Which condition can accelerate the corrosion of aircraft metals?

The condition that can accelerate the corrosion of aircraft metals is the presence of moisture and contaminants. Corrosion is a chemical reaction that occurs when metals are exposed to moisture, oxygen, and various contaminants such as salt, dirt, or chemicals. When these elements combine, they create an environment conducive to corrosion processes, such as galvanic corrosion and pitting, which can significantly compromise the integrity of the metal components in an aircraft.

Moisture serves as an electrolyte, facilitating the movement of electrons between anodic and cathodic areas on the metal surface, thus accelerating the corrosion process. Additionally, contaminants can either directly promote corrosion or interfere with protective coatings, leading to further deterioration of the metal. Therefore, managing moisture and keeping surfaces clean and free from harmful contaminants is crucial in preventing corrosion and maintaining the structural integrity of aircraft metals.