. Recognizing the central role of moisture in corrosion processes is vital for effective maintenance and protection of aircraft structures and components.