What does 'galvanic corrosion' mean in the context of automotive body repair, and which material pairing is most at risk?
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A
Rust caused by road salt on steel panels; most common on rocker panels
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B
Electrochemical corrosion occurring when dissimilar metals contact each other in the presence of an electrolyte; aluminum and steel are a high-risk pairing
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C
Paint oxidation on older vehicles caused by UV exposure; most common on horizontal surfaces
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D
Corrosion inside sealed structural cavities caused by trapped moisture; most common in sills