Galvanic Corrosion

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Fasteners for Aluminum

  • This article says that stainless is best for screwing in aluminum, but must minimize corrosion such as rubber washer between screw head and aluminum sheet. It does not talk about contact between threads of screw and the aluminum - it appears the head is more important than the threads. [1]

Deck Screws

  • Are deck screws compatible with aluminum?

Aluminum and Galvanized Steel

  • Not compatible. Use rubber washer between.