In aluminum skin repair, what step is performed after removing corrosion to sound metal?

• A. Apply corrosion inhibitor
• B. Immediate paint
• C. Do nothing
• D. Replace entire skin

Answer: (A)

After removing corrosion, the next essential step is to protect the freshly exposed aluminum by applying a corrosion inhibitor. This chemical treatment forms a protective film or conversion coating on the clean metal, slowing down future oxidation and reducing the chance of re-initiating corrosion. It also helps the upcoming primer and paint adhere properly and seal micro-pores that could trap moisture. Skipping this step or painting immediately without protection can leave the surface vulnerable to rapid corrosion. Replacing the skin is not warranted for this scenario if the remaining metal is sound.