Home Inspection Flashcard #60
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What's Your Call?
What type of corrosion is this and what would cause it?
a. Crevice corrosion developing from an over-driven fastener.
b. Galvanic corrosion, fastener is different metal from roof steel.
c. Filiform corrosion, developing from micro-cracks at hole drilled for fastener.
d. Surface corrosion developing from moisture trapped against the roof at the time the roof mastic was applied.
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