Which activity can cause corrosion around antenna mountings?

Corrosion around antenna mountings can be exacerbated during the aircraft washing process. When washing an aircraft, water, cleaning agents, and detergents can enter small openings and crevices around the antenna mountings. If the materials used for the antenna mountings are dissimilar metals, the presence of water can lead to galvanic corrosion, particularly if the area is not properly sealed. Furthermore, any contaminant left behind after washing, such as soap residues or mineral deposits from hard water, can create conditions conducive to corrosion.

In contrast, painting, routine inspections, and electrostatic discharge typically do not contribute to corrosion in the way that washing does. While painting can protect against corrosion when applied correctly, improper application or damage to the paint can sometimes lead to moisture retention. Routine inspections are meant to catch potential issues before they lead to corrosion. Electrostatic discharge usually pertains to electrical interference rather than corrosion mechanisms.