Which item is NOT listed as a major cause of avionics corrosion?

Which item is NOT listed as a major cause of avionics corrosion?

• A. Light exposure
• B. Moisture
• C. Dirt
• D. Salt

Answer: (A)

The factor that drives avionics corrosion is that corrosion is an electrochemical process that needs an electrolyte. Moisture provides that electrolyte, allowing ions to move and reactions to occur on metal surfaces. Salt accelerates this by supplying ions that increase conductivity and the rate of the corrosion reactions, especially in humid or coastal environments where salt spray is present. Dirt and dust contribute by trapping moisture and salts on surfaces and creating localized corrosion sites where coatings can break down or shields can be bypassed. Light exposure, while it can affect materials in other ways (such as degrading coatings or plastics), does not create the conductive environment or chemical reaction necessary for corrosion to proceed, so it isn’t listed as a major cause.

The factor that drives avionics corrosion is that corrosion is an electrochemical process that needs an electrolyte. Moisture provides that electrolyte, allowing ions to move and reactions to occur on metal surfaces. Salt accelerates this by supplying ions that increase conductivity and the rate of the corrosion reactions, especially in humid or coastal environments where salt spray is present. Dirt and dust contribute by trapping moisture and salts on surfaces and creating localized corrosion sites where coatings can break down or shields can be bypassed. Light exposure, while it can affect materials in other ways (such as degrading coatings or plastics), does not create the conductive environment or chemical reaction necessary for corrosion to proceed, so it isn’t listed as a major cause.